operator s manual 2019-2020 model years

Operator’s ManualOperator s Manual’ 2019-2020 Model Years2017 Emissions

Warranty

Engine Operation..................................... 1

Engine Maintenance..................................... 2

Engine Warranty..................................... 3

Contents

© 2019 PACCAR Inc. - All Rights ReservedThis manual illustrates and describes the operation of features or equipment which may be eitherstandard or optional on this vehicle. This manual may also include a description of features andequipment which are no longer available or were not ordered on this vehicle. Please disregard anyillustrations or descriptions relating to features or equipment which are not on this vehicle. PACCARreserves the right to discontinue, change specifications, or change the design of its vehicles at anytime without notice and without incurring any obligation. The information contained in this manual isproprietary to PACCAR. Reproduction, in whole or in part, by any means is strictly prohibited withoutprior written authorization from PACCAR Inc.

Contents

Chapter 1 | ENGINE OPERATIONIn this Chapter:

Safety - Introduction..............................................................................................................................5Emergency - What To Do If.................................................................................................................10Operating Instructions.........................................................................................................................13

ENGINE OPERATION -

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Safety - Introduction

Using this ManualPlease take the time to get acquainted withyour vehicle by reading this Operator’sManual. We recommend that you read andunderstand this manual from beginning toend before you operate this equipment.This manual contains useful information forthe safe and efficient operation of thisequipment. It also provides serviceinformation, with an outline for performingsafety checks and basic preventivemaintenance inspections. We have tried topresent the information you’ll need to learnabout functions, controls, and operation—and to present it as clearly as possible. Wehope you’ll find this manual easy to use.There will be times when you need to takethis manual out of the glovebox. When youdo, please be sure to return it when youare finished using it. That way it will bethere when you need it the next time orwhen you pass the vehicle on to the nextuser.

NOTE

After you've read this manual, it shouldbe stored in the cab for convenient ref-erence and remain with this truckwhen sold.

Your vehicle may not have all the featuresor options mentioned in this manual.Therefore, you should pay careful attentionto the instructions that pertain to just yourvehicle. In addition, if your vehicle isequipped with special equipment or optionsnot discussed in this manual, consult yourdealer or the manufacturer of theequipment.There are several tools built into thismanual to help you find what you needquickly and easily. First is the Quick Tableof Contents. Located at the front of themanual, this lists the main subjectscovered and gives section numbers whereyou can find these subjects. Use the QuickTable of Contents to find information on alarge subject like “Maintenance.” Cross-referenced citations also help you get theinformation you need. If some other part ofthe manual contains further information onthe subject you are reading about, we’ll

indicate that in a cross-reference like this:(See Safety Alerts on page 5). You won’thave to go searching for more information.Finally you’ll find a helpful Subject Index.It’s in the back of the manual andalphabetically lists the subjects covered.So if you want information on brakes, forexample, just look under Brake in theSubject Index. You’ll find all the pageslisted where brakes or braking arediscussed.All information contained in this manual isbased on the latest production informationavailable at the time of publication.Kenworth Truck Company Peterbilt MotorsCompany reserves the right to makechanges at any time without notice.

Safety AlertsRead and follow all of the safety alertscontained in this manual. They are therefor your protection and information. Thesealerts can help you avoid injury to yourself,your passengers, and help prevent costlydamage to the vehicle. Safety alerts arehighlighted by safety alert symbols andsignal words such as “WARNING,”“CAUTION,” or “NOTE.” DO NOT ignoreany of these alerts.

ENGINE OPERATION - Safety - Introduction

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Warnings

The safety message following this symboland signal word provides a warning againstoperating procedures which could causedeath or injury. They could also causeequipment or property damage. The alertwill identify the hazard, how to avoid it, andthe probable consequence of not avoidingthe hazard.Example:

WARNING

Hot engine oil can be dangerous. Youcould be burned. Let the engine oilcool down before changing it. Failureto comply may result in death, person-al injury, equipment or property dam-age.

Cautions

The safety message following this symboland signal word provides a caution againstoperating procedures which could causeequipment or property damage. The alertwill identify the hazard, how to avoid it, andthe probable consequence of not avoidingthe hazard.Example:

CAUTION

Continuing to operate your vehicle withinsufficient oil pressure will cause seri-ous engine damage. Failure to complymay result in equipment or propertydamage.

Notes

The message following this symbol andsignal word provides important informationthat is not safety related but should befollowed. The alert will highlight things thatmay not be obvious and is useful to yourefficient operation of the vehicle.Example:

NOTE

Pumping the accelerator will not assistin starting the engine.

ForwardThis manual contains information for thecorrect operation and maintenance of yourPACCAR engine. Read and follow allsafety instructions. Refer to the WARNINGin the General Safety Instructions on page7. Keep this manual with the equipment.If the equipment is traded or sold, give themanual to the new owner.The information, specifications, andrecommended maintenance guidelines inthis manual are based on information ineffect at the time of printing. PACCARreserves the right to make changes at anytime without obligation. If you finddifferences between your engine and theinformation in this manual, contact yourlocal PACCAR Authorized Repair Locationor write to:

PACCAR c/o PACCAR Engines

PO Box 1518 Bellevue, WA 98009


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The latest technology and the highestquality components were used to producethis engine. When replacement parts areneeded, we recommend using onlygenuine parts from PACCAR.

NOTE

Warranty information including theEPA and California Emission Warrantyis located in the section entitled “En-gine Warranty.” Make sure you are fa-miliar with the warranty or warrantiesapplicable to your engine.

IllustrationsSome of the illustrations throughout thismanual are generic and will not lookexactly like the engine or parts used inyour application. The illustrations cancontain symbols to indicate an actionrequired and/or an acceptable orunacceptable condition.The illustrations are intended to showrepair or replacement procedures. Theprocedure will be the same for allapplications, although the illustrations maydiffer.

General Safety Instructions

WARNING

Improper practices, carelessness, orignoring any warnings may causeproperty damage, personal injury, ordeath.

Before performing any repair, read andunderstand all of the safety precautionsand warnings. The following is a list ofgeneral safety precautions that must befollowed to provide personal safety. Failureto follow these instructions may causedeath or injury. Special safety precautionsare included in the procedures when theyapply.Keep in mind that even a well maintainedvehicle must be operated within the rangeof its mechanical capabilities and the limitsof its load ratings. See the Weight Ratingslabel on the driver's door edge.Every new vehicle is designed to conformto all Federal Motor Vehicle SafetyStandards applicable at the time ofmanufacture. Even with these safetyfeatures, continued safe and reliableoperation depends greatly upon regularvehicle maintenance. Follow the

maintenance recommendations found inPreventive Maintenance section. This willhelp preserve your investment.Make sure your vehicle is in top workingcondition before heading out on the road, itis the responsible driver's duty to do so.Inspect the vehicle according to theDriver's Check List.

• Use the proper tool for manuallyrotating the engine. DO NOTattempt to rotate the crankshaft bypulling or prying on the fan. Thispractice can cause death, personalinjury, equipment damage, ordamage to the fan blades, causingpremature fan failure.

• Work areas should be dry, well lit,well ventilated, free from clutter,loose tools, parts, ignition sourcesand hazardous substances.

• Wear protective glasses andprotective shoes when working.

• DO NOT wear loose-fitting or tornclothing. Tie back and/or tuck inlong hair. Remove all jewelry whenworking.

• Before beginning any repair,disconnect the battery (negative [-]cable) and discharge anycapacitors.


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• Put a “DO NOT OPERATE” tag inthe operator's compartment or onthe controls.

• Allow the engine to cool beforeslowly loosening the coolant fillercap to relieve the pressure from thecooling system.

WARNING

Removing the fill cap on a hot enginecan cause scalding coolant to sprayout and burn you badly. If the enginehas been in operation within the previ-ous 30 minutes, be very careful in re-moving the fill cap. Protect face,hands, and arms against escaping flu-id and steam by covering the cap witha large, thick rag. DO NOT try to re-move it until the surge tank cools downor if you see any steam or coolant es-caping. Always remove the cap veryslowly and carefully. Be ready to backoff if any steam or coolant begins toescape.

• Always use wheel chocks or properjack stands to support the vehicleor vehicle components beforeperforming any service work. DO

NOT work on anything that issupported only by lifting jacks or ahoist. Before resting a vehicle onjack stands, be sure the stands arerated for the load you will beplacing on them.

• Before removing or disconnectingany lines, fittings, or related items,relieve all pressure in the air, oil,fuel, and cooling systems. Remainalert for possible pressure whendisconnecting any device from asystem that contains pressure.High pressure oil or fuel can causedeath or personal injury.

• Always wear protective clothingwhen working on any refrigerantlines and make sure that theworkplace is well ventilated.Inhalation of fumes can causedeath or personal injury. To protectthe environment, liquid refrigerantsystems must be properly emptiedand filled using equipment thatprevents the release of refrigerantgas. Federal law requires capturingand recycling refrigerant.

• When moving or lifting any heavyequipment or parts, make sure touse proper techniques andassistance. Ensure all lifting

devices such as chains, hooks, orslings are in good condition andare of the correct load capacity.Make sure all lifting devices arepositioned correctly.

• Corrosion inhibitors and lubricatingoils may contain alkali. DO NOTget the substance in eyes andavoid prolonged or repeatedcontact with skin. DO NOTswallow. If ingested, seekimmediate medical attention. DONOT induce vomiting. In case ofcontact, immediately wash skinwith soap and water. In case ofharmful contact, immediatelycontact a physician. Always keepany chemicals OUT OF REACHOF CHILDREN.

• Naphtha and Methyl Ethyl Ketone(MEK) are flammable materials andmust be used with caution. Followthe manufacturer's instructions toensure safety when using thesematerials. Always keep anychemicals OUT OF REACH OFCHILDREN.

• When working on the vehicle, bealert for hot parts on systems thathave just been turned off, exhaustgas flow, and hot fluids in lines,


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tubes, and compartments. Contactwith any hot surface may causeburns.

• Always use tools that are in goodcondition. Make sure you have theproper understanding of how to usethe tools before performing anyservice work. Use only genuinereplacement parts from PACCAR.

• Always use the same fastener partnumber (or equivalent) whenreplacing items. DO NOT use afastener of lesser quality ifreplacements are necessary. (e.g.,DO NOT replace a SAE 10.9 gradewith 8.8 grade fastener.)

• Always torque fasteners and fuelconnections to the requiredspecifications. Overtightening orunder-tightening can allow leakage.

• Close the manual fuel valves priorto performing maintenance andrepairs, and when storing thevehicle inside.

• DO NOT perform any repair whenimpaired, tired, fatigued, or afterconsuming alcohol or drugs thatcan impair your functioning.

• Some state and federal agencies inthe United States of America have

determined that used engine oilcan be carcinogenic and can causereproductive toxicity. Avoidinhalation of vapors, ingestion, andprolonged contact with used engineoil.

• DO NOT connect the jump startingor battery charging cables to anyignition or governor control wiring.This can cause electrical damageto the ignition or governor.

• Coolant is toxic. If not reused,dispose of coolant in accordancewith local environmentalregulations.

CAUTION

Corrosive chemicals can damage theengine. DO NOT use corrosive chemi-cals on the engine. Failure to complymay result in equipment or propertydamage.

California Proposition 65 Warning• Diesel engine exhaust and some of

its constituents are known to theState of California to cause cancer,birth defects, and otherreproductive harm.

• The catalyst substrate located inthe Diesel Particulate Filter (DPF)contains vanadium pentoxide,which has been determined by theState of California to cause cancer.Always wear protective clothingand eye protection when handlingthe catalyst assembly. Dispose ofthe catalyst in accordance withlocal regulations. If catalystmaterial gets into the eyes,immediately flood eyes with waterfor a minimum of 15 minutes. Avoidprolonged contact with skin. Incase of contact, immediately washskin with soap and water. In caseof harmful contact, immediatelycontact a physician.

• Other chemicals in this vehicle arealso known to the State ofCalifornia to cause cancer, birthdefects or other reproductive harm.

• Battery posts, terminals, andrelated accessories contain leadand lead compounds, chemicalsknown to the State of California tocause cancer and reproductiveharm. Wash hands after handling.


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Emergency - What To Do If

Roadside AssistanceCall toll-free to talk to someone at thePACCAR Customer Center:

• Kenworth customers call: 1-800-KW-Assist (1-800-592-7747) |Peterbilt customers call:1-800-4Peterbilt (800-473-8372)

• Open 24-7-365 days a year.• They can help you get roadside

assistance.• They have a custom mapping

system which locates authorizedPACCAR engine dealers andIndependent Service Providers(ISPs) near you and lists types ofservices offered, hours of operationand contact information.

• They can assist with jump and pullstarts, tires, trailers, fines andpermits, chains, towing, hazardousclean-up, out of fuel (roadside),mechanical repairs and preventivemaintenance services.

• They have multilingual agents andaccess to a translation service to

ensure quality assistance forcustomers in any language.

• They can’t answer your warrantyquestions, but can get you incontact with an authorized dealerwho can.

• The PACCAR Customer Centerservice is FREE.

Stop Engine Lamp

1 2The stop engine warning lamp willilluminate, and an audible tone will sound,when a major engine problem exists. Yourvehicle will be equipped with one of theindicators above, 1 or 2, depending on theengine model.

WARNING

If the Stop Engine warning lamp illumi-nates, it means you have a serious en-gine system problem. This should beconsidered an emergency. You should

stop the vehicle as safely as possibleand turn OFF the ignition. The vehiclemust be serviced and the problem cor-rected before driving again. Failure tocomply may result in death, personalinjury, equipment or property damage.

For engines with the engine-protectionshutdown feature enabled, the stop enginelamp will begin to flash 30 seconds beforethe engine automatically shuts down. Thewarning lamp alerts the operator to theimpending shutdown.The lamp will also illuminate when the DEFtank is almost empty or the soot level in theDPF is at full capacity. At this levelwarning, regeneration cannot be performedand engine power will be derated.Engine may automatically shut down if thecheck engine lamp and stop engine lampare illuminated and the operator does notcorrect the condition.

ENGINE OPERATION - Emergency - What To Do If

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Engine Oil Pressure Lamp TurnsOn

It is important to maintain oil pressurewithin acceptable limits. If oil pressuredrops below the minimum psi a redwarning lamp on the oil pressure gaugeand the Stop Engine Lamp will come ON.

CAUTION

Continuing to operate your vehicle withinsufficient oil pressure will cause seri-ous engine damage. Failure to comply

may result in equipment or propertydamage.

• If the oil pressure fails to rise within10 seconds after the engine starts,stop the engine and determine thecause.

• See Engine Oil Specification for thecorrect oil pressure ranges for yourvehicle's engine.

• If the oil pressure suddenly drops,or the audible alarm and engine oilpressure warning light come onwhile driving, do the following:

1. Slow down carefully.2. Move a safe distance off the road

and stop.3. Place the transmission in neutral

(N) and set the parking brake. (SeeParking Brake Valve and Operatingthe Transmission in your vehicleOperator's Manual, fortransmission shifting and parkingbrake information.)

4. Turn OFF the engine.5. Turn ON the emergency flasher

and use other warning devices toalert other motorists.

6. Wait a 15-20 minutes to allow oil todrain into the engine oil pan, andthen check the oil level. SeeEngine Oil Level.

7. Add oil if necessary. If the problempersists, contact an authorizedPACCAR engine dealer as soon aspossible.

Check Engine Lamp Turns On

Or

Check Engine Lamp - Turns on when aproblem exists, but the vehicle can still besafely driven. Vehicle should be serviced tocorrect the problem but the situation shouldnot be considered an emergency.The lamp will also illuminate when a DPFregeneration or addition of diesel exhaustfluid (DEF) is required. For PACCAR PXEngines, this icon may also illuminate if thecrankcase breather element needsattention. Another function of the check


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engine lamp is to warn the operator of animpending idle shutdown. When the idleshutdown timer is 30 seconds fromexpiring, the ECM begins flashing thecheck engine warning lamp once persecond. When the timer expires, the ECMwill turn off the warning lamp and shutdown the engine.

Engine is Overheating

CAUTION

The cooling system may overheat ifthe engine coolant is at the minimumlevel. A sudden loss of coolant,caused by a split hose or broken hoseclamp could also lead to an overheatcondition. Always inspect to ensurehoses and clamps are not cracked,worn, or loose. Failure to comply mayresult in equipment or property dam-age.

NOTE

The system may also temporarily over-heat during severe operating condi-tions such as:• Climbing a hill on a hot day• Stopping after high-speed/high-

load driving• Debris blocking air flow through

the cooling module (radiator)

If the engine coolant temperature warninglamp comes on and the audible alarmsounds showing an overheat condition, orif you have any other reason to suspect theengine may be overheating, DO NOTTURN OFF THE ENGINE unless a lowwater warning device indicates a loss ofcoolant.Follow these steps if the engine coolanttemperature is rising, or the temperature isalready above normal, and there are noother warning alarms displayed in theinstrument cluster.

NOTE

The instrument cluster gauges mayappear, if hidden from view, changebrightness and change color to bringattention to a particular system.

1. Reduce engine speed, or stop.When stopped, place thetransmission in neutral (N) and setthe parking brake. Keep the enginerunning. See the vehicle operator'smanual for instructions ontransmission shifting and parkingbrake information.


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WARNING

To reduce the chance of personal in-jury, vehicle damage, and/or deathfrom overheated engines, which canresult in a fire, never leave the engineidling without an alert driver present. Ifthe engine does overheat, as indicatedby the engine coolant temperaturelamp, immediate action is required tocorrect the condition. Continued unat-tended operation of the engine, evenfor a short time, may result in seriousengine damage or a fire. Failure tocomply may result in death, personalinjury, equipment or property damage.

WARNING

Removing the fill cap on a hot enginecan cause scalding coolant to sprayout and burn you badly. If the enginehas been in operation within the previ-ous 30 minutes, be very careful in re-moving the fill cap. Protect face,hands, and arms against escaping flu-id and steam by covering the cap witha large, thick rag. DO NOT try to re-move it until the surge tank cools down

or if you see any steam or coolant es-caping. Always remove the cap veryslowly and carefully. Be ready to backoff if any steam or coolant begins toescape.

NOTE

Keep the engine running at idle speedunless a warning icon turns on that re-quires the engine to be shut off.

2. Check to ensure the Oil PressureGauge reads normal.

3. Make sure the engine fan is turningby switching the Engine Fan Switchfrom AUTO to MAN (Manual).

4. Idle the engine to see if thisreduces the coolant temperature. Ifthe temperature does not begin todrop, shut off the engine andcontact your nearest authorizeddealer.

5. If the temperature begins to returnto normal, allow the engine to idle 3to 5 minutes before shutting it off.This allows the engine to coolgradually and uniformly.

6. If overheating came from severeoperating conditions, the

temperature should have cooled bythis time. If it has not, stop theengine and let it cool beforechecking to see if the coolant islow.

7. Be sure the vehicle is parked onlevel ground or the readings maybe incorrect. Check the coolantlevel at the coolant surge tank.

Check the coolant level after each tripwhen the engine has cooled. The coolantlevel should be visible within the surgetank. Add coolant if necessary.

Operating Instructions

Engine Warning LampsThe following engine warning lampssection covers only the lamps controlled bythe engine’s Electronic Control Module(ECM). Please refer to the vehicle“Operator's Manual” and “EngineAftertreatment Systems” manuals foradditional warning lamp information.

ENGINE OPERATION - Operating Instructions

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CAUTION

The installation of electronic devices tothe On Board Diagnostics (OBD) con-nector, the vehicle Controller Area Net-work (CAN), or their associated wiringis not permitted. Doing so can ad-versely affect vehicle performanceand/or cause fault codes to be record-ed. The OBD connector is provided fortemporary connection of service toolsand for diagnostic purposes only.

Stop Engine Lamp

1 2The stop engine warning lamp willilluminate, and an audible tone will sound,when a major engine problem exists. Yourvehicle will be equipped with one of theindicators above, 1 or 2, depending on theengine model.

WARNING

If the Stop Engine warning lamp illumi-nates, it means you have a serious en-gine system problem. This should beconsidered an emergency. You shouldstop the vehicle as safely as possibleand turn OFF the ignition. The vehiclemust be serviced and the problem cor-rected before driving again. Failure tocomply may result in death, personalinjury, equipment or property damage.

For engines with the engine-protectionshutdown feature enabled, the stop enginelamp will begin to flash 30 seconds beforethe engine automatically shuts down. Thewarning lamp alerts the operator to theimpending shutdown.The lamp will also illuminate when the DEFtank is almost empty or the soot level in theDPF is at full capacity. At this levelwarning, regeneration cannot be performedand engine power will be derated.Engine may automatically shut down if thecheck engine lamp and stop engine lampare illuminated and the operator does notcorrect the condition.

Engine, Check Engine

Or

Illuminates when a non emissions relatedproblem exists, but the vehicle can still besafely driven. Vehicle should be serviced tocorrect the problem but the situation shouldnot be considered an emergency.

Malfunction Indicator Lamp

Illuminates when an engine emissionsfailure has occurred. The vehicle can besafely driven but should be serviced tocorrect the problem. The situation shouldnot be considered an emergency. In somecases, the Malfunction Indicator Lamp(MIL) will activate in conjunction with theHigh Exhaust System Temperature


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(HEST), Diesel Particulate Filter (DPF) andDiesel Exhaust Fluid (DEF) warning lamps.

NOTE

The malfunction indicator lamp (MIL)will illuminate if the on-board diagnos-tics (OBD) system detects a possibleemissions system failure. The vehicleshould be brought in for service at thenext opportunity to ensure the condi-tion is corrected.

Diesel Particulate Filter (DPF)Warning LampThis warning symbol will appear when theDPF needs to be regenerated and thenalso during the regeneration cycle. Thisicon may also appear if the system isattempting to automatically regeneratewhile the vehicle is in Power Take Offoperation mode.

Engine aftertreatment system includes adiesel particulate filter and DPF warninglamp.

High Exhaust System Temperature(HEST) Warning Lamp

Keep vehicle a safe distance fromcombustible items.

WARNING

Temperature of the tail pipe, exhaustpipe, the diesel particular filter (DPF)/selective catalytic reduction (SCR) de-vice and surrounding components in-cluding enclosures and steps, will beelevated during and shortly after a re-generation event or normal vehicle op-eration when engine is under high orheavy loading.

If the High Exhaust System Temperature(HEST) warning lamp is on:

• Do not park in an area ofcombustible vapors or materials.You must keep combustibles atleast 5 ft. (1.5 m) away from theexhaust (outlet) stream (as it exitsthe tail pipe) while the HEST lampis illuminated. Always park yourvehicle outside. Failure to do socould ignite an explosion or harmbystanders which could result inserious injury.

• Do not park in an area wherepeople are close by. You must keepcombustibles at least 5 ft. (1.5 m)away from the exhaust outlet whilethe HEST lamp is illuminated.Failure to do so could result inserious injury.

• Do not approach the exhaustsystem or surrounding areaswithout allowing adequate time forthe system to cool down. Failure todo so could result in serious burnsto the skin.

Diesel Exhaust Fluid (DEF) LampThe engine aftertreatment system includesa diesel exhaust fluid (DEF) warning lamp


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on the DEF gauge and additional warninglamps in the instrument cluster.DEF Warning Lamp in Instrument Cluster

Diesel Exhaust Fluid (DEF) Gauge

211. DEF Symbol2. DEF gauge warning lamp

The DEF lamp(s) will illuminate when thefluid in the DEF tank reaches a low level. Ifthe lamp illuminates but the level is full,seek service immediately for DEF fluidquality or DEF equipment repair.

Engine Wait-To-Start LampThis warning icon will appear when thesystem needs some time before attemptingto start the engine. The lamp will illuminateat key ON, and will stay on for a period ofup to 30 seconds.

NOTE

The length of time the 'Wait-To-Start'lamp remains illuminated depends onthe ambient temperature. The lowerthe ambient temperature, the longerthe lamp will be illuminated.

Once the Wait-to-Start lamp turns off, turnthe key to the starting position to start theengine.You may see this appear if the system hasdetected a situation where the starter is toohot and needs to cool down. Alternatively,you may see it when the engine grid heateris on and needs some time to warm up.(PACCAR PX and Cummins ISL engines)

NOTE

Some engines are equipped with anengine starting motor protection fea-ture. If the starting motor is engagedfor 30 or more seconds, without theengine starting, the starter will belocked out from operating, allowing forproper cooling of the starting motor.During this time, the 'Wait-To-Start'lamp will flash for 2 minutes. Once thelamp stops flashing, the starting motorwill be allowed to function.

Engine Braking SystemAn engine compression brake is standardon the PX-7 engines. Optionally, thisengine may be equipped with an exhaustbrake. When activated, these devicescreate a braking effect on the drive wheels.Because it can help keep your vehicle’sbrakes from overheating, it can save wearand tear on the service brakes. However,the engine compression or exhaust brakeis not an emergency brake or the primaryvehicle brake.


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WARNING

DO NOT operate the engine compres-sion brake when driving/operating yourvehicle bobtail or with a loaded or un-loaded trailer on road surfaces withpoor traction (wet, icy, or snow cov-ered roads) or in heavy traffic. Theremay not be enough weight on the rearaxle to provide traction. Brakingcaused by the normal operation of theengine compression brake couldcause you to lose control of the vehi-cle, resulting in an injury accident.Make sure the engine brake is switch-ed "OFF" when bobtailing or with anunloaded trailer. Failure to comply mayresult in death, personal injury, equip-ment or property damage.

WARNING

The service brakes must be used in anemergency. The engine compressionbrake alone might not stop the vehiclefast enough to prevent an accident.The engine compression brake is NOTintended as the primary brake for the

vehicle, nor is it an emergency brake.The engine compression brake onlyhelps the service brakes by using en-gine back pressure to slow the drive-train. Use the service brakes for quickstops. You could be seriously injured ifyou relied only on the engine compres-sion brake to stop the vehicle in anemergency. Failure to comply may re-sult in death, personal injury, equip-ment or property damage.

CAUTION

DO NOT operate the engine brake un-til the engine oil temperature is above86°F (30°C). Operation below 86°F(30°C) could cause severe damage tothe engine. Idle the engine four mi-nutes at approximately 1,000 rpm towarm the engine before activating theengine brakes.

NOTE

If your vehicle is equipped with anti-lock brakes (ABS), operation of the

compression brake (if turned ON) maybe interrupted if the ABS system de-tects wheel-slip due to operation onslippery surfaces.

Ideally (on normal road surfaces), youshould slow your vehicle with thecompression brake (where permitted bylaw) and use the service brakes only forstopping completely. Operating this waywill greatly prolong the life of the servicebrakes.

Compression BrakeWith the compression brake switch ON, thebrake automatically creates its brakingeffect when you remove your foot from theaccelerator pedal.The brake switch is located on theaccessory dash panel. It controls whetherthe brake is ON (ready to slow the vehicledown) or OFF (no braking action).

1. Do not use the engine compressionbrake to slow the vehicle downwhen you are bobtailing or pullingan empty trailer.

2. Make sure the brake is OFF beforestarting the engine.

3. After the engine is started, warmedup and you are ready to get under


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way, turn the engine compressionbrake switch ON for added brakingeffect.

NOTE

If your vehicle is equipped with the Ea-ton Vorad® system, operation of thecompression brake may be automati-cally activated.

Compression Brake ControlsThere are two switches on the dash panelthat control the engine compression brake.A master switch turns the system ON orOFF. A second switch, located next to themaster switch, controls the braking effect.This switch allows you to chooseprogressively stronger braking to slow thevehicle down.Engine compression brake controlsinclude:

• ON/OFF switch• Three-position selector switch• Clutch switch• Throttle sensor• Service brake pressure switch• Eaton Vorad® Anti-Lock Braking

System

Engaging conditions for the enginecompression brake:

• Engine speed must be above 1,000rpm.

• Coolant temperature must beabove 59°F (15°C).

Deactivation conditions for the enginecompression brake:

• Accelerator pedal is depressed.• Clutch pedal is depressed.• Engine speed falls below 800 rpm.• ABS control is active.• ECM recognizes a system

problem.

CAUTION

Operating the engine with a compres-sion brake that will not automaticallydeactivate (i.e. when the dash switchis OFF, clutch pedal is depressed orthrottle is applied) will cause severe in-ternal engine damage. DO NOT oper-ate the engine if the compressionbrake will not deactivate. Failure tocomply may result in equipment orproperty damage.

Engine Compression Brake LevelSwitch OperationThere are two switches that control yourvehicle’s engine compression brake. Oneswitch turns the system ON/OFF and thesecond switch controls the braking level.These switches are located on the dashswitch panel.For the three-position engine compressionbrake level switch, there will be 100percent engine braking when the switch isin the up (HIGH) position. In the middle(MEDIUM) position, there will be 66percent engine braking. In the down (LOW)position there will be 33 percent enginebraking.With the compression brake switch ON, thecompression brake will be engaged whenthe service brake is applied. If the cruisecontrol is operated in conjunction with thecompression brake, the compression brake


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will engage to maintain the cruise setspeed.Compression on\off

Compression setting

DrivingCorrect care of your engine will result inlonger life, better performance, and moreeconomical operation.Follow the daily maintenance checks listedin Engine Maintenance on page 32.The new PACCAR engine associated withthis manual does not require a “break-in”procedure. This section of the manual

provides all of the necessary informationrequired for proper engine operation.

Check the engine oil pressure and enginecoolant gauges, warning lamps, and othergauges daily to make sure they areoperational. Normally each gauge willmake a full sweep when ignition key iscycled ON to indicate that the gauge isoperating correctly.


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Combustible Vapors

1 DO NOT use combustible gas in turbo

NOTE

Numerous safety devices (i.e. engineshutoff devices) are available to mini-mize the risk of engine overspeedingcaused by combustible vapors beingingested into the air intake system.

PACCAR recommends the installation ofan air intake shutoff device or a similarsafety device to minimize the risk ofoverspeeding, as can occur when thevehicle is being operated in a combustibleenvironment, such as from a fuel spill orgas leak.

WARNING

Combustible vapors near the air intakesystem could be ingested into the en-gine, causing the engine to suddenlyaccelerate and overspeed. This condi-tion could result in the operator losingcontrol of the vehicle if an unexpectedincrease in engine rpm occurs. Com-bustible vapors could also cause a fire.DO NOT operate your vehicle in an

area where combustible chemicals orvapors may be present. Failure tocomply may result in death, personalinjury, equipment or property damage.

NOTE

IT IS THE RESPONSIBILITY OF THEOWNER AND OPERATOR TO OPER-ATE THE VEHICLE IN A SAFE ENVI-RONMENT.

NOTE

If the engine is running, increase en-gine speed (rpm) or operate the vehi-cle until the low oil pressure warninglamp turns off.


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CAUTION

Engaging the starter motor for morethan 30 seconds in any five minute pe-riod may cause it to overheat and candamage the starter.• If starter is engaged continuous-

ly for 30 seconds, you must waitfive minutes before trying to startthe engine to allow the startermotor to cool down.

With the key in the ON position, the enginewarning lamps will come on momentarilyand then go out. The engine warninglamps include:

Check engine lamp; amber in color.

Stop engine lamp; red in color.

Diesel particulate filter (DPF) statusindicator; yellow in color.

Diesel Exhaust Fluid (DEF) indicator;yellow in color.

High exhaust system temperature (HEST);amber in color.

Malfunction Indicator Lamp; amber in color.

Normal Starting ProcedureAllow the Wait-To-Start warning lamp toturned off. Engine Wait-To-Start Lamp onpage 16Follow this engine starting procedure whenthe outside temperature is above 50°F(10°C).

1. Ensure the parking brake is set ONand the transmission shift lever isin neutral. For automatictransmissions, be sure the shiftlever is in the neutral position (N).For automatic transmissions thathave park (P) position, place theshift lever in park.

2. With the accelerator pedal in theidle position, turn the ignition key tothe START position to start theengine.

3. If the engine does not start after 10seconds, release the key. Wait anadditional 10 seconds to allow thestarter motor to cool, then trystaring the engine again.

4. Once the engine has started, waitfor the oil pressure to rise, and thelow oil pressure warning lamp toturn off, before increasing rpm.


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Cold Weather StartingAllow the Wait-to-Start warning lamp toturn off. Engine Wait-To-Start Lamp onpage 16Follow this engine starting procedure whenthe outside temperature is below 50°F(10°C).

CAUTION

To reduce the possibility of damage tothe lubricating oil pan, due to the ma-terials used in the manufacture of thelubricating oil pan, under no circum-stances should an external heatsource be applied directly or indirectlyto the lubricating oil pan.

1. Follow the Normal StartingProcedure on page 21.

Refer to the vehicle operator's manualinstructions for any additional cold weatherstarting procedures.

2. If starting a cold engine, slowlyincrease the engine speed. Thisprovides adequate lubrication tothe bearings and gives ample timeto allow the oil pressure tostabilize.

CAUTION

The use of starting aids, such as ether,may result in damage to the engineand engine aftertreatment system.

3. For coolant temperatures below150°F (70°C), use a low gear anddrive at moderate engine speeduntil the engine coolant hasreached operating temperature. Donot let the engine idle longer thannecessary. If the vehicle cannot bedriven, an elevated idle speed maybe used instead to warm theengine.

CAUTION

DO NOT operate the engine at low idlefor long periods of time when the cool-ant temperature is below the normaloperating range. This could result inthe following:

• Fuel dilution of the lubricatingoil

• Carbon buildup in the com-bustion chamber

• Sticking of the valves in thecylinder head

• Reduced performance• Damage to aftertreatment

components

Starting Procedure After ExtendedShutdown or Oil ChangeAfter extended shutdown or an oil changefollow the Normal Starting Procedure onpage 21.The engine will run at idle only until theminimum oil pressure is detected by theECM. It can take more cranking time tostart the engine after an extended shutdown or oil change.

Operating the EngineMonitor the oil pressure and coolanttemperature gauges frequently. Refer to Engine Oil Capacities and Pressures onpage 42 and Engine CoolantSpecifications on page 48 forrecommended operating pressures andtemperatures. Shut off the engine if anypressure or temperature does NOT meetthe specifications.


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Continuous operation with engine coolanttemperature above or below the enginecoolant temperature specifications listed in“Engine Coolant Specifications on page48” can damage the engine.

Engine Operating RangeProper Engine Operating Range

1. Full throttle rpm2. Peak torque

CAUTION

Operating the engine at full throttle be-low peak torque will shorten engine lifeto overhaul, can cause serious enginedamage, and is considered engineabuse. DO NOT operate the engine atfull throttle operation below peak tor-que rpm for more than 30 seconds.Failure to comply may result in equip-ment or property damage.

PACCAR engines are designed to operateat full throttle under momentary conditionsdown to peak torque engine speed. This isconsistent with recommended operatingpractices.

CAUTION

Operating the engine beyond the max-imum engine speed can cause severeengine damage. Use proper operatingtechniques for the vehicle to preventengine overspeed. See Engine Speci-fications for maximum engine speed.Failure to comply may result in equip-ment or property damage.


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Extended Idling

CAUTION

Prolonged periods of idling can resultin lower than optimal engine/transmis-sion operating temperatures whichcould cause increased rates of wear.An idle shutdown feature (available onPACCAR engines) can be program-med to shut the engine down after aperiod of low idle operation with nodriver activity. A flashing warning lampwill inform the driver of an impendingshutdown. Failure to comply may re-sult in equipment or property damage.

CAUTION

If the truck is equipped with powertake-off (PTO) equipment, the engineshutdown system can be deactivatedwhen the PTO is operational; however,engine idle periods should not exceedfive minutes whenever possible. Fail-ure to comply may result in equipmentor property damage.

Long periods of idle-time (3 hours or more)may accelerate the build-up of soot in thediesel particulate filter (DPF), especially incold weather. The system will illuminate theDPF warning light on the instrument clusterand a message on the Driver InformationDisplay to indicate that the DPF requiresregeneration.

This is not a problem with the vehicle;however, it indicates that the driver needsto start a parked DPF regeneration toprevent equipment damage caused by sootbuild up. If the DPF lamp turns ON and thedriver is prompted to through drivernotifications, perform a parked DPFRegeneration.

CAUTION

If you ignore the warning lamp and donot initiate regeneration at the soon-est, safest possible time, the DPF will

become increasingly clogged with sootand can lead to severe engine derate.Failure to comply may result in equip-ment or property damage.

Extended engine idling may also increasehydrocarbon deposits and moisture in theDPF. The engine will increase rpmautomatically, regardless if the DPF lamp ison or off, to remove these hydrocarbondeposits and moisture. The engine speedwill remain elevated for 20-60 minutes. Ifnecessary, the rpm may be lowered bybriefly depressing the throttle, clutch, orbrake pedal. If the driver cancels theautomatic cycle using the pedals, thesystem will restart the cycle 10 minuteslater with increased rpm until all of thedeposits are removed from the DPF. If thevehicle cannot perform an automatic cycle,the driver may be prompted with messageto regenerate the DPF with a "Do NotDrive" message. The driver must completea regeneration before driving. If the "DoNot Drive" message is ignored and a DPFregeneration is not fully completed beforedriving, there is a high possibility ofequipment damage.If an engine must idle for an extendedperiod of time, idle the engine at the lowestrpm that maintains the engine coolant at


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150°F (70°C), or above. Following theseguidelines will help reduce engine wearduring idling and the frequency of DPFregenerations.

Engine Shutdown

NOTE

DO NOT shut off the engine immedi-ately. A hot engine stores a greatamount of heat and it does not cooldown immediately after it is shut off.Always cool the engine down beforeshutting it off. You will greatly increaseits service life.

Idle the engine at 1,000 rpm for fourminutes. Then low idle for 30 secondsbefore shutdown. This will allow circulatingcoolant and lubricating oil to carry heataway from the cylinder head, valves,pistons, cylinder liners, turbocharger, andbearings. This way you can prevent enginedamage that may result from unevencooling.

NOTE

For engines equipped with an elec-tronic control module (ECM), ensurethe ignition switch is turned OFF for aminimum of 100 seconds prior to dis-connecting the continuous (unswitch-ed) battery power supply. If the un-switched battery power supply is dis-connected in less than 100 secondsafter the ignition switch is turned OFF,active fault codes and incorrect ECMinformation may occur.

CAUTION

Failure to follow the correct shutdownprocedure may result in damage to theturbocharger and shorten the turbo-charger life.

Electromagnetic InterferenceIf not installed correctly, some vehicleaccessories (CB radios, mobiletransmitters, etc.) can generate and useradio frequency energy that may causeelectromagnetic interference (EMI)

between the accessory and theelectronically controlled fuel system. Underthese conditions, PACCAR is not liable forany performance problems with either thefuel system or the accessory. EMI is notconsidered by PACCAR to be an enginefailure and therefore is not warrantable.

System EMI SusceptibilityPACCAR products are designed andtested for minimum sensitivity to incomingelectromagnetic energy. The fuel systemEMI susceptibility has been designed witha high tolerance against EMI and in mostnormal circumstances, if not all,electromagnetic energy-emitting devicesthat meet the Federal CommunicationsCommission legal requirements shouldcause no interference.

System EMI Radiation LevelsElectronic components are required topass various PACCAR and industry EMIspecifications. Our testing has shown thatwhen the engine is properly installed andmaintained, it will not interfere with properlyinstalled on-board communicationequipment.If any interference condition is noticed,follow these suggestions to reduce theamount of EMI:


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1. Locate the accessory receivingantenna further away.

2. Check with the accessory supplierrepresentative in your area to:

• Accurately calibrate theaccessory for proper frequency,power output, and sensitivity.

• Determine the optimumantenna location by obtainingantenna reflective energy datameasurements.

• Ensure that the optimumantenna type and mountingarrangement is being used.

• Ensure the accessoryequipment is properlyconstructed for maximumfiltering to reject incomingelectromagnetic noise.

Operating on Level and DryPavement

WARNING

DO NOT use the engine brake whenoperating on road surfaces with poortraction (such as wet, icy, or snow cov-ered roads, or gravel). Retarders can

cause the wheels to skid on a slipperysurface. You could lose control of thevehicle and/or jackknife if the wheelsbegin to skid, resulting in an accident.Failure to comply may result in death,personal injury, equipment or propertydamage.

WARNING

DO NOT operate the engine compres-sion brake when driving/operating yourvehicle bobtail or with a loaded or un-loaded trailer on road surfaces withpoor traction (wet, icy, or snow cov-ered roads) or in heavy traffic. Theremay not be enough weight on the rearaxle to provide traction. Brakingcaused by the normal operation of theengine compression brake couldcause you to lose control of the vehi-cle, resulting in an injury accident.Make sure the engine brake is switch-ed "OFF" when bobtailing or with anunloaded trailer. Failure to comply mayresult in death, personal injury, equip-ment or property damage.

Remove Foot from Accelerator

MPH0

10

2030 40 50

60

7080

To reduce vehicle speed, put the enginebrake ON/OFF switch in the "ON" position.Remove your foot from the acceleratorpedal and clutch pedal. The engine brakeswill immediately begin to operate, slowingthe vehicle.For operation on dry and relatively flatsurfaces, when greater retarding power isnot required, put the two-position selectorswitch in the "LOW" position.For operation on dry pavement whenmaximum retarding power is required, putthe three-position selector switch in the"HI" position.


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Operating on Grades and DryPavement

WARNING

The engine brake is not intended asthe primary brake for the vehicle, noris it an emergency brake. The servicebrakes must be used in an emergency.Relying solely on the engine brake tostop the vehicle in an emergencycould cause an accident and lead topersonal injury. The engine brake onlyhelps the service brakes by usingpressure to slow the drive train. Youmust use the service brakes for quickor emergency stops. Failure to complymay result in death, personal injury,equipment or property damage.

"Control speed" is the speed at which theforces pushing a vehicle down a grade areequal to the forces holding it back.

Do Not Exceed Governed Engine Speed

OKOKRPM

2100 2300

1

2

33

4

5

R

RPM

1

2

3

44

5

RMPH

0

10

2030 40 50

60

7080

MPH0

10

2030 40 50

60

7080

WARNING

DO NOT use the engine brake whenoperating on road surfaces with poortraction (such as wet, icy, or snow cov-ered roads, or gravel). Retarders cancause the wheels to skid on a slipperysurface. You could lose control of thevehicle and/or jackknife if the wheelsbegin to skid, resulting in an accident.Failure to comply may result in death,personal injury, equipment or propertydamage.

CAUTION

The engine ECM maintains a record ofmaximum rpm. Exceeding the maxi-mum rpm will be considered driverabuse and will affect the engine war-ranty. See Engine Specifications.

WARNING

DO NOT use an exhaust brake whendriving bobtail or with an unloadedtrailer. There may not be enoughweight on the rear axle to provide trac-tion. This could cause a loss of controland jackknife resulting in an accident.Make sure the exhaust brake isswitched “OFF” when bobtailing orwith an unloaded trailer. Failure tocomply may result in property damage,personal injury, or death.


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CAUTION

Never exceed governed engine speedbecause engine damage can occur.Operating engine beyond the gov-erned speed causes additional strainon valve train and internal engine com-ponents. Operate the engine withingoverned engine speed.

NOTE

Once you have determined what thesafe speed is for your vehicle, operatethe engine brakes with the transmis-sion in the lowest gear that will notcause the engine speed to exceed therated engine speed. The optimumbraking power of the engine brakes isreached at rated engine speed. Cor-rect gear selection, therefore, is criti-cal.

The selector switch can be used to varybraking power as road conditions change.Vehicle service brakes must be used whenadditional braking power is required.

Slow Down Around Curves

25MPH

The engine brake is NOT intended as theprimary brake for the vehicle, nor is it anemergency brake. The engine brake onlyhelps the service brakes by using pressureto slow the drivetrain. Use the servicebrakes for quick stops.Braking Truck on Grade

WARNING

DO NOT drive with frequent or contin-uous use of the service brakes. Thiscan overheat the brakes and result inexcessive lining wear, increased stop-ping distances, possibly an accidentand may lead to personal injury. Be-fore descending a steep grade, shift toa lower gear, keep the vehicle speedlow, and avoid continuous applicationto the brakes. Failure to comply mayresult in death, personal injury, equip-ment or property damage.


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NOTE

The longer or steeper the hill, the moreimportant it is to use your enginebrakes. Make maximum use of yourengine brakes by gearing down andletting the engine brakes do the work.

Shift to a Lower Gear on Grade

RPM

1

2

3

4 R

55

OK

2100

RPM

1

2

3

44

5

RMPH

0

10

2030 40 50

60

7080

OK

MPH0

10

2030 40 50

60

7080

2100

If frequent use of the vehicle servicebrakes is required, it is recommended thata slower control speed be used byselecting a lower transmission gear.

Tips for Operation on Slick Roads

WARNING

To reduce the possibility of personalinjury or property damage, always al-low for extra distance between yourvehicle and other objects when usingthe service brakes or engine brakes onslick roads.

The operation of any vehicle is difficult topredict on slick roads. The first 10 to 15minutes of rainfall are the most dangerous,as road dirt and oil mixed with rain create avery slippery surface.

WARNING

DO NOT use any of the vehicle’s re-tarders in any situation that requiresan immediate stop and/or in situationsof poor traction (such as wet, icy orsnow covered roads). Trying to usethe retarder instead of the servicebrakes may cause a loss of vehiclecontrol, which may result in an acci-dent involving death or personal injury.

When driving on slick roads, start with the“ON/OFF” switch in the “OFF” position andthe two-position selector switch in the“LOW” position. If your tractor is equippedwith a twin-screw rear axle, position thepower divider switch in the “unlocked”position. Remove your foot from theaccelerator pedal to make sure the vehiclewill maintain traction with the retardingpower of the engine alone. If the vehicledrive wheels begin to skid or if there is afishtailing motion, DO NOT activate theengine brakes. If traction is maintainedusing the retarding power of the enginealone and more braking power is required,switch the two-position selector switch tothe “LOW” position and activate the enginebrakes by switching the “ON/OFF” switchto the “ON” position. If the vehicle’s drivewheels begin to skid or there is a fishtailingmotion, switch the “ON/OFF” switch to the“OFF” position. If traction is maintainedwhen the engine brakes are activated andmore braking power is required, move thetwo-position selector switch to the “HI”position. Again, if the vehicle has losttraction or if there is a fishtailing motion,switch the “ON/OFF” switch to the “OFF”position. DO NOT attempt to use theengine brakes in the “HI” position.


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Chapter 2 | ENGINE MAINTENANCEIn this Chapter:

Maintenance Requirements................................................................................................................ 32Maintenance Schedule Intervals.........................................................................................................35Preventative Maintenance Schedule...................................................................................................36Engine Specifications..........................................................................................................................38Engine Lubricating Oil Recommendations and Specifications............................................................40Engine Oil Capacities and Pressures..................................................................................................42Engine Lubrication and Filter Intervals................................................................................................43Cooling System Maintenance............................................................................................................. 46Engine Coolant Specifications............................................................................................................ 48Extended Life Coolant.........................................................................................................................49Fuel Recommendations...................................................................................................................... 50Warranty and the Use of Biodiesel Fuel..............................................................................................51Recommendations to Avoid Fuel Gelling............................................................................................ 52Fuel Filter Interval............................................................................................................................... 52

ENGINE MAINTENANCE -

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Diesel Exhaust Fluid Recommendations and Specifications.............................................................. 52Maintenance Procedures.................................................................................................................... 54Engine Identification............................................................................................................................69

ENGINE MAINTENANCE -

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MaintenanceRequirements

Engine MaintenancePACCAR recommends that the engine bemaintained according to the maintenanceschedule in this section.If the engine is operating in ambienttemperatures below 0°F (-18°C) or above100°F (38°C), perform maintenance atshorter intervals. Shorter maintenanceintervals are also required if the engine isoperated in a dusty environment or iffrequent stops are made.Some of these maintenance proceduresrequire special tools or must be completedby qualified personnel. Contact your localPACCAR authorized repair location fordetailed information.If your engine is equipped with acomponent or accessory not manufacturedby PACCAR Inc, refer to the componentmanufacturer's maintenancerecommendations.

WARNING

Never idle your vehicle for prolongedperiods of time if you sense that ex-haust fumes are entering the cab. In-vestigate the cause of the fumes andcorrect it as soon as possible. If thevehicle must be driven under theseconditions, drive only with the windowsopen. Failure to repair the source ofthe exhaust fumes may result in death,personal injury, equipment or propertydamage.

WARNING

Exhaust fumes from the engine con-tain carbon monoxide, a colorless andodorless gas. DO NOT breathe the en-gine exhaust gas. A poorly maintained,damaged or corroded exhaust systemcan allow carbon monoxide to enterthe cab. Entry of carbon monoxide intothe cab is also possible from other ve-hicles nearby. Failure to properly main-tain your vehicle could cause carbonmonoxide to enter the cab, resulting indeath or personal injury.

Cleaning the EngineWhen cleaning the engine, follow theinstructions from the vehiclemanufacturer's operator's manual andobserve all environmental protectionregulations.

CAUTION

DO NOT direct water onto electricalcomponents, plug connectors, seals orflexible hoses on the engine. Watermay enter the part causing electricaldamage or contaminating the engineoil. To prevent damage to engine com-ponents, keep the water moving at alltimes while cleaning the engine. Fail-ure to comply may result in equipmentdamage.

Daily or Refueling MaintenanceChecksVisual Inspection of EngineThis procedure should be followed as partof daily and refueling maintenance checks.

1. Check for any signs of fluid leaks.2. Ensure all access caps/covers are

installed and tight.

ENGINE MAINTENANCE - Maintenance Requirements

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3. Excessive oil, coolant or fuelconsumption

4. Loose or damaged parts5. Worn or damaged belts6. Worn or damaged wiring harnesses7. Any change in system appearance8. Odor of fuel9. Odor of electronic devices.10. When operating the engine, listen

for any unusual system noiseswhich can indicate service isrequired.

Daily Maintenance ItemsDaily maintenance tasks below must beperformed to properly maintain the engine:

Engine Fuel Filter / Water Separator onpage 33

Coolant Level on page 33

Chassis Fuel Filter / Water Separator onpage 33

Engine Oil Level on page 54

Cooling Fan on page 33 and CoolantLevel on page 33

Aftertreatment Exhaust Piping on page34

Air Intake Piping on page 34

How to Drain Moisture from Air Tank onpage 34

Diesel Exhaust Fluid on page 34

Crankcase Breather Tube - Check

Engine Fuel Filter / Water SeparatorAutomatic water drain, no maintenancerequired.

Chassis Fuel Filter / WaterSeparatorThis procedure should be followed as partof daily and refueling maintenance checks.

1. Drain trapped water (if equipped).

Cooling FanThis procedure should be followed as partof daily and refueling maintenance checks.

1. Inspect for cracks.2. Inspect for clearance to other

components.

Coolant LevelReplacement or top up coolant shouldhave the same antifreeze concentration

and corrosion inhibitor content as theoriginal coolant in the cooling system. Ifoperating in sub-freezing conditions, a60/40 mix of antifreeze and distilled watermay be substituted.Always dilute antifreeze to the correctconcentration based on freeze protectionbefore adding it to the cooling system.Adding or using 100% antifreeze in acooling system may result in coolingsystem plugging and overheatingproblems.This procedure should be followed as partof daily and refueling maintenance checks.Perform the following steps to check thecoolant level:

1. Check that vehicle is a on a levelsurface.

2. Ensure engine has not been run forseveral hours.


Y53-1183-1G1 (05/19) 33

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CAUTION

Due to thermal expansion the coolantlevel CANNOT be checked if the cool-ant is above ambient temperature orthe engine has not completely cooled.The coolant level indicated on awarmed system will be inaccurate andcan lead to low coolant conditions dur-ing cold-starts.

3. Check coolant level. It should bevisible through the clear plasticsurge tank.

4. Add coolant as necessary untilproper level is reached.

NOTE

The pressure cap (on the side of thesurge tank) should NEVER be re-moved. The fill cap (On the top, notthe side of the surge tank) is the cor-rect fill point.

Aftertreatment Exhaust PipingThis procedure should be followed as partof daily and refueling maintenance checks.

1. Inspect for cracks.

2. Inspect for clearance to othercomponents (i.e. electricalharnesses, etc.).

3. Inspect hose/pipe condition –deterioration/signs of leaking.

Air Intake PipingThis procedure should be followed as partof daily and refueling maintenance checks.

1. Inspect hose/pipe condition –deterioration/signs of leaking.

2. Inspect hose clamps for tightnessand pinching/cutting of hoses.

3. Inspect clearance to othercomponents.

4. Check air restriction gauge.

How to Drain Moisture from AirTank

1. Locate the various air tanks on thevehicle

2. On the air tank, look for a valve,typically on the bottom of the tank.

3. To eject moisture from the airsystem tanks, pull the line that isconnected to the moisture ejectionvalve.

4. Continue pulling until the air comesout free of water.

Diesel Exhaust FluidThis procedure should be followed as partof daily and refueling maintenance checks.

1. Check level of diesel exhaust fluid.

NOTE

It is recommended to top up DEFwhen refueling. See Engine Aftertreat-ment Systems Operator’s Manual forDEF information.


34 Y53-1183-1G1 (05/19)

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Maintenance ScheduleIntervals

PX-7 Maintenance Intervals

Maintenance Interval Miles Kilometers Hours Months

A 7,500 12,000 250 3

B 15,000 24,000 500 6

C 15,000 24,000 500 12 (1 year)

D 30,000 48,000 1,000 12 (1 year)

E 60,000 96,000 2,000 N/A

F 75,000 120,000 2,500 N/A

G 150,000 241,500 5,000 48 (4 years)

H 200,000 321,500 6,500 N/A

J 750,000 1,200,000 12,000 72 (6 years)

ENGINE MAINTENANCE - Maintenance Schedule Intervals

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Preventative MaintenanceScheduleList of recommended maintenance tasksand intervals that should be performed forPACCAR PX series engines.Perform maintenance at whichever intervaloccurs first. At Maintenance ScheduleIntervals, perform all previous maintenance

checks that are due for scheduledmaintenance.

NOTE

This maintenance schedule is for anormal duty cycle engine operation.Severe duty/vocational applicationswill need to adjust mileage, kilometer,

hour, or time interval based on the En-gine Lubrication and Filter Intervals.

NOTE

Due to the design of the crankcaseventilation module, routine service ofthis component is not required.

PX-7 Preventative Maintenance Schedule

Component 1 Maintenance Task Recommended PreventativeMaintenance Interval

A B C D E F G H J

Emissions Components Diesel Particulate Filter (DPF) - Clean •

Diesel Exhaust Fluid (DEF) Filter on page66 - Replace

•

Crankcase Breather Element - Replace •

Exhaust System - Check for Leaks •

Exhaust System - Replace Flex Pipe(s) •

ENGINE MAINTENANCE - Preventative Maintenance Schedule

36 Y53-1183-1G1 (05/19)

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A B C D E F G H J

Air System & Compressor Air Compressor on page 67 - Check •

Air Cleaner on page 67 •

Charge Air System Charge Air Piping on page 68 •

Charge Air Cooler on page 68 •

Charging / Cranking System Electrical Harness / Cables on page 68 •

Batteries, Cables, and Connections onpage 68

•

Cooling System Coolant/Antifreeze Condition on page 64 -Check

•

Radiator Hoses on page 65 •

Radiator Pressure Cap - Check •

Change Extended Life Coolant on page49

•

Crankshaft Crankshaft - Vibration Damper on page68 - Rubber Type Replace

•

Crankshaft - Vibration Damper on page68 - Viscous Type Check

•

ENGINE MAINTENANCE - Preventative Maintenance Schedule

Y53-1183-1G1 (05/19) 37

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A B C D E F G H J

Drive Belts Engine Belt Checks on page 65 •

Fan Belt Tensioner on page 65 •

Engine Lubrication Replace oil and filter Engine Lubrication and Filter Intervals onpage 43

Fuel System Fuel Filter on page 59 - Spin On TypeReplace

Fuel Filter Interval on page 52

Mounting Bolts Engine Mounting Bolts on page 68 •

Overhead Set (Valves) Adjust •

Engine Brake Assembly Adjust •

Engine Steam Clean Check •

1 Follow the manufacturers' recommended maintenance procedures for the starter, alternator, batteries, electrical components, exhaustbrake, charge-air cooler, radiator, air compressor, air cleaner, refrigerant compressor, and fan clutch.

Engine Specifications

ENGINE MAINTENANCE - Engine Specifications

38 Y53-1183-1G1 (05/19)

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PACCAR PX-7

Horsepower See the EPA label on top of the valvecover, towards the rear of the engine.

Firing Order 1-5-3-6-2-4

Crankshaft Rotation (viewed from front of engine) Clockwise

Displacement 409 CID (6.7 liters)

Bore and Stroke 4.21 in. × 4.88 in. (107 mm × 124 mm)

Approximate dry weight (without standard accessories) 1,151 lb (522 kg)

Idle Speed Minimum 700 rpm to maximum 900 rpm

Maximum overspeed capability (15 seconds maximum) 4,200 rpm

Minimum ambient temperature for unaided cold start -10°F (-12.2°C)

Typical engine cranking speed 120 rpm

Overhead adjustment Intake valve adjustment 0.010 in. (0.254 mm)

Exhaust valve adjustment 0.026 in. (0.660 mm)

Filter SpecificationsPACCAR is not responsible for problemscaused by non-genuine filters that do not

meet PACCAR performance or durabilityrequirements.Contact your local PACCAR authorizedrepair location for specific part numbers.

Fleetguard filters are standard on newPACCAR engines. PACCAR recommendstheir use.Fleetguard products meet all PACCAR teststandards to provide the quality filtration

ENGINE MAINTENANCE - Engine Specifications

Y53-1183-1G1 (05/19) 39

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necessary to achieve the engine's designlife. If other brands are substituted, thepurchaser should ensure the filterspecification meet or exceed theFleetguard specifications.

CAUTION

Use of non-genuine PACCAR oil filterscan cause severe engine damage.

Engine Lubricating OilRecommendations andSpecificationsA major factor in maintaining engineperformance and durability is the properuse of quality engine lubricating oils used

in conjunction with the appropriate oil drainand filter change intervals. Attempting toextend the oil and filter change intervalbeyond the manufacturer'srecommendations may decrease enginelife due to factors such as corrosion,deposits, and wear.See "Engine Lubrication and FilterIntervals" to determine which oil draininterval to use for an application.

NOTE

It is the operator’s responsibility to fol-low these recommendations to ensurethat the engine warranty is not affect-ed.

The primary PACCAR recommendation isfor the use of SAE 10W-30 API CK-4 orCJ-4 multigrade lubricating oil for normal

operation at ambient temperatures above5°F (-15°C). For ambient temperaturesbelow 5°F (-15°C) SAE 5W-30 may beused, provided it meets API CK-4 or CJ-4oil specifications and biodiesel or biodieselblended fuel is not used as fuel for theengine. Use of 0W-40 and 0W-30 syntheticoils that meet API CK-4 or CJ-4certification can be used in operationswhere the ambient temperature neverexceeds 32°F (0°C). 0W-40 and 0W-30 oilsdo not offer the same level of protectionagainst fuel dilution as do highermultigrade oils. Higher cylinder wear canbe experienced when using 0W-40 or0W-30 oils in high-load situations. Using amultigrade oil helps improve enginecranking in low-temperature conditions,reduces deposit formation and increasesengine durability. The use of a fueleconomy oil such as an API FA-4 oil is notapproved for this engine.

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Engine Oil Viscosity Chart

-40 -20 0 20 40 60 80 100 120 140

-40 -30 -20 -10 0 10 20 30 40 50 60

Temperature °F

Temperature °C

5W40

5W30

5W40 or 15W40110W3010W302

10W3010W3035W304

0W300W305

1. All seasons2. All seasons3. Winter conditions4. Winter conditions5. Arctic conditions

NOTE

Any of the oil weights listed in thechart above are acceptable to use aslong as the oil meets API CK-4/CJ-4oil specifications.

New Engine Break-In OilsPACCAR does not approve the use ofspecial “break-in” engine lubricating oils fornew or rebuilt PACCAR engines. It isrecommended to use the same lubricatingoil for engine break-in that will be usedduring normal operation.

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CAUTION

A sulfated ash limit of 1.85 percent hasbeen placed on all engine lubricatingoils recommended for use in PACCARengines. Higher ash oils can causevalve and/or piston damage and leadto excessive oil consumption. Failureto comply may result in equipmentdamage.

CAUTION

The use of a synthetic-base oil doesnot justify extended oil change inter-

vals. Extended oil change intervalscan decrease engine life due to factorssuch as corrosion, deposits, and wear.Failure to comply may result in equip-ment damage.

Additional information regarding lubricatingoil availability throughout the world isavailable in the EMA Lubricating Oils DataBook for Heavy-Duty Automotive andIndustrial Engines. The data book can beordered from: Engine ManufacturersAssociation, Two North LaSalle Street,Chicago, IL 60602; (312) 827-8733,(www.enginemanufacturers.org).

Aftermarket Oil Additive UsagePACCAR does not recommend the use ofaftermarket oil additives. Today's high-

quality engine lubricating oils are verysophisticated. Most oils already containprecise amounts of additives blended intothe lubricating oil to meet stringentperformance requirements.These oils meet performancecharacteristics that conform to the lubricantindustry standards and are sufficientprotection when used according to therecommendations. Aftermarket lubricatingoil additives are not necessary to enhanceengine oil performance and may in somecases reduce the oil's capability to protectthe engine.

Engine Oil Capacities andPressures

Engine Oil Capacity and Acceptable Pressures

PACCAR PX-7

Oil PressureAt low idle (minimum allowable) 10 psi (69 kPa)

At road speed (minimum allowable) 30 psi (207 kPa)

Oil regulating valve opening pressure range 65-75 psi (448-517 kPa)

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http://www.enginemanufacturers.org

Oil filter differential pressure to open bypass 50 psi (345 kPa)

Lubricating oil filter capacity 1 qt. (0.950 liters)

Maximum oil temperature 280°F (138°C)

Lubricating oil capacity ofstandard engine (U.S. qts.) Standard oil pan

Pan only 15 qts. (14.2 liters)

Total system 17.6 qts. (16.7 liters)

High to low (on dipstick) 2 qts. (1.9 liters)

Engine Lubrication andFilter IntervalsThe lubricating oil and lubricating oil filterinterval can be adjusted based onapplication, fuel consumption, grossvehicle weight, and idle time.Use the following questions to determinethe maximum recommended oil changeand filter change intervals in kilometers,miles, hours, or months, whichever comesfirst.Is the vehicle one of those listed below?

• Delivery truck• Fire truck or emergency vehicle

If "Yes," select the correct oil drain intervalfrom Table 1. If "No," is the vehicle one ofthose listed below?

• Refuse truck• Mixer truck or dump truck

If "Yes," select the correct oil drain intervalfrom Table 2. If "No," is the vehicle one ofthose listed below?If the vehicle type is not listed, select thecorrect oil drain interval from Table 3.Perform maintenance at whichever intervaloccurs first.

NOTE

If the equipment is using a remote oiltank in which oil is continuously circu-lated (not an oil make-up tank), the oilin the remote tank must be changedwhen the oil in the lubricating oil pan ischanged.

CAUTION

Extending the oil and filter change in-terval beyond the recommendationswill decrease the engine life due tofactors such as corrosion, deposits,and wear. Engine oil filters capture dirtand remove deposits from the oil toprolong the life of internal moving com-ponents. Follow the oil and filterchange intervals as recommended inthis section of the manual. Failure tocomply may result in equipment orproperty damage.

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Table 1: Maximum Oil Drain Interval

(A) Severe-Duty (If vehicle meets any of these conditions) (B) Normal-Duty (If vehicle meets both conditions)

Average fuel economy is less than 7 mpg (2.98 km/liter), or idletime is 40 percent or greater, or vehicle operates in dustyconditions, or gross vehicle weight is greater than 46,000 lb(20,865 kg).

Average fuel economy is greater than 7 mpg (2.98 km/liter) andgross vehicle weight is less than 46,000 lb (20,865 kg).

Vehicle uses the severe-duty oil drain interval (A) Vehicle uses the normal-duty oil drain interval (B)

If equipped with a 15 qt (14.2 liter) oil pan1: 9,000 mi (14,500 km),500 hours, 12 months, or 2,000 gallons (7,571 liters) of fuel,whichever comes first.

If equipped with a 15 qt (14.2 liter) oil pan1: 15,000 mi (24,000km), 500 hours, 12 months, or 2,000 gallons (7,571 liters) of fuel,whichever comes first.

If equipped with a 19 qt (18 liter) oil pan1: 12,000 mi (19,000 km),550 hours, 12 months, or 2,000 gallons (7,571 liters) of fuel,whichever comes first.

If equipped with an 19 qt (18 liter) oil pan1: 20,000 mi (32,000km), 550 hours, 12 months, or 2,000 gallons (7,571 liters) of fuel,whichever comes first.

Table 2: Oil Drain Interval

With 15 qt [14.2 liter] oil pan With 19 qt [18 liter] oil pan

Refusetruck, Mixeror Dumptruck

Miles Kilometers Hours Months Miles Kilometers Hours Months


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Below 10mph average

3,000 4,850 500 12 4,000 6,450 550 12

10 to 15 mphaverage

6,000 9,650 500 12 8,000 12,500 550 12

15 to 20 mphaverage

8,500 13,750 500 12 11,000 17,750 550 12

20 to 25 mphaverage

9,000 14,500 500 12 12,000 19,000 550 12

Above 25mph average

12,000 19,000 500 12 16,000 25,750 550 12

Table 3: Oil Drain Interval


Vehicle/Equipment

Miles Kilometers Hours Months Miles Kilometers Hours Months

Truck crane 9,000 14,500 500 12 12,000 19,000 550 12

Yard spotter 9,000 14,500 500 12 12,000 19,000 550 12

All others 9,000 14,500 500 12 12,000 19,000 550 12


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• Cummins Inc. bases the oil drainspecifications on duty cycle and oilcontamination. This contaminationoccurs in all engines, at varyingrates, regardless of the draininterval.

• Maintaining the correct oil and filterchange interval is a vital factor inpreserving the integrity of anengine. Lubricating oil filters mustbe changed when the oil ischanged.

NOTE

If the type/oil capacity of each lubricat-ing oil pan is not known:• Contact a PACCAR Inc. Author-

ized Repair Location• Determine the capacity of the oil

pan option for the engine beingserviced by using QuickServe™

Online and the engine serialnumber.

• Fill the lubricating oil pan to thesmallest oil pan capacity listedfor the engine being serviced.Then add 1 US qt (0.95 liters) ofoil at a time until it reaches the

high mark on the dipstick. Re-cord the number of quarts/litersadded, so the capacity is knownthe next time the oil is drained.

• For the latest information foryour engine, please refer toCummins QuickServe™ Online(quickserve.cummins.com) orcall 1-800-CUMMINS(1-800-286-6467)

Cooling SystemMaintenanceThe cooling system in your vehicle wasfactory filled with extended life coolant thatmeets or exceeds all ASTM D6210 andCaterpillar EC-1 requirements. PACCARrecommends only using a 50/50 mixture ofdistilled water and ELC when coolingsystem service is required. A 50/50 mixtureof ELC and distilled water will providefreeze protection down to –34°F (–37°C),which is adequate for most locations inNorth America. For extremely coldoperating conditions, a 60/40 mixture(coolant/water ratio) can be used to

provide freeze protection down to -62°F(-52°C).Unless otherwise optioned, factory fillcoolant is an ethylene glycol, nitritedorganic acid technology (NOAT) extendedlife coolant (ELC) formulation at a 50:50coolant-to-distilled water mixture. Thefactory fill exceeds ASTM D6210 andCaterpillar EC-1 requirements. Maintainingcoolant chemistry and freeze protection iscritical to engine and cooling systemcomponent health and longevity.

WARNING

Coolant is toxic. DO NOT get the fluidin eyes. If contact occurs, flood eyeswith large amounts of water for 15 mi-nutes. Avoid prolonged or repeatedcontact with skin. In case of contact,immediately wash skin with soap andwater. DO NOT take internally. If swal-lowed, seek immediate medical atten-tion. DO NOT induce vomiting. Failureto comply may result in death, person-al injury, equipment or property dam-age.

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CAUTION

The engine cooling system has veryspecific maintenance and inspectionrequirements. Failure to follow require-ments can damage the engine. Enginedamage can include but is not limitedto freezing, boiling, corrosion, pittedcylinder liners. This information isfound in the engine manufacturersowner’s manual. It is the owner’s re-sponsibility to follow all requirementslisted in the engine manufacturersowner’s manual.

NOTE

Coolant is harmful to the environment.Unused coolant must be stored as atoxic hazardous material in leakproofcontainers. Used coolant must beprocessed as industrial chemicalwaste. Please follow HAZMAT guide-lines with both used and unused cool-ants.

CAUTION

Use of non-genuine PACCAR coolantfilters can cause severe engine dam-age.

ConcentrationCheck the level of freeze/boiloverprotection, which is determined by theglycol concentration. Use a glycolrefractometer to determine glycol level.Add coolant to obtain the coolant/waterratio required to provide the protection youneed. A 50/50 mix of coolant and water isadequate for most applications. Forextremely cold operating conditions, theratio can be adjusted to a higherconcentration of coolant.

NOTE

Maximum recommended ELC concen-tration is 60% ELC and 40% water byvolume (a 60:40 coolant mixture). Theminimum recommended concentrationis 40%.

Glycol Concentration Level

Level

DesiredCoolant/ WaterRatio

FreezePoint °F

(°C)

RecommendedLevels

40% -12 (-24)

45% -23 (-31)

50% -34 (-37)

55% -50 (-46)

60% -62 (-52)

ConditionPerform a visual inspection of the coolant.It should have no cloudiness or floatingdebris. Determine the chemical inhibitorconcentration level by using an extendedlife coolant specific test kit or test strips.Inhibitor concentration level determinescorrosion protection. If you are concernedabout possible coolant quality,contamination, or mechanical problems,submit a coolant sample for analysis.Improper maintenance may cause coolant

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degradation and could result in damage tothe cooling system and enginecomponents. Consult your dealer orthe coolant manufacturer’s representativefor recommended extended life coolant testkits, test strips, and laboratory sampleprocedures.

Coolant ExtenderAdd extended life coolant extender, ifnecessary, according to the corrosioninhibitor concentration required. DO NOTadd coolant extender to nitrite-free coolant.

Checking Coolant LevelCheck the coolant level daily. See CoolantLevel on page 33.

CAUTION

When adding coolant, avoid mixing dif-ferent brands and formulations. If thecoolant is mixed with more than 25%of a different formulation (for example,mixing OAT and NOAT coolants), en-gine corrosion damage could occur. Ifmixing exceeds 25% of total systemvolume, it is recommended to flush

and refill the system completely withone type of coolant.

Cooling System Sealing Additivesand Soluble Oils

OK

1

1. Do not use soluble oils or sealingadditives.

CAUTION

The use of sealing additives or solubleoils in the cooling system can causedamage to the engine. These additivescan plug various areas of the radiator,EGR system and oil cooler. The plug-ging of the cooling system can hamperheat transfer, causing internal enginedamage. DO NOT use sealing addi-tives or soluble oils in the cooling sys-tem. The use of sealing additives can:

• Build up in coolant low-flowareas

• Plug the radiator and oil cooler• Damage the water pump seal• Damage heat transfer surfaces• Damage seals and hoses• Corrode brass and copperFailure to comply may result in equip-ment or property damage.

Engine CoolantSpecifications

Engine Coolant Specifications forPACCAR PX-7

Coolant Capacity(engine only)

3.0 gal (11.5 liters)

Standardmodulatingthermostat range

186-207°F(86-97°C)

Minimumrecommendedpressure cap

15 psi (103 kPa)

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Maximumrecommendedpressure cap

25 psi (172 kPa)

Minimumrecommendedoperatingtemperature

160°F (71°C)

Maximum allowedoperatingtemperature

225°F (107°C)

NOTE

Coolant volumes are dependent onchassis model and cab/sleeper heateroptions.

Extended Life CoolantPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

• Conduct coolant maintenancechecks including freeze point, pH,nitrite and carboxylate tests at least

twice annually to maintain engineprotection.

Nitrited Extended Life CoolantFor nitrited formulations (NOAT), a heavy-duty extended life coolant that meetsASTM D6210 and Caterpillar EC-1specifications must be used.Unless otherwise optioned, factory fillcoolant is an ethylene glycol, nitritedorganic acid technology (NOAT) extendedlife coolant (ELC) formulation at a 50:50coolant-to-distilled water mixture. Thefactory fill exceeds ASTM D6210 andCaterpillar EC-1 requirements. Maintainingcoolant chemistry and freeze protection iscritical to engine and cooling systemcomponent health and longevity.The change interval for extended-lifecoolant containing nitrite and molybdate is750,000 miles (1,200,000 km) or 12,000hours of on-road use (8 years or 15,000hours of off-highway use) on initial fill withno extender added. The change interval is1,000,000 miles (1,600,000 km)/20,000hours/8 years with an extender addition at500,000 miles (800,000 km)/10,000hours/4 years.

Nitrite-Free Extended Life CoolantNitrite-free organic acid technology coolant(OAT) may be used if it meets DAF 74002.The change interval for nitrite free coolantis 600,000 miles (1,000,000 km) or 6years, with no extender needed. DO NOTadd coolant extender to nitrite-free coolant.Follow the coolant supplier's drain/flush/fill/diluting percentages when servicing avehicle filled with nitrite-free coolant.Additional Recommendations:

• Antifreeze is essential for freeze,overheat, and corrosion protection.The use of supplemental coolantadditives (SCAs) is notrecommended for extended-lifecoolants.

Recommended Extended LifeCoolant SuppliersAuthorized PACCAR Engine dealer

®

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Fuel Recommendations

WARNING

The use of diesel fuel that has beenmixed with other fuels may cause anexplosion. DO NOT mix gasoline, alco-hol, or gasohol with diesel fuel. Makesure you know your fuel source anduse the recommended diesel fuel asindicated in this section of the manual.Failure to comply may result in death,personal injury, equipment or propertydamage.

CAUTION

Dirt or water in the fuel system cancause severe damage to both the fuelpump and the fuel injectors. Due to theprecise tolerances of diesel injectionsystems, it is extremely important thatthe fuel be kept clean and free of dirtor water. Know your fuel source andmake sure all steps are taken for dis-pensing or using clean fuel in your ve-

hicle. Failure to comply may result inequipment or property damage.

CAUTION

Unapproved fuel can reduce economyor possibly damage fuel system com-ponents. Unapproved fuels typically donot have enough lubricity elements inthe fuel to properly lubricate the fuelinjection system. Be sure you followthe fuel recommendations as indicatedin this section of the manual. Failure tocomply may result in equipment orproperty damage.

CAUTION

Using diesel fuels blended with lubri-cants may cause damage to your en-gine aftertreatment system. Service in-tervals for engine aftertreatment sys-tems will be reduced. DO NOT usediesel fuel blended with lubricating oilin engines equipped with an engine af-tertreatment system. Failure to comply

may result in equipment or propertydamage.

CAUTION

DO NOT use high-sulfur diesel fuel asit will damage the exhaust aftertreat-ment system. Also, the engine will notmeet emission regulations. Use onlyultra-low-sulfur diesel (ULSD) fuel.Failure to comply may result in equip-ment or property damage.

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CAUTION

If ultra-low-sulfur diesel (ULSD) fuel isnot used, the engine may not meetemission regulations, and damagemay occur to the engine aftertreatmentsystem. The use of high-sulfur dieselfuel will damage the engine aftertreat-ment system and impact the engineemission. ULSD fuel is required forcorrect operation of the aftertreatment.The engine has been optimized foruse with an engine aftertreatment sys-tem together with ULSD fuel to meetthe 2013 U.S. Environmental Protec-tion Agency regulations. Failure tocomply may result in equipment orproperty damage.

NOTE

PACCAR recommends that the cetanenumber of diesel fuel be a minimum of45 for engines that are expected to op-erate at temperatures below 32ºF(0ºC) and a minimum of 42 for engines

that are operated at temperaturesabove 32ºF (0ºC).

Using diesel fuel with a lower-than-recommended cetane number can causehard starting instability, and excessivewhite smoke. To maintain satisfactoryoperation at low ambient temperatures, it isimportant to specify diesel fuel of thecorrect cetane number.PACCAR requires all permissible fuels tohave adequate fuel lubricity. Lubricity canbe determined by ASTM, specificationD6079, ISO 12156, High FrequencyReciprocating Rig (HFRR) in which the fuelmust have a wear scar diameter of 0.02 in.(0.5 mm) or less.The use of Ultra-low-sulfur diesel (ULSD)fuel is required for this engine in order tomeet emission regulations and to preventdamage to the engine and exhaust system.The use of other grades of diesel fuelsother than ULSD fuel will be considered ause of incorrect fuel for the engine.PACCAR is not responsible for failurescaused by the use of incorrect fuel, oil orDEF or by water, dirt or other contaminantsin the fuel or DEF.

Warranty and the Use ofBiodiesel FuelPACCAR Inc. approves the use ofbiodiesel fuel blends up to 20 percent byvolume in diesel fuel providing that thefollowing conditions are met:

• The biodiesel used in the blendmeets ASTM Standard D6751 orEN 14214 specifications.

• The biodiesel used in the blend issourced from a BQ-9000Accredited Producer.

• The finished blend meets the fuelproperties of the ASTM StandardD975 (up to B5 blend) or D7467(B6 to B20 blend).

• If using B6-B20 the engine oil andoil filter are changed per themodified schedule. See the EnginePreventative MaintenanceSchedule.

• If using B6-B20 the fuel filter ischanged every 25,000 miles(40,000 km).

The use of approved biodiesel fuel doesnot affect the PACCAR engine warranty.Failures caused by the use of non-

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approved biodiesel fuels or other fueladditives that are of unacceptable qualityor do not meet specified industry standardsare not considered as defects of parts orworkmanship by PACCAR and thereforewill not be covered by the PACCAR enginewarranty.PACCAR recommends that customersintending to use biodiesel blends becomefamiliar with the additional handlingconsiderations of these fuels such asaging, metal compatibility and tendency toabsorb water. Please reference the fuelsupplier’s technical information or industryguidelines such as the American TruckingAssociation Truck Maintenance Councildocument RP 357.In particular, operators should be awarethat biodiesel blends are more prone tocold flow (gelling) and filter plugging issuescompared to conventional diesel fuel. Ifvehicles are expected to be operated intemperatures below freezing, care shouldbe taken to ensure that both the biodieselfuel used and the appropriate vehicle fuelsystem accessory heaters are utilized.Operators should also be aware thatbiodiesel energy content (by volume) islower than diesel which can reduce fueleconomy by up to two percent.

Recommendations toAvoid Fuel GellingTo avoid fuel gelling in cold weather:

• Use appropriate fuel grade/blendfor conditions

• Spec your vehicle with proper coldweather equipment (12V electricpre-heater, PACCAR fuel blendingvalve, fuel/coolant heater, 12V fuelline heaters and fuel tank heaters)

PACCAR does not recommend the use offuel additives, however, should a customerdecide there is a need for temporary use ofa winter fuel additive, PACCAR offers thefollowing guidance:

• Use an industry known, high qualityproduct (EPA-approved)

• Check the product label to ensure itis compatible with ultra-low sulfurdiesel fuel and aftertreatmentsystems

• Only use the additive for theminimum time needed

• Follow the additive manufacturer'sinstructions exactly

Fuel Filter IntervalReplace the fuel filters (pressure andsuction side) at the same interval as the oiland oil filter are changed. EngineLubrication and Filter Intervals on page 43

Diesel Exhaust FluidRecommendations andSpecifications

CAUTION

It is unlawful use Diesel Exhaust Fluid(DEF) that does not meet the specifi-cations provided or to operate the ve-hicle/equipment without DEF. Failureto comply may result in equipment orproperty damage.

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WARNING

Diesel Exhaust Fluid (DEF) containsurea. DO NOT get the substance inyour eyes. In case of contact, immedi-ately flush eyes with large amounts ofwater for a minimum of 15 minutes.DO NOT swallow internally. In theevent the diesel exhaust fluid is ingest-ed, contact a physician immediately.Reference the Materials Safety DataSheet (MSDS) for additional informa-tion. Failure to comply may result inpersonal injury.

CAUTION

Never attempt to create Diesel Ex-haust Fluid (DEF) by mixing agricultur-al grade urea with water. Agriculturalgrade urea does not meet the neces-sary specifications required and theengine aftertreatment system may bedamaged. Failure to comply may resultin equipment damage.

CAUTION

PACCAR Inc requires the use of DEFmeeting ISO 22241-1 (DIN 70070) spec-ifications. There is NO acceptable sub-stitute. Failure to use the correct DEFmay cause engine damage and/or voidthe warranty.

• Some locations may referencethe DIN 70070 standard. DEFspecification limits of this stand-ard are identical to ISO 22241-1.

PACCAR Inc is not responsible for failuresor damage resulting from what PACCARInc determines to be abuse or neglect,including but not limited to: operationwithout correctly specified DEF; lack ofmaintenance of the engine aftertreatmentsystem; improper storage, or shutdownpractices; unauthorized modifications ofthe engine and engine aftertreatmentsystem. PACCAR is also not responsiblefor failures caused by incorrect DEF or bywater, dirt or other contaminants in theDEF. Refer to your engine and vehicleoperator's manuals for maintenance,storage, and shutdown information.

For engines using SCR operating in theUnited States and Canada, it isrecommended that the DEF used becertified by the American PetroleumInstitute (API).

NOTE

To ensure the correct DEF is used,PACCAR Inc recommends the use ofTRP® CleanBlue Diesel Exhaust Fluidwhich is available in different quantityoptions from small to bulk containers.

DEF Availability• DEF is readily available at truck

stops and at all PACCAR Engine

ENGINE MAINTENANCE - Diesel Exhaust Fluid Recommendations and Specifications

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dealers. For assistance locatingDEF, contact your local PACCARauthorized repair location.

• If your vehicle is out of DEF andyou are unable to locate a sourceto purchase DEF, please contactthe vehicle OEM customer carecenter at the telephone numberprovided in the vehicle operator’smanual. The vehicle OEMcustomer care center will be able tocontact the nearest dealer locationto you and arrange for anemergency shipment of DEF toyour location 24 hours a day.

The following are other common namesused for Diesel Exhaust Fluid (DEF):

• AUS 32 (Aqueous Urea Solution32)

• AdBlue• NOx Reduction Agent• Catalyst Solution

Regardless of what the DEF is called, theDEF must meet the ISO 22241-1 (DIN70070) specifications.

Maintenance Procedures

Engine Oil LevelTo check engine oil level, park vehicle onlevel ground and wait 15 minutes aftershutting off engine. After the engine is shutoff it will take at least 15 minutes for all theengine oil to return to the sump.

NOTE

It takes approximately 15 minutes forall the oil to run into the sump whenthe engine is ‘warm.’ If the level ischecked immediately after switchingoff the engine, the dipstick will show alow oil level.

Make sure that the vehicle suspension issitting flat, both lengthwise and crosswise.Check this carefully on a vehicle with airsuspension.Engine coolant should be at or above theoperating temperature of 180°F (82°C).This procedure should be followed as partof routine maintenance checks.

1. Twist the dipstick handle to unlockit, then pull the dipstick out of theholder.

2. Wipe the dipstick clean with a lint-free cloth.

3. Reinsert the dipstick into theholder.

4. Remove the dipstick from theholder and check the oil level. Theoil level should always be betweenthe two marks on the dipstick.

5. Reinstall the dipstick and twist tolock it in place.

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Oil Level Indication on Dipstick

NOTE

On the engine oil dipstick, the differ-ence between the low oil level mark(2) and high oil level mark (1) is twoUS quarts (1.9 liters).

Engine Oil Dip Stick Markings

1

2

1. High oil level (1)2. Low oil level (2)

Topping Up the Engine OilIf checking the engine oil just after stoppingthe engine, wait 15 minutes for the oil todrain back into the oil pan before checkingthe fluid level.This procedure should be followed when oillevel is low and more oil needs to beadded.

1. Top up with oil, if necessary, via thefiller opening. Use the correctgrade in the correct quantity.

2. After topping up, wait one minuteand check the oil level again.

3. Reinstall the oil fill cap and twist tolock it in place.

Engine Oil FilterAlways use quality engine lubricating oils inconjunction with the appropriate oil drainand filter change intervals. Refer to the“Preventative Maintenance Schedule” forthe recommended oil and filter changeservice interval.

CAUTION

Use of non-genuine PACCAR oil filterscan cause severe engine damage.

Oil Filter Removal Preparation

CAUTION

Before beginning to remove and/ordisconnect any components, wait atleast 5 minutes after the key switch isturned OFF for the aftertreatment DEFdosing system to purge the DEF fromthe system. The DEF system purgesto prevent damage from freezing. Fail-ure to comply may result in equipmentor property damage.


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WARNING

Turn off the engine and place the igni-tion switch in the OFF position beforedisconnecting the battery clamps. DONOT place any tools or other materialson top of or close to the batteries. Thiscan cause a dangerous high currentshort circuit and, in the worst case, abattery explosion. Keep all objectsaway from the battery terminals. Al-ways break the contact between thebattery clamp and the negative termi-nal before working on the vehicle.Working on a vehicle while the batteryis connected may result in electrical in-jury or damage. Always disconnect thebattery at the negative terminal whenperforming service procedures. Failureto comply may result in death, person-al injury or equipment damage.

WARNING

Electrical shock hazard: Never discon-nect the battery clamp when the en-gine is running. Disconnecting the bat-tery clamps while the engine is running

may result in death, personal injury orequipment damage from electrical arc-ing or damage to electrical compo-nents.

1. Disconnect the chassis batterycable at the negative batteryterminal.

2. Place an oil collection pan directlyunder the oil filter.

Oil Filter Removal

CAUTION

DO NOT replace the engine oil filterand fuel filters at the same time. Doingso may lead to a "dry start" conditionwhere the engine starts before ade-quate oil pressure has reached all en-gine components, leading to extremeengine damage. Always remove andreplace one filter at a time before mov-ing on to the next.

Follow the procedure below after reading"Oil Filter Removal Preparation."

1. Use a clean rag to wipe off the oilfilter(s) and surrounding area to

ensure dirt does contaminate theoil filter module.

CAUTION

Dirt in the engine oil lubrication systemcan lead to significant damage to theengine. Failure to comply may result inequipment or property damage.

2. Unscrew the oil filter a few turns toallow the oil to drain from the filter.

3. Remove the oil filter from the filtermodule. Ensure there is no dirt orold oil on the sealing surface of theoil filter module.

4. Remove the O-ring from the screwcap.

WARNING

Lubricating oil can cause skin irritationor skin injury. To prevent skin injury,avoid unnecessary contact with the lu-bricating oil. Wear protective clothing,eye wear, and gloves when handlinglubricating oil. Failure to comply mayresult in personal injury.


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Oil Filter InstallationUse the following procedure to install oilfilters.

1. Install the new full-flow oil filterelement into the oil module.

Installing Full-flow Oil Filter

2. Lightly lubricate the new O-ring forthe lower cap with clean engine oil.

3. Install the new O-ring onto thelower cap.

4. Tighten the lower cap 1/4 turn tolock the full-flow oil filter in place.

5. Install the new centrifugal oil filterelement onto the centrifuge base.

Installing Centrifugal Oil Filter into Base

6. Mount the screw cap on thecentrifuge base.

7. Turn the screw capcounterclockwise to lock it.

Installing and Locking Cap

8. Lightly lubricate the new O-rings(1) with clean engine oil.


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9. Fit the new O-rings (1) onto thescrew cap (1) and onto thecentrifuge base (2).

Installing O-rings onto Screw Cap and Insert intoBase

1

2

10. Position the screw cap carefullyonto the oil module.

11. Tighten the screw cap by hand untilit reaches the end position.

12. Tighten the screw cap to 52 lb-ft(70 N·m). Use a hexagonal socket,

or box wrench, to avoid damagingthe oil filter cap.

After Replacing Engine Oil Filter(s)Follow the steps below after installing newoil filters:

1. Reconnect the chassis batterycable at the negative batteryterminal. See "Oil Filter RemovalPreparation."

2. Add SAE-approved CK-4/CJ-4engine oil to the maximum levelmarked on the dipstick. If theengine is running a different weightof oil, be sure to top-off the engineoil with the same brand andviscosity of oil.

3. Make sure that all electricalcomponents are switched OFF andthe vehicle's transmission is in theneutral gear position before startingthe engine.

4. Start and run the engine at idlespeed for at least one minute toallow oil to reach all necessarycomponents. Check for oil leaks.

CAUTION

Increasing the engine speed directlyafter maintenance or repairs to the lu-brication system may cause damageto various engine components.

CAUTION

The red oil pressure warning in the in-strument panel should disappear with-in ten seconds of the engine starting. Ifnot, shut the engine OFF and investi-gate the problem. Failure to do so maycause damage to various engine com-ponents.

5. Remove oil collection pan anddispose of any spillage properly.

6. Shut down the engine and allow atleast 15 minutes for the oil to drainback into the oil pan. Check the oillevel and top up as necessary. See"Engine Oil Level."


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Fuel FilterPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

WARNING

When removing the fuel filter, a quanti-ty of fuel will escape. DO NOT smokeor allow an open flame in close prox-imity. Failure to do so could ignite afire or cause an explosion which couldresult in serious injury to you and/orbystanders. Failure to comply may re-sult in death, personal injury, equip-ment or property damage.

CAUTION

Replace engine and chassis-mountedfuel filters with parts of the same partnumber. PACCAR periodicallychanges its filter design, and filters ofdifferent part numbers are not inter-changeable. Use of incorrect filter partnumbers or non-genuine filters can re-sult in low pressure fuel fault codesand/or severe engine damage. Con-tact a Kenworth or Peterbilt dealer to

verify the correct fuel filter part num-bers.

NOTE

The fuel filter and the hand pump arelocated on the left-hand side of the en-gine, as viewed from the driver's seat.

NOTE

Use of poor quality fuel may requiremore frequent fuel filter element serv-ice.

DescriptionThe fuel filter/water separator moduleprovides fine-particle filtration, waterseparation, water-in-fuel sensing,automatic water draining, lifetimepurification of drained water with acharcoal filter, 12V preheating and systemmanual priming in a singular easy toservice module.Replace the suction side and the pressureside fuel filters at the same time. It isrecommended to replace the fuel filters atthe same interval as the oil and oil filter are

changed. If the oil drain interval being usedis greater than 15,000 mi (24,000 km), asdetermined by the Engine Lubrication andFilter Intervals, the fuel filter change can beextended until the oil drain interval.

NOTE

The engine and fuel module should beoperated in cold climates with accepta-ble cold climate fuel blends which no-ticeably reduces wax gelling in the fuelfilter cartridge. The fuel module in-cludes a 12V pre-heater to supportpre-heating of the fuel for initial start-up in mild climates. Failure to operatewith acceptable cold climate fuel mayresult in insufficient fuel flow to the fuelinjection system.

BiodieselFor information on alternative fuels, suchas biodiesel, and additional information forfuel recommendations and specificationsrefer to "Fuels for Cummins® Engines,"Bulletin 3379001.For information on alternative fuels, suchas biodiesel, and additional information forfuel recommendations and specifications,


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see Warranty and the Use of BiodieselFuel on page 51.

Fuel Filter RemovalFollow the steps below to remove the fuelfilter:

CAUTION

DO NOT replace the engine oil filterand fuel filters at the same time. Doingso may lead to a "dry start" conditionwhere the engine starts before ade-quate oil pressure has reached all en-gine components, leading to extremeengine damage. Always remove andreplace one filter at a time before mov-ing on to the next.

Fuel Module

4

1

2

3

1. Fuel Filter Cap2. Fuel Filter3. Manual Priming Pump4. Fuel Filter Housing1. Clean the fuel filter cap and

surrounding area to ensure dirtdoes not fall into the fuel module.

CAUTION

Dirt in the fuel system can lead to sig-nificant damage to the fuel system.Failure to comply may result in equip-ment or property damage.

2. Loosen the fuel tank cap to relieveany pressure in the fuel tank.

3. Remove the fuel filter cap byrotating it counter-clockwise with awrench, automatic draining of fuelwill be initiated, wait 5 minutes forcomplete fuel draining to preventfuel from leaking or dripping on thestarter motor.

NOTE

The fuel filter cartridge is a disposablefilter and must not be cleaned andreused. Dispose of the filter as chemi-cal waste.

4. Remove the fuel filter cartridge.

Fuel Filter InstallationFollow the steps below to install a new fuelfilter:


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1. Verify the sealing O-ring that issupplied with the filter kit isinstalled on the fuel filter cap andlightly coat the O-ring with fuel.

2. Install the new fuel filter cartridge tothe cap, then insert into the fuelmodule.

NOTE

Depending on the vehicle’s fuel sys-tem configuration the fuel filter housingmay not completely drain of fuel. If thisis the case, take care when installingthe new filter as this may cause fuel tospill from the filter housing.

3. Tighten the fuel filter cap byrotating it clockwise until the filtercap O-ring makes contact with thefuel module. Then tighten the filtercap to 30 lb-ft ± 6 (40 N·m ± 8) asspecified on the filter cap.

4. If installing a new fuel filter on aPX-7, loosen the fuel priming pumpknob by rotating it counter-clockwise.

NOTE

The PX-9 uses an electric primingpump. If installing a new fuel filter on aPX-9 engine first vent the fuel systemat the quick-disconnect fitting at thepressure side filter head inlet. The ventoverflow may be routed back to thefuel tank, or, into a vented container.Cycle the ignition switch to the ON po-sition every 2 minutes (to power theelectric lift pump) until fuel appears inthe chassis-mounted fuel filter housingand a solid stream of fuel flows out ofthe vent., then skip to Step 6.

5. Operate the priming pump bymoving the knob in and out for 150seconds. During this time thepumping resistance will increasebut the full time is required to fullyprime the fuel system. Then tightenthe knob by rotating it clockwise.

CAUTION

Operate priming pump at a maximumrate of 30 strokes per minute to pre-vent damage to pump.

6. Check for leakage at the fuel filtercap. Tighten if necessary.

WARNING

Check the fuel filter for signs of leak-age. DO NOT smoke or allow an openflame in close proximity. Failure to doso could ignite a fire or cause an ex-plosion which could result in seriousinjury to you and/or bystanders. Fail-ure to comply may result in death, per-sonal injury, equipment or propertydamage.

7. Start the engine and allow it to idlefor several minutes. Note that itcould take up to 15 seconds ofcranking for the engine to start. Ifthe starter is engaged for longerthan 20 seconds without starting,additional priming pump actuationmay be necessary.


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CAUTION

If the engine is cranked excessivelyStarter Protection will be triggered andstarter engagement will be restrictedfor 10 minutes.

8. Check the system for leakage whileidling. Then turn the engine off andcheck the system again forleakage.

Priming the Fuel SystemTo start the engine after the fuel tank hasrun dry, or after the fuel system service hasbeen performed, follow the steps below:

CAUTION

The following instructions should beused in emergency situations whenthe fuel tank has run dry, or after thefuel system service has been per-formed. Failure to follow the startinginstructions below may damage thestarter motor.

1. Loosen the fuel primer pump knobby rotating it counter-clockwise.

2. If your vehicle is equipped with aPACCAR fuel blending valve, rotatethe blending valve to the PRIME(closed) position (see "PACCARFuel Blending Valve Position")before starting the primingprocedure.

3. Operate the priming pump bymoving the knob in and out for 150seconds. During this time thepumping resistance will increase,indicating air is being bled from thesystem, but the full time is requiredto fully prime the fuel system.

CAUTION

Operate priming pump at a maximumrate of 30 strokes per minute to pre-vent damage to pump.

4. Check for leakage at the fuel filtercap. Tighten if necessary.

WARNING

Check the fuel filter for signs of leak-age. DO NOT smoke or allow an openflame in close proximity. Failure to doso could ignite a fire or cause an ex-

plosion which could result in seriousinjury to you and/or bystanders. Fail-ure to comply may result in death, per-sonal injury, equipment or propertydamage.

5. Start the engine and allow it to idlefor 2 to 3 minutes. Note that itcould take up to 15 seconds ofcranking for the engine to start. Ifthe starter is engaged for longerthan 20 seconds without starting,additional priming pump actuationmay be necessary.

CAUTION

If the engine is cranked excessivelyStarter Protection will be triggered andstarter engagement will be restrictedfor 10 minutes.

NOTE

Allowing the engine to idle for severalminutes with the PACCAR fuel blend-ing valve in the prime (closed) positionassists in purging air from the fuel sys-tem.


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6. Check the system for leakage whileidling. Then turn the engine OFFand check the system again forleakage.

7. If the engine does not start withinthis time, repeat steps two andthree until the engine starts. If theengine still does not start, allow thestarter to cool down for at least 5minutes before repeating theprocedure.

PACCAR Fuel Blending Valve Position

12

1. Run (open)2. Prime (closed)

NOTE

If you just finished priming the secon-dary (engine-mounted) fuel filter, followthe same procedure to replace andprime the primary (chassis-mounted)fuel filter.

8. If equipped with a PACCAR fuelblending valve, turn the valve to theRUN (open) position.

NOTE

Failure to return the PACCAR fuelblending valve to the RUN (open) posi-tion will prevent fuel recirculation andheating.

WARNING

DO NOT loosen any fuel line fittings inorder to bleed the fuel system of air.The system is under high pressurewhich, when relieved, could causedeath, personal injury, equipment orproperty damage.

Cooling SystemYour engine may be equipped with acoolant filter designed to capture andremove harmful deposits from the coolingsystem to help prolong system life. Refer tothe Preventative Maintenance Schedule forthe recommended coolant filter changeservice interval.

WARNING

Do not remove the surge tank fill capon a hot engine. It can cause scaldingcoolant to spray out and you could beburned. If the engine has been operat-ed within the last 30 minutes, be verycareful in removing the radiator cap.Protect face, hands, and arms againstescaping fluid and steam by coveringthe cap with a large, thick rag. Failureto comply may result in death, person-al injury, equipment or property dam-age


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WARNING

Handle coolant and antifreeze careful-ly. Ethylene glycol antifreeze is poison-ous. Store in original fluid containeronly, and always keep out of the reachof children. Never remove the filler cap(vertically mounted) on the surge tankwhile the engine is still hot. Wait untilthe coolant temperature is below120°F (50°C). Scalding steam and flu-id under pressure may escape andcause serious personal injuries. Thepressure cap (horizontally mounted)on the surge tank should never beopened. Failure to comply may resultin death, personal injury, equipment orproperty damage.

Coolant/Antifreeze ConditionPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

NOTE

Test the engine coolant at least twiceper year to determine if the coolantmust be replaced. If it is determinedthat the coolant should be replaced,make sure to flush the coolant system.Contact a PACCAR® Authorized Re-pair Location for flushing the coolantsystem.

1. Check the following anti-freezeconditions:

• Coolant level• Freeze point• pH level• Nitrite level• Carboxylate level

Checking Coolant ConditionTo ensure the Extended Life Coolant (ELC)in your vehicle always provides maximumprotection, perform the following tests:

1. Check the coolant color at everymaintenance interval. Itshould have no cloudiness, floatingdebris, or oils.

2. Test the freeze point at least twicea year. A refractometer or teststrips can be used to measure theprotection level.

3. Determine the pH and chemicalinhibitor concentration level byusing an ELC-specific test kit ortest strips.

4. Keep the cooling system full bytopping-up using ELC pre-diluted toa 50/50 blend, unless a differentratio of water/antifreeze has beensubstituted (depending onoperating conditions).


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NOTE

Inhibitor concentration level deter-mines corrosion protection. If you areconcerned about possible coolantquality, contamination, or mechanicalproblems, submit a coolant sample toyour dealer for analysis. Impropermaintenance may cause coolant deg-radation and could result in damage tothe cooling system and engine compo-nents. Consult your dealer or the cool-ant manufacturer's representative forrecommended extended life coolanttest kits, test strips, and laboratorysample procedures.

Radiator HosesPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Check the following radiator hoseconditions:

• Deterioration/signs of leaking• Hose clamp torque

Drive Belts

NOTE

Always fit the same type of belts asthe ones replaced.

Engine Belt ChecksPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Inspect the engine drive belts forthe following conditions:

• Condition, signs of wear/deterioration

• Alignment

Fan Belt TensionerPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Check and correct fan belttensioner.

• Mounting bolt torque• Tensioner maintains proper belt

tension

Poly V-belt and Fan Drive BeltRemovalPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Disconnect the electrical groundwire from the battery.

2. Reach between the fan blades andremove the fan blade mountingbolts using a 9/16 in. socket toremove the mounting nuts.

3. Place a flex-bar with a 15 mmsocket on the fastener securing theautomatic belt tensioner's roller, asshown in the image.

4. Rotate the flex-bar as shown in thediagram to relieve belt tension.

5. With the belt tensioner pressurerelieved, remove the poly V-beltfrom the pulleys.

• The tensioner can betemporarily blocked with a0.16-0.2 in. (4-5 mm) thick pin(bore). This facilitates removaland installation of the poly V-belt.

6. After removing the belt, carefullyallow the belt tensioner to springback to the stop (if it had not beentemporarily blocked).


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7. Inspect the pulleys for damage,rust, and grease deposits. Clean orreplace as necessary.

Poly V-belt and Fan Drive BeltInstallationFollow the steps below to install the poly V-belt and fan drive belts:

1. Place the new poly V-belt over thepulleys, making certain the beltfalls into all the belt pulley grooves.

NOTE

When installing the belts DO NOTwrap belt around the tensioner until af-

ter the belt has been wrapped aroundall other pulleys and idlers.

2. After installing the belt, carefullyallow the belt tensioner to springback to its normal position. If thetensioner had been temporarilyblocked, relieve tensioner pressureenough to remove the locking pin,then allow the tensioner to springback to its normal position.

NOTE

DO NOT reuse nylon patch lock nuts.Replace with new lock nuts when rein-stalling parts.

3. Reinstall fan blade using fan bladebolts and new 9/16 in. nylon patchlock nuts.

4. Reconnect the electrical groundwire to the battery.

Diesel Exhaust Fluid (DEF) FilterPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.


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Medium and Large DEF Tank Small DEF Tank Filter Access

1. Replace the aftertreatment DEFdosing unit (DEF module) filteraccording to the maintenanceschedule.

2. From the bottom of the tank,remove the cover plate byremoving the various fastenersholding it on, then allow the coverplate to drop down.

Air CompressorPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Check and correct for carbonbuildup

Air Intake SystemAir CleanerPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Check and correct for restriction:• Service filter element when air

cleaner restriction gauge


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(option) locks in the extremehigh position.

• Check hose/pipe condition –deterioration/ signs of leaking.

• Check hose clamp torque.

Charge Air PipingPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Check and correct the followingcharge air piping components:

• Hose/pipe condition –deterioration/signs of leaking

• Hose clamps for tightness• Clearance to other components

Charge Air CoolerPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Check and correct the followingcomponents of the charge aircooler:

• Cracked tubes or header• Clogged fins/tubes• Hose/pipe condition –

deterioration/signs of leaking• Hose clamp torque

Charging - Cranking SystemElectrical Harness / CablesPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Check the following electricalcomponents:

• Inspect for loose connections,corrosion, chafing, and brokenretention clips

Batteries, Cables, and ConnectionsPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. Check the following electricalcomponents:

• Condition – electrolyte level,cracks, signs of leaking,overcharging

• Hold-downs – tightness• Battery box mounting bolt –

torque

Crankshaft - Vibration DamperPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule.

1. If equipped with a rubber-typecrankshaft damper, perform thefollowing checks of vibrationdamper:

• Inspect for cracks, nicks,leakage

• Check fastener torque

Engine Mounting BoltsPerform these maintenance proceduresaccording to the Preventative MaintenanceSchedule. Check for the following:

1. Inspect both mount and legfasteners. Check for loose orbroken bolts. Replace asnecessary.

2. Check mount and leg for fractures,breaks or deformation. Replace asnecessary.

3. Check for complete insertion ofmotor mount. Replace asnecessary.


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CAUTION

DO NOT re-torque or reuse existingflange head bolts. These bolts are fac-tory set to the specified torque. If boltsare loose or damaged, they must bereplaced with the new bolts. Failure tocomply may result in equipment orproperty damage.

Engine Identification

PX Engine EPA LabelThe EPA label provides important detailsabout the engine. This label is located on

top of the engine valve cover (PX-7) or onthe front timing gear cover (PX-9). Theengine EPA label must not be changedunless approved by PACCAR.PX-7 EPA Label Location

Catal

yst N

o.

Engine IdentificationThe engine dataplate contains informationspecific to that engine. The engine serialnumber (ESN) and control parts list (CPL)provide information for service andordering parts.

ENGINE MAINTENANCE - Engine Identification

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Catalyst No.

1

6 7

2 3 4 5

8 9Have the following engine data available when communicating with a PACCAR Authorized Repair Location:

1. Date of manufacture2. Engine serial number (ESN)3. Engine model information4. Fuel rate5. Control parts list (CPL)6. Idle speed7. Valve lash8. Advertised horsepower and rpm rating9. Engine displacement


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1. Data plate2. Engine serial number

If the engine dataplate (1) is NOT legible,the ESN (2) can be found on the engineblock, on top of the lubricating oil coolerhousing. Additional engine information ison the electronic control module (ECM)dataplate.

Fuel Injection Pump DataplateThe Bosch fuel injection pump dataplate islocated on the fuel pump.

Bosch data plate includes:• Pump serial number• PACCAR part number• Factory code• Bosch part number• Date code

Engine Control Module Dataplate

NOTE

Not all engines have ECM data plates.

The engine control module (ECM)dataplate is located on the front of theECM. The following information is found onthe engine control module dataplate:

• ECM part number (PN)• ECM serial number (SN)• ECM date code (DC)• Engine serial number (ESN)• ECM Code: identifies the software

in the ECM.

NOTE

The presence of an ECM data platedepends on the manufacturing plantand the date the engine was manufac-tured. If an ECM data plate was not in-stalled by the manufacturing plant, cal-ibration data can be found on the en-gine data plate.


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PACCAR Engine NomenclatureThe PACCAR engine nomenclatureprovides the following information:

PX-7 200 6.7 liter

1

2

3

1. Displacement2. Horsepower rating3. Engine model

Air Compressor Dataplate

NOTE

Not all engines are equipped with anair compressor.

The air compressor dataplate is typicallylocated on the side of the air compressor.The dataplate contains the followinginformation to assist in servicing orreplacement:

• Part number• Serial number

• Date code

Variable Geometry TurbochargerDataplate

The Holset® variable geometryturbocharger (VGT) dataplate is located onthe turbocharger inlet compressor housing.The dataplate contains the followinginformation to assist in servicing orreplacement:

• Assembly part number• Serial number• Customer number• Model number

NOTE

The electronic actuator on the VGT isa serviceable component and has aseparate data plate that contains infor-mation to assist in servicing or re-placement.


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Chapter 3 | ENGINE WARRANTYIn this Chapter:

United States and Canada Engine Warranty...................................................................................... 75

ENGINE WARRANTY -

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United States and CanadaEngine Warranty

Engine Warranty for StandardApplicationsProducts WarrantedThis warranty applies to new PACCARPX-7 engines sold and used in the UnitedStates1 or Canada and operated in on-highway applications with one exception –there is different warranty coverage forengines used in the fire apparatus truckapplications.The PACCAR PX-7 engine is warranteddirectly to the first purchaser or first lesseeby PACCAR.

Base Engine WarrantyThis warranty covers any failures of theengine which result, under normal use andservice, from a defect in material or factoryworkmanship (warrantable failure). Thiscoverage begins on the date of deliveryand ends two years or 250,000 miles

(400,000 kilometers) or 6,250 hours,whichever occurs first, after the date ofdelivery of the engine to the first purchaseror first lessee.Engine aftertreatment componentsincluded in the PACCAR critical parts list(CPL) and marked with a PACCAR partnumber are covered under base enginewarranty.Additional coverage is outlined in Emissions Warranty on page 80.

PACCAR and OwnerResponsibilitiesPACCAR ResponsibilitiesPACCAR will pay for all parts and laborneeded to repair the damage to the engineresulting from a warrantable failure.PACCAR will pay for the lubricating oil,antifreeze, filter elements, belts, hoses,and other maintenance items that are notreusable due to the warrantable failure.PACCAR will pay for reasonable laborcosts for engine removal and reinstallationwhen necessary to repair a warrantablefailure.

PACCAR will pay during the base enginewarranty period of two years or 250,000miles (400,000 kilometers) or 6,250 hours,whichever occurs first: reasonable costs fortowing a vehicle disabled by a warrantablefailure to the nearest authorized repairlocation. In lieu of the towing expense andin its sole discretion, PACCAR may payreasonable costs for a mechanic to travelto and from the location of the vehiclewhen an engine repair is performed at thesite of the failure.

Owner ResponsibilitiesThe owner is responsible for the operationand maintenance of the engine asspecified in the applicable PACCAROperator’s Manual. The owner is alsoresponsible for providing proof that allrecommended maintenance has beenperformed.Before the expiration of the applicablewarranty, the owner must notify a PACCARauthorized engine dealer or an authorizedCummins Distributor of any warrantablefailure and make the engine available forrepair by such facility. The warrantablefailure must be brought to the attention of a

1 United States includes American Samoa, the Commonwealth of Northern Mariana Islands, Guam, Puerto Rico, and the U.S. VirginIslands.

ENGINE WARRANTY - United States and Canada Engine Warranty

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PACCAR authorized engine dealer within30 days of discovery. Except for enginesdisabled by a warrantable failure, ownermust also deliver the engine to the repairfacility.The owner is responsible for the cost oflubricating oil, antifreeze, filter elementsand other maintenance items providedduring warranty repairs unless such itemsare not reusable due to the warrantablefailure. The owner is responsible forcommunication expenses, meals, lodgingand similar costs incurred as a result of awarrantable failure.The owner is responsible for non-enginerepairs and for “downtime” expenses,cargo damage, fines, all applicable taxes,all business costs and other lossesresulting from a warrantable failure.The owner is responsible for non-enginerepairs and for “downtime” expenses,cargo damage, fines, all applicable taxes,all business costs and other lossesresulting from a warrantable failure.

Warranty Limitations - StandardApplicationsYour sole and exclusive remedy againstPACCAR and the selling dealer arisingfrom your purchase and use of this engineis limited to the repair or replacement of

“warrantable failures” at authorized UnitedStates and Canadian PACCAR enginedealers or an authorized CumminsDistributor, or an authorized PACCARengine facility where applicable, subject toPACCAR’s time, mileage, and hourlimitations of the engine warranty. Themaximum time, mileage and hourlimitations of the engine warranty beginrunning on the date of delivery to the firstpurchaser or first lessee. The accruedtime, mileage, or hours is calculated whenthe engine is brought into an authorizeddealer for correction of warrantablefailures.Failures, other than those resulting fromdefects in material or factory workmanship,are not covered by this warranty. PACCARis not responsible for failures or damageresulting from what PACCAR determines tobe abuse or neglect, including, but notlimited to: damage due to accident;operation without adequate coolants orlubricants; overfueling; overspeeding; lackof maintenance of lubricating, cooling orintake systems; improper storage, starting,warm-up, run-in or shutdown practices;failure to perform regeneration in a timelymanner; unauthorized modifications of theengine. PACCAR is also not responsiblefor failures caused by incorrect oil or fuel or

diesel exhaust fluid or by water, dirt orother contaminants in the fuel, oil, or dieselexhaust fluid. Failure of replacement partsused in repairs due to the above non-warrantable conditions is not warrantable.This warranty does not apply toaccessories supplied by the vehicle originalequipment manufacturer (OEM) which arecovered by the OEM vehicle warranty.Failures resulting in excessive oilconsumption are covered for the durationof the coverage or 250,000 miles (400,000kilometers) or 6,250 hours from the date ofdelivery of the engine to the first purchaseror first lessee, whichever occurs first.Before a claim for excessive oilconsumption will be considered, the ownermust submit adequate documentation toshow that consumption exceeds PACCARpublished standards.Failures of belts and hoses supplied byPACCAR are covered for the first year fromthe date of delivery of the engine to the firstpurchaser or first lessee.Parts used to repair a warrantable failuremay be new parts, approved rebuilt parts,or repaired parts. PACCAR is notresponsible for failures resulting from theuse of parts not approved by PACCAR. Anew approved or rebuilt part used to repaira warrantable failure assumes the identity


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of the part it replaced and is entitled to theremaining coverage hereunder.PACCAR is not responsible for damage orloss resulting from engine horsepower/torque upgrades.PACCAR reserves the right to interrogateelectronic control module (ECM) data forpurposes of failure analysis.PACCAR does not warrant antifreeze,lubricants, filters, filter elements, or anyother part which is considered amaintenance item. PACCAR does notwarrant services to remove ash from theDPF either at or before a regular serviceinterval as indicated in the maintenanceschedule or when the system indicates thatthe DPF requires cleaning unless theservice is required as part of a warrantablerepair.PACCAR DOES NOT COVER WEAR ORWEAROUT OF COVERED PARTS.THIS WARRANTY AND THE EMISSIONWARRANTY SET FORTH HEREINAFTERARE THE SOLE WARRANTIES MADEBY PACCAR IN REGARD TO THESEENGINES.THIS LIMITED WARRANTY IS THE SOLEWARRANTY MADE BY PACCAR AND

THE SELLING DEALER. EXCEPT FORTHE ABOVE LIMITED WARRANTY,PACCAR AND THE SELLING DEALERMAKE NO OTHER WARRANTIES,EXPRESS OR IMPLIED. PACCAR ANDTHE SELLING DEALER EXPRESSLYDISCLAIM ANY WARRANTY OFMERCHANTABILITY OR WARRANTY OFFITNESS FOR A PARTICULARPURPOSE.PACCAR AND THE SELLING DEALERSHALL NOT BE LIABLE FORINCIDENTAL OR CONSEQUENTIALDAMAGES INCLUDING, BUT NOTLIMITED TO: LOSS OF INCOME ORLOST PROFITS; ENGINE OR VEHICLEDOWNTIME; THIRD PARTY DAMAGE,INCLUDING DAMAGE OR LOSS TOOTHER ENGINES, VEHICLES ORPROPERTY, ATTACHMENTS, TRAILERSAND CARGO; LOSS OR DAMAGE TOPERSONAL CONTENTS;COMMUNICATION EXPENSES;LODGING AND/OR MEAL EXPENSES;FINES; APPLICABLE TAXES ORBUSINESS COSTS OR LOSSES;ATTORNEYS’ FEES; AND ANY

LIABILITY YOU MAY HAVE IN RESPECTTO ANY OTHER PERSON OR ENTITY.This warranty gives you specific legalrights, and you may also have other rightswhich vary from state to state.

Engine Warranty for Fire ApparatusTruck ApplicationsThis warranty applies to new PACCARPX-7 engines sold and used in the UnitedStates2 or Canada and operated in fireapparatus truck applications.The PACCAR PX-7 engine is warranteddirectly to the first purchaser or first lesseeby PACCAR.

Base Engine WarrantyThe base engine warranty covers anyfailures of the engine which result, undernormal use and service, from a defect inmaterial or factory workmanship(warrantable failure). This coverage beginson the date of delivery to the firstpurchaser or first lessee and ends after fiveyears or 100,000 miles (160,000kilometers), whichever occurs first.



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Engine aftertreatment componentsincluded in the PACCAR critical parts list(CPL) and marked with a PACCAR partnumber are covered under base enginewarranty.

PACCAR and OwnerResponsibilitiesPACCAR ResponsibilitiesPACCAR will pay for all parts and laborneeded to repair the damage to the engineresulting from a warrantable failure.PACCAR will pay for the lubricating oil,antifreeze, filter elements, belts, hoses,and other maintenance items that are notreusable due to the warrantable failure.PACCAR will pay for reasonable laborcosts for engine removal and reinstallationwhen necessary to repair a warrantablefailure.PACCAR will pay during the base enginewarranty period of two years or 100,000miles (160,000 kilometers), whicheveroccurs first: reasonable costs for towing avehicle disabled by a warrantable failure tothe nearest authorized repair location. Inlieu of the towing expense and in its solediscretion, PACCAR may pay reasonablecosts for a mechanic to travel to and from

the location of the vehicle when an enginerepair is performed at the site of the failure.

Owner ResponsibilitiesThe owner is responsible for the operationand maintenance of the engine asspecified in the applicable PACCAROperator’s Manual. The owner is alsoresponsible for providing proof that allrecommended maintenance has beenperformed.Before the expiration of the applicablewarranty, the owner must notify a PACCARauthorized engine dealer or an authorizedCummins Distributor of any warrantablefailure and make the engine available forrepair by such facility. The warrantablefailure must be brought to the attention of aPACCAR authorized engine dealer within30 days of discovery. Except for enginesdisabled by a warrantable failure, ownermust also deliver the engine to the repairfacility.The owner is responsible for the cost oflubricating oil, antifreeze, filter elementsand other maintenance items providedduring warranty repairs unless such itemsare not reusable due to the warrantablefailure. The owner is responsible forcommunication expenses, meals, lodging

and similar costs incurred as a result of awarrantable failure.The owner is responsible for non-enginerepairs and for “downtime” expenses,cargo damage, fines, all applicable taxes,all business costs and other lossesresulting from a warrantable failure.The owner is responsible for a $100 (U.S.Dollars) deductible per each service visitunder this plan in the 3rd, 4th, and 5thyears of base engine warranty. Thedeductible will not be charged during thefirst two years of the base engine warranty.

Warranty Limitations - Fire TruckYour sole and exclusive remedy againstPACCAR and the selling dealer arisingfrom your purchase and use of this engineis limited to the repair or replacement of“warrantable failures” at authorized UnitedStates and Canadian PACCAR enginedealers or an authorized CumminsDistributor, or an authorized PACCARengine facility where applicable, subject toPACCAR’s time, mileage, and hourlimitations of the engine warranty. Themaximum time, mileage and hourlimitations of the engine warranty beginrunning on the date of delivery to the firstpurchaser or first lessee. The accruedtime, mileage, or hours is calculated when


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the engine is brought into an authorizeddealer for correction of warrantablefailures.Failures, other than those resulting fromdefects in material or factory workmanship,are not covered by this warranty. PACCARis not responsible for failures or damageresulting from what PACCAR determines tobe abuse or neglect, including, but notlimited to: damage due to accident;operation without adequate coolants orlubricants; overfueling; overspeeding; lackof maintenance of lubricating, cooling orintake systems; improper storage, starting,warm-up, run-in or shutdown practices;failure to perform regeneration in a timelymanner; unauthorized modifications of theengine. PACCAR is also not responsiblefor failures caused by incorrect oil or fuel ordiesel exhaust fluid or by water, dirt orother contaminants in the fuel, oil, or dieselexhaust fluid. Failure of replacement partsused in repairs due to the above non-warrantable conditions is not warrantable.This warranty does not apply toaccessories supplied by the vehicle originalequipment manufacturer (OEM) which arecovered by the OEM vehicle warranty.Failures resulting in excessive oilconsumption are covered for the durationof the coverage or 100,000 miles (160,000

kilometers) from the date of delivery of theengine to the first purchaser or first lessee,whichever occurs first. Before a claim forexcessive oil consumption will beconsidered, the owner must submitadequate documentation to show thatconsumption exceeds PACCAR publishedstandards.Failures of belts and hoses supplied byPACCAR are covered for the first year fromthe date of delivery of the engine to the firstpurchaser or first lessee.Parts used to repair a warrantable failuremay be new parts, approved rebuilt parts,or repaired parts. PACCAR is notresponsible for failures resulting from theuse of parts not approved by PACCAR. Anew approved or rebuilt part used to repaira warrantable failure assumes the identityof the part it replaced and is entitled to theremaining coverage hereunder.PACCAR is not responsible for damage orloss resulting from engine horsepower/torque upgrades.PACCAR reserves the right to interrogateelectronic control module (ECM) data forpurposes of failure analysis.PACCAR does not warrant antifreeze,lubricants, filters, filter elements, or anyother part which is considered amaintenance item. PACCAR does not

warrant services to remove ash from theDPF either at or before a regular serviceinterval as indicated in the maintenanceschedule or when the system indicates thatthe DPF requires cleaning unless theservice is required as part of a warrantablerepair.PACCAR DOES NOT COVER WEAR ORWEAROUT OF COVERED PARTS.THIS WARRANTY AND THE EMISSIONWARRANTY SET FORTH HEREINAFTERARE THE SOLE WARRANTIES MADEBY PACCAR IN REGARD TO THESEENGINES.THIS LIMITED WARRANTY IS THE SOLEWARRANTY MADE BY PACCAR ANDTHE SELLING DEALER. EXCEPT FORTHE ABOVE LIMITED WARRANTY,PACCAR AND THE SELLING DEALERMAKE NO OTHER WARRANTIES,EXPRESS OR IMPLIED. PACCAR ANDTHE SELLING DEALER EXPRESSLYDISCLAIM ANY WARRANTY OFMERCHANTABILITY OR WARRANTY OFFITNESS FOR A PARTICULARPURPOSE.PACCAR AND THE SELLING DEALERSHALL NOT BE LIABLE FORINCIDENTAL OR CONSEQUENTIALDAMAGES INCLUDING, BUT NOTLIMITED TO: LOSS OF INCOME OR


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LOST PROFITS; ENGINE OR VEHICLEDOWNTIME; THIRD PARTY DAMAGE,INCLUDING DAMAGE OR LOSS TOOTHER ENGINES, VEHICLES ORPROPERTY, ATTACHMENTS, TRAILERSAND CARGO; LOSS OR DAMAGE TOPERSONAL CONTENTS;COMMUNICATION EXPENSES;LODGING AND/OR MEAL EXPENSES;FINES; APPLICABLE TAXES ORBUSINESS COSTS OR LOSSES;ATTORNEYS’ FEES; AND ANYLIABILITY YOU MAY HAVE IN RESPECTTO ANY OTHER PERSON OR ENTITY.This warranty gives you specific legalrights, and you may also have other rightswhich vary from state to state.

Emissions WarrantyThis emission warranty applies to newPACCAR engines marketed by PACCARthat are used in the United States3 invehicles designed for transporting personsor property on a street or highway.

CoveragePACCAR warrants to the first purchaser orfirst lessee and each subsequentpurchaser that the engine is designed, builtand equipped so as to conform at the timeof sale by PACCAR with all U.S. Federalemission regulations applicable at the timeof manufacture and that it is free fromdefects in material or factory workmanshipwhich would cause it not to meet theseregulations within the longer of thefollowing periods: (A) Five years or100,000 miles (160,000 kilometers) ofoperation, whichever occurs first, asmeasured from the date of delivery of theengine to the first purchaser or first lesseeor (B) The base engine warranty.If the vehicle in which the engine isinstalled is registered in the state ofCalifornia, a separate California EmissionsControl Warranty Statement on page 81also applies. See California EmissionsWarranty.

Replacement PartsPACCAR recommends that any serviceparts used for maintenance, repair or

replacement of emission control systemsbe new or genuine approved rebuilt partsand assemblies, and that the engine beserviced by an authorized PACCAR enginedealer. Your vehicle contains air, fuel, andelectrical components that may affectengine emission controls. The use of non-genuine engine or vehicle replacementparts that are not equivalent to thePACCAR engine or OEM vehiclemanufacturer’s original part may impair theengine and vehicle emissions controlsystem from working or functioningeffectively, and may jeopardize youremissions warranty coverage.

Warranty Limitations - EmissionsYour sole and exclusive remedy againstPACCAR and the selling dealer arisingfrom your purchase and use of this engineis limited to the repair or replacement of“warrantable failures” at authorized UnitedStates and Canadian PACCAR enginedealers or an authorized CumminsDistributor, or an authorized PACCARengine facility where applicable, subject toPACCAR’s time, mileage, and hourlimitations of the engine warranty. The



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maximum time, mileage and hourlimitations of the engine warranty beginrunning on the date of delivery to the firstpurchaser or first lessee. The accruedtime, mileage, or hours is calculated whenthe engine is brought into an authorizeddealer for correction of warrantablefailures.Failures, other than those resulting fromdefects in material or factory workmanship,are not covered by this warranty. PACCARis not responsible for failures or damageresulting from what PACCAR determines tobe abuse or neglect, including, but notlimited to: damage due to accident;operation without adequate coolants orlubricants; overfueling; overspeeding; lackof maintenance of lubricating, cooling orintake systems; improper storage, starting,warm-up, run-in or shutdown practices;failure to perform regeneration in a timelymanner; unauthorized modifications of theengine. PACCAR is also not responsiblefor failures caused by incorrect oil or fuel ordiesel exhaust fluid or by water, dirt orother contaminants in the fuel, oil, or dieselexhaust fluid. Failure of replacement partsused in repairs due to the above non-warrantable conditions is not warrantable.PACCAR is not responsible for non-enginerepairs, downtime expenses, cargo

damage, fines, all applicable taxes, allbusiness costs or other losses resultingfrom a warrantable failure.PACCAR does not warrant antifreeze,lubricants, filters, filter elements, or anyother part which is considered amaintenance item. PACCAR does notwarrant services to remove ash from theDPF either at or before a regular serviceinterval as indicated in the maintenanceschedule or when the system indicates thatthe DPF requires cleaning unless theservice is required as part of a warrantablerepair.THIS LIMITED EMISSION WARRANTY ISTHE SOLE WARRANTY MADE BYPACCAR RELATING TO THE EMISSIONEQUIPMENT. EXCEPT FOR THE ABOVELIMITED WARRANTY, PACCAR MAKESNO OTHER WARRANTIES, EXPRESSOR IMPLIED. PACCAR EXPRESSLYDISCLAIMS ANY WARRANTY OFMERCHANTABILITY OR WARRANTY OFFITNESS FOR A PARTICULARPURPOSE.PACCAR AND THE SELLING DEALERSHALL NOT BE LIABLE FORINCIDENTAL OR CONSEQUENTIALDAMAGES INCLUDING, BUT NOTLIMITED TO: LOSS OF INCOME ORLOST PROFITS; ENGINE OR VEHICLE

DOWNTIME; THIRD PARTY DAMAGE,INCLUDING DAMAGE OR LOSS TOOTHER ENGINES, VEHICLES ORPROPERTY, ATTACHMENTS, TRAILERSAND CARGO; LOSS OR DAMAGE TOPERSONAL CONTENTS;COMMUNICATION EXPENSES;LODGING AND/OR MEAL EXPENSES;FINES; APPLICABLE TAXES ORBUSINESS COSTS OR LOSSES;ATTORNEYS’ FEES; AND ANYLIABILITY YOU MAY HAVE IN RESPECTTO ANY OTHER PERSON OR ENTITY.

California Emissions ControlWarranty StatementYour Warranty Rights andObligationsThe California Air Resources Board andPACCAR are pleased to explain theemission control system warranty on your2018 - 2019 model year diesel engine. InCalifornia, new motor-vehicle engines mustbe designed, built, and equipped to meetthe State’s stringent anti-smog standards.PACCAR must warrant the emissioncontrol system on your diesel engine forthe periods of time listed below providedthere has been no abuse, neglect or


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improper maintenance of your dieselengine.Your emission control system may includeparts such as the fuel injection system andengine electronic control module. Alsoincluded may be hoses, connectors andother emission related assemblies.If an emission-related part on your engineis found to have a defect in material orfactory the part will be repaired or replacedby PACCAR. This is your emission controlsystem defects warranty.Emissions coverage for on-highwayapplications in the State of CaliforniaThis emission control system warrantyapplies to diesel engines (hereafter,engines) certified with the California AirResources Board beginning with the year2013, marketed by PACCAR, andregistered in California for use in on-highway applications.

Manufacturer's Warranty CoverageThis warranty coverage is provided for fiveyears or 100,000 mi (160,000) km or 3,000hours of engine operation, whichever firstoccurs from the date of delivery of theengine to the first purchaser or first lessee.Where a warrantable condition exists,PACCAR will repair your engine at no costto you including diagnosis, parts and labor.

Owner's Warranty ResponsibilitiesAs the engine owner, you are responsiblefor the performance of the requiredmaintenance listed in your PACCARoperator’s manual. You are responsible forpresenting your engine to an authorizedPACCAR engine dealer or an authorizedCummins Distributor as soon as a problemexists. The warranty repairs should becompleted in a reasonable amount of time,not to exceed 30 days.PACCAR recommends that you retain allreceipts covering maintenance on yourengine, but PACCAR cannot deny warrantysolely for the lack of receipts or for thefailure to ensure the performance of allscheduled maintenance.As the engine owner, you should also beaware that PACCAR may deny youwarranty coverage if your engine or a parthas failed due to abuse, neglect, impropermaintenance or unapproved modifications.If you have any questions regarding yourwarranty rights and responsibilities, youshould contact Kenworth Truck Company1-425-828-5000, Peterbilt Motor Companyat 1-940-591-4220, or the California AirResource Board at:

California Air Resource Board, 9528Telstar Avenue, El Monte, CA 91731

A warranted part which is scheduled forreplacement as required maintenance iswarranted up to the first scheduledreplacement point.Prior to the expiration of the applicablewarranty, the owner must give notice ofany warranted emission control failure toan authorized PACCAR engine dealer anddeliver the engine to such facility for repair.The owner is responsible for incidentalcosts such as: communication expenses,meals, lodging incurred by owner oremployees of owner as a result of awarrantable condition.The owner is responsible for downtimeexpenses, cargo damage, fines, allapplicable taxes, all business costs, andother losses resulting from a warrantablecondition.

Emissions Components StatementState of California emissions componentsstatement for the PACCAR PX-7 enginecoverage. This list of emission control partsmay be covered by the Emission ControlSystem Warranty under certain failuremodes.


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Aftertreatment System• Aftertreatment electroconnections• Aftertreatment inlet and outlet

modules• Aftertreatment temperature

interface module• Aftertreatment temperature

sensors• Decomposition chamber• DEF dosing valve• DEF level sensor• DEF line heater control relay• DEF quality sensor• DEF tank/lines heating elements of

heat exchanger and pipe• DEF tank and lines• DEF tank heater coolant control

valve• DEF temperature sensors• Diesel Exhaust Fluid (DEF) dosing

unit (Pump)• Diesel oxidation catalyst• Diesel particulate filter (except for

ash maintenance)• Diesel particulate filter differential

pressure sensor EGR

• Exhaust gas piping fromturbocharger out to the lastaftertreatment device

• NOx sensors• SCR catalyst

Air Handling Component• Ambient air temperature sensor• Charge air cooler and associated

plumbing• Exhaust gas pressure sensor• Exhaust manifold• Grid heater• Intake manifold• Intake manifold temperature/

pressure sensor• Throttle actuator/valve• Turbocharger actuator• Turbocharger assembly• Turbocharger compressor intake

pressure/temperature sensor• Turbocharger speed sensor

Base Engine System Component• Camshaft• Camshaft valve lobe• Clean idle sticker• Coolant temperature sensor

• Crankcase breather• Engine oil pressure sensor• Engine speed, position sensor,

cam position sensor• Exhaust valve

Electronic Control SystemComponent

• DEF lamp• Engine control module• Engine control module calibration• OBD connector• On Board Diagnostic (OBD)

Malfunction Indicator Lamp (MIL)• Wiring harness circuits connected

at both ends to emissionswarrantable components

Exhaust Gas Recirculation (EGR)System Component

• EGR cooler• EGR differential pressure sensor• EGR mixer/venturi• EGR temperature sensor• EGR valve

Fueling System• Fuel injectors• Fuel lines


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• Fuel pressure sensor• Fuel pump• Fuel pump actuator• Secondary fuel pressure/

temperature sensor

Replacement PartsPACCAR recommends that any serviceparts used for maintenance, repair orreplacement of emission control systemsbe new or genuine PACCAR approvedrebuilt parts and assemblies, and that theengine be serviced by an authorizedPACCAR engine dealer or an authorizedCummins Distributor. Your vehicle containsair, fuel, and electrical components thatmay affect engine emission controls. Theuse of non-genuine engine or vehiclereplacement parts that are not equivalentto the PACCAR engine or OEM vehiclemanufacturer’s original part may impair theengine and vehicle emissions controlsystem from working or functioningeffectively, and may jeopardize youremissions warranty coverage.The owner may elect to have maintenance,replacement or repair of the emissioncontrol parts performed by a facility otherthan an authorized PACCAR engine dealeror an authorized Cummins Distributor andmay elect to use parts other than new or

genuine approved rebuilt parts andassemblies for such maintenance,replacement or repair; however, the cost ofsuch service or parts and subsequentfailures resulting from such service or partswill not be covered under this emissioncontrol system warranty, except for“Emergency Repairs on page 84.”

PACCAR ResponsibilitiesThe warranty coverage begins when theengine is delivered to the first purchaser orfirst lessee. Repairs and service will beperformed by any authorized PACCARengine dealer or an authorized CumminsDistributor using new or genuine PACCARapproved rebuilt parts and assemblies.PACCAR will repair any of the emissioncontrol parts found by PACCAR to bedefective without charge for parts or labor(including diagnosis which results indetermination that there has been a failureof a warranted emission control part).

Emergency RepairsIn the case of an emergency where anauthorized PACCAR engine dealer or anauthorized Cummins Distributor is notavailable, repairs may be performed by anyavailable repair location or by anyindividual using any replacement parts. A

part not being available within 30 days or arepair not being complete within 30 daysconstitutes an emergency. PACCAR willreimburse the owner for expenses(including diagnosis), not to exceed themanufacturers suggested retail price for allwarranted parts replaced and laborcharges based on the manufacturersrecommended time allowance for thewarranty repair and the geographicallyappropriate hourly labor rate.Replaced parts and paid invoices must bepresented at an authorized PACCARengine dealer or an authorized CumminsDistributor as a condition of reimbursementfor emergency repairs not performed by anauthorized PACCAR engine dealer or anauthorized Cummins Distributor.

Warranty LimitationsYour sole and exclusive remedy againstPACCAR and the selling dealer arisingfrom your purchase and use of this engineis limited to the repair or replacement of“warrantable failures” at authorized UnitedStates and Canadian PACCAR enginedealers or an authorized CumminsDistributor, or an authorized PACCARengine facility where applicable, subject toPACCAR’s time, mileage, and hourlimitations of the engine warranty. The


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maximum time, mileage and hourlimitations of the engine warranty beginrunning on the date of delivery to the firstpurchaser or first lessee. The accruedtime, mileage, or hours is calculated whenthe engine is brought into an authorizeddealer for correction of warrantablefailures.Failures, other than those resulting fromdefects in material or factory workmanship,are not covered by this warranty. PACCARis not responsible for failures or damageresulting from what PACCAR determines tobe abuse or neglect, including, but notlimited to: damage due to accident;operation without adequate coolants orlubricants; overfueling; overspeeding; lackof maintenance of lubricating, cooling orintake systems; improper storage, starting,warm-up, run-in or shutdown practices;failure to perform regeneration in a timelymanner; unauthorized modifications of theengine. PACCAR is also not responsiblefor failures caused by incorrect oil or fuel ordiesel exhaust fluid or by water, dirt orother contaminants in the fuel, oil, or dieselexhaust fluid. Failure of replacement partsused in repairs due to the above non-warrantable conditions is not warrantable.PACCAR is not responsible for failuresresulting from improper repair or the use of

parts which are not genuine PACCARapproved parts.PACCAR is not responsible for the materialand labor costs of emission control partsand assemblies replaced during ScheduledMaintenance of the engine as specified inPACCAR Operator’s Manuals.PACCAR does not warrant antifreeze,lubricants, filters, filter elements, or anyother part which is considered amaintenance item. PACCAR does notwarrant services to remove ash from theDPF either at or before a regular serviceinterval as indicated in the maintenanceschedule or when the system indicates thatthe DPF requires cleaning unless theservice is required as part of a warrantablerepair.THIS WARRANTY, TOGETHER WITHTHE EXPRESS COMMERCIALWARRANTIES ARE THE SOLEWARRANTIES MADE BY PACCAR INREGARD TO THESE ENGINES.THIS LIMITED EMISSIONS WARRANTYIS THE SOLE WARRANTY MADE BYPACCAR AND THE SELLING DEALER.EXCEPT FOR THE ABOVE LIMITEDWARRANTY, PACCAR AND THESELLING DEALER MAKE NO OTHERWARRANTIES, EXPRESS OR IMPLIED.PACCAR AND THE SELLING DEALER

EXPRESSLY DISCLAIM ANYWARRANTY OF MERCHANTABILITY ORWARRANTY OF FITNESS FOR APARTICULAR PURPOSE.PACCAR AND THE SELLING DEALERSHALL NOT BE LIABLE FORINCIDENTAL OR CONSEQUENTIALDAMAGES INCLUDING, BUT NOTLIMITED TO: LOSS OF INCOME ORLOST PROFITS; ENGINE OR VEHICLEDOWNTIME; THIRD PARTY DAMAGE,INCLUDING DAMAGE OR LOSS TOOTHER ENGINES, VEHICLES ORPROPERTY, ATTACHMENTS, TRAILERSAND CARGO; LOSS OR DAMAGE TOPERSONAL CONTENTS;COMMUNICATION EXPENSES;LODGING AND/OR MEAL EXPENSES;FINES; APPLICABLE TAXES ORBUSINESS COSTS OR LOSSES;ATTORNEYS’ FEES; AND ANYLIABILITY YOU MAY HAVE IN RESPECTTO ANY OTHER PERSON OR ENTITY.


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Index

AAccessory Drive 65Additives to Cooling System 46After Replacing Engine Oil Filter(s) 58Aftertreatment Exhaust Piping 34Air Cleaner 67Air Compressor 67Air Intake Piping 34Antifreeze 64

BBatteries, Cables, and Connections 68Belt Routing 65Belts 65Biodiesel 50, 59

CCharge Air Cooler 68Charge Air Piping 68Chassis Fuel Filter / Water Separator 33Check Engine Lamp Turns On 11Checking Coolant Condition 64Cleaning the Engine 32Cold Weather Starting 22Compression Brake 17Compression Brake Controls 18Coolant Level 33Cooling Fan 33Cooling System 63

Cooling System Overheating 12Crankshaft - Vibration Damper 68

DDiesel Exhaust Fluid 34Diesel Exhaust Fluid (DEF) Lamp 15Diesel Exhaust Fluid filter 66Diesel Fuel 59Diesel Particulate Filter (DPF) Warning Lamp 15Drive Belts 65Driving 19

EELC 64Electrical Harness / Cables 68Electromagnetic Interference 25Engine Belt Checks 65Engine Braking System 16Engine Compression Brake Level Switch Operation 18Engine Coolant Specifications 48Engine Cooling Recommendations and Specifications 46Engine Fuel Filter / Water Separator 33Engine is overheating 12Engine Lubricating Oil Recommendations and Specifications 40Engine Lubrication and Filter Intervals 43Engine Maintenance 32Engine Mounting Bolts 68Engine Oil 55Engine Oil Capacities and Pressures 42Engine Oil Filter 55, 58Engine Oil Filter Specifications 39

Index

Engine Oil Level 54Engine Oil Pressure Lamp Turns On 11Engine Operating Range 23Engine Shutdown 25Engine Specifications for operator manual 38Engine Wait-To-Start Lamp 16Engine Warning Lamps 13Engine, Check Engine 14Engine, identification, PX, PX-7, PX-9, PX7, PX9, data, plate, ESN, serial, number, no,num 69Engine, identification, PX, PX-7, PX-9, PX7, PX9, horsepower, horse, power, hp,displacement, rating, model, nomenclature 72Exhaust Brake 16Extended Life Coolant 49, 64

FFan Belt Tensioner 65Filters 55–60Forward 6Fuel Filter 50, 59Fuel Filter Installation 60Fuel Filter Removal 60Fuel Filter Service Interval 52Fuel Gelling 52Fuel Recommendations 50Fuel System Priming 62

GGeneral Safety Instructions 7

HHigh Exhaust System Temperature (HEST) Warning Lamp 15

IIdling in Freezing Temperatures, Extended 24Illustrations 7Install Fuel Filter 60

MMaintenance Schedule Intervals 35Malfunction Indicator Lamp 14

NNormal Starting Procedure 21

OOil Change 58Oil Filter 58Oil Filter Removal 55–57Oil Filter Removal Preparation 55Oil Level Indication on Dipstick 55Operating on Grades and Dry Pavement 27Operating on Level and Dry Pavement 26Operating the Engine 22

PPoly V-belt and Fan Drive Belts 65Poly V-belt and Fan Drive Install 66Preventative Maintenance Schedule 36Priming the Fuel System 62PX Cooling System Maintenance 46

Index

RRadiator Hoses 65Recommendations and Specifications 52Recommendations to avoid fuel gelling in cold temperatures 52Remove Fuel Filter 60Remove Oil filter 55Remove Oil Filter 56, 57Replace Engine Oil 58Roadside Assistance 10Run Out of Fuel 62

SSafety 5Safety Alerts 5Starting After the Fuel Tank Has Run Dry 62Starting Procedure After Extended Shutdown or Oil Change 22Stop Engine Lamp 10, 14

TTopping Up the Engine Oil 55

UULSD 50Ultra Low Sulfur Diesel 50

VVisual Inspection of Engine 32

WWarranty and the Use of Biodiesel Fuel 51

Index

x 1518vue A 98009

PACRIEnginesP.O. Box 1518Bellevue, WA 98009 Y53-1183-1G1

Breathing diesel engine exhaust exposes you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.• Always start and operate the engine in a well-ventilated area. • If in an enclosed area, vent the exhaust to the outside. • Do not modify or tamper with the exhaust system. • Do not idle the engine except as necessary. For more information go to www.P65warnings.ca.gov/diesel.

WARNING

operator s manual 2019-2020 model years

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