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Rigid Axle Tandem and Tridem Axles Steering Axle PRLC 1925 PRC 4805 SPRC 1926 EPRC 4806 PSC 1875 PRLC 1927 PRLC 4805 EPRC 1927 SPRC 4806 PSC 1876 PRC 1935 PRC 4807 SPRC 1927 EPRC 4808 PSC 4564 PRLC 1935 PRC 5324 SPRC 4026 SPRC 4808 PSC 4565 PRC 3795 PRC 5814 PRC 3805 PRLC 7314 PRLC 4026 PRC 7534 Planetary Axle Wheel Ends Covered Planetary Spider Design Maintenance Manual No. 9E Issued 7-99 $2.50

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Rigid Axle Tandem and Tridem Axles Steering AxlePRLC 1925 PRC 4805 SPRC 1926 EPRC 4806 PSC 1875PRLC 1927 PRLC 4805 EPRC 1927 SPRC 4806 PSC 1876PRC 1935 PRC 4807 SPRC 1927 EPRC 4808 PSC 4564PRLC 1935 PRC 5324 SPRC 4026 SPRC 4808 PSC 4565PRC 3795 PRC 5814PRC 3805 PRLC 7314PRLC 4026 PRC 7534

Planetary Axle Wheel EndsCovered Planetary Spider Design

Maintenance Manual No. 9E

Issued 7-99$2.50

This publication provides maintenance and service procedures for AxleTech covered planetary spider designwheel end assemblies. The information contained in this publication was current at the time of printing andis subject to revision without notice or liability.

1. You must understand all procedures and instructions before you begin maintenance and serviceprocedures.

2. You must follow your company’s maintenance and service guidelines.

3. You must use special tools, when required, to avoid serious personal injury and damage to components.

AxleTech uses the following notations to alert the user of possible safety issues and to provide informationthat will help to prevent damage to equipment and components.

Service Notes

Additional Publications

• Cam-Master® Cam BrakesMaintenance Manual No. 4

• Wet Disc BrakesMaintenance Manual No. 4L

• Stopmaster® Off-Highway Heavy-Duty BrakesMaintenance Manual No. 4P

• SCL 2 Series Dry Disc Brake CalipersMaintenance Manual No. 4S

• SCL 35, 46, 53 Dry Disc Brake CalipersMaintenance Manual No. 4Y

WARNINGA WARNING indicates a procedure that youmust follow exactly to avoid serious personalinjury.

CAUTIONA CAUTION indicates a procedure that you must follow exactly to avoid damaging equip-ment or components. Serious personal injurycan also occur.

NOTE: A NOTE indicates an operation, procedureor instruction that is important for proper ser-vice. A NOTE can also supply information thatcan help to make service quicker and easier.

This symbol indicates that fasteners must betightened to a specific torque value.

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How To OrderOrder items from AxleTech International.

Phone orders are also accepted by calling AxleTechInternational’s Customer Service Center at877-547-3907 or send a fax to 866-547-3987.

Table of Contents

Asbestos and Non-Asbestos Fiber Warnings...................................................................................1

Section 1: Exploded ViewsPlanetary Axle Components .........................................................................................................................2Wheel End Components ...............................................................................................................................3

Section 2: IntroductionDescription .....................................................................................................................................................4Identification

Section 3: DisassemblyRemoving and Disassembling the Planetary Wheel Ends ........................................................................6Removing the Tires and RimsRemoving the Planetary Spider AssemblyIdentifying the Planetary Spider Assembly ................................................................................................7Disassembling the Planetary Spider Assembly ..........................................................................................8Planetary Pinion Shaft With Tapered Roller BearingsPlanetary Pinion Shaft With Needle Roller Bearings..................................................................................9Planetary Pinion Shaft With Nylon CoatingRemoving the Ring Gear and Axle Shaft ..................................................................................................10Preparing to Remove the Wheel HubAxles With Dry Disc BrakesAxles With Wet Disc BrakesAxles with P Series or RSA Drum BrakesRemoving the Ring Gear Hub and Wheel Hub ........................................................................................11Removing the Hub Oil Seal and Bearings ................................................................................................12Removing the Brake Drum or Disc Brake RotorRemoving the Brake ShoesRemoving the Spindle ................................................................................................................................13Axles with Dry Disc BrakesSteering Axles with RSA Drum BrakesSteering Axles with P Series Cam BrakesRigid Axles with P Series Cam Brakes ......................................................................................................14

Section 4: Prepare Parts for AssemblyCleaning Ground or Polished Parts............................................................................................................15Cleaning Parts with Rough FinishesCleaning Axle AssembliesDrying Cleaned PartsPreventing CorrosionInspecting PartsInspecting Tapered Roller Bearings ..........................................................................................................16Inspecting Planetary Wheel End Components..........................................................................................17Repairing or Replacing PartsRepair WeldingRemoving Capscrews Fastened with Liquid AdhesiveCleaning ......................................................................................................................................................17Using Dri-Loc Fasteners and AxleTech Liquid Adhesive ............................................................................18Reusing Dri-Loc Fasteners and Loctite® No. 277Applying Silicone Gasket Material ............................................................................................................19Flushing Lube From the AxleInstalling the Spindle on Rigid Axles With P Series Cam Brakes............................................................20Installing the Spindle on Rigid Axles With Dry Disc Brakes ....................................................................21Installing the Spindle on Steering Axles With P Series Cam BrakesInstalling the Spindle on Steering Axles With RSA Drum Brakes ..........................................................22

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Table of Contents

Section 5: AssemblyInstalling the Axle Shaft in Rigid Axle Models..........................................................................................23Assembling the Ring Gear Hub AssemblyAssembling the Hub, Bearings, Oil Seal and Drum or RotorInstalling the Wheel Hub ............................................................................................................................24Adjusting the Wheel Bearing PreloadInstalling the Planetary Ring Gear and Sun Gear ....................................................................................25Assembling the Planetary SpiderPlanetary Pinion Shaft With Tapered Roller Bearings..............................................................................26Planetary Pinion Shaft With Needle Roller BearingsNylon Coated Planetary Pinion Shaft ........................................................................................................28Installing the Planetary Spider Assembly ................................................................................................29Installing the Planetary Spider CoverAdjusting the BrakesInstalling the Tires and Rims......................................................................................................................30Filling the Wheel Ends With LubricantMeasuring and Adjusting the Toe SettingTandem and Tridem Axle Tire Matching ..................................................................................................31Tandem UnitsTridem UnitsHow to Match TiresTandem UnitsTridem Units

Section 6: LubricationLubrication Schedule ..................................................................................................................................32Lubrication Specifications

Section 7: SpecificationsPlanetary Axle Wheel End Torque Specifications ....................................................................................33

1

NON-ASBESTOS FIBERS WARNINGThe following procedures for servicing brakes are recommended to reduceexposure to non-asbestos fiber dust, a potential cancer and lung diseasehazard. Material Safety Data Sheets are available from AxleTech..

Hazard SummaryMost recently manufactured brake linings do not contain asbestos fibers. These brakelinings may contain one or more of a variety of ingredients, including glass fibers, mineralwool, aramid fibers, ceramic fibers and silica that can present health risks if inhaled.Scientists disagree on the extent of the risks from exposure to these substances.Nonetheless, exposure to silica dust can cause silicosis, a non-cancerous lung disease.Silicosis gradually reduces lung capacity and efficiency and can result in seriousbreathing difficulty. Some scientists believe other types of non-asbestos fibers, wheninhaled, can cause similar diseases of the lung. In addition, silica dust and ceramic fiberdust are known to the State of California to cause lung cancer. U.S. and internationalagencies have also determined that dust from mineral wool, ceramic fibers and silica arepotential causes of cancer.Accordingly, workers must use caution to avoid creating and breathing dust whenservicing brakes. Specific recommended work practices for reducing exposure to non-asbestos dust follow. Consult your employer for more details.

Recommended Work Practices1. Separate Work Areas. Whenever feasible, service brakes in a separate area awayfrom other operations to reduce risks to unprotected persons.2. Respiratory Protection. OSHA has set a maximum allowable level of exposure forsilica of 0.1 mg/m3 as an 8-hour time-weighted average. Some manufacturers of non-asbestos brake linings recommend that exposures to other ingredients found in non-asbestos brake linings be kept below 1.0 f/cc as an 8-hour time-weighted average.Scientists disagree, however, to what extent adherence to these maximum allowableexposure levels will eliminate the risk of disease that can result from inhaling non-asbestos dust.Therefore, wear respiratory protection at all times during brake servicing, beginning withthe removal of the wheels. Wear a respirator equipped with a high-efficiency (HEPA)filter approved by NIOSH or MSHA, if the exposures levels may exceed OSHA ormanufacturer’s recommended maximum levels. Even when exposures are expected tobe within the maximum allowable levels, wearing such a respirator at all times duringbrake servicing will help minimize exposure.3. Procedures for Servicing Brakes.a. Enclose the brake assembly within a negative pressure enclosure. The enclosure

should be equipped with a HEPA vacuum and worker arm sleeves. With theenclosure in place, use the HEPA vacuum to loosen and vacuum residue from thebrake parts.

b. As an alternative procedure, use a catch basin with water and a biodegradable, non-phosphate, water-based detergent to wash the brake drum or rotor and other brakeparts. The solution should be applied with low pressure to prevent dust from becomingairborne. Allow the solution to flow between the brake drum and the brake support orthe brake rotor and caliper. The wheel hub and brake assembly components should bethoroughly wetted to suppress dust before the brake shoes or brake pads areremoved. Wipe the brake parts clean with a cloth.

c. If an enclosed vacuum system or brake washing equipment is not available, carefullyclean the brake parts in the open air. Wet the parts with a solution applied with apump-spray bottle that creates a fine mist. Use a solution containing water, and, ifavailable, a biodegradable, non-phosphate, water-based detergent. The wheel huband brake assembly components should be thoroughly wetted to suppress dust beforethe brake shoes or brake pads are removed. Wipe the brake parts clean with a cloth.

d. Wear a respirator equipped with a HEPA filter approved by NIOSH or MSHA whengrinding or machining brake linings. In addition, do such work in an area with a localexhaust ventilation system equipped with a HEPA filter.

e. NEVER use compressed air by itself, dry brushing, or a vacuum not equipped with aHEPA filter when cleaning brake parts or assemblies. NEVER use carcinogenicsolvents, flammable solvents, or solvents that can damage brake components aswetting agents.

4. Cleaning Work Areas. Clean work areas with a vacuum equipped with a HEPA filteror by wet wiping. NEVER use compressed air or dry sweeping to clean work areas.When you empty vacuum cleaners and handle used rags, wear a respirator equippedwith a HEPA filter approved by NIOSH or MSHA, to minimize exposure. When youreplace a HEPA filter, wet the filter with a fine mist of water and dispose of the used filterwith care.5. Worker Clean-Up. After servicing brakes, wash your hands before you eat, drink orsmoke. Shower after work. Do not wear work clothes home. Use a vacuum equippedwith a HEPA filter to vacuum work clothes after they are worn. Launder them separately.Do not shake or use compressed air to remove dust from work clothes.6. Waste Disposal. Dispose of discarded linings, used rags, cloths and HEPA filters withcare, such as in sealed plastic bags. Consult applicable EPA, state and local regulationson waste disposal.

Regulatory GuidanceReferences to OSHA, NIOSH, MSHA, and EPA, which are regulatory agencies in theUnited States, are made to provide further guidance to employers and workers employedwithin the United States. Employers and workers employed outside of the United Statesshould consult the regulations that apply to them for further guidance.

!ASBESTOS FIBER WARNINGThe following procedures for servicing brakes are recommended to reduceexposure to asbestos fiber dust, a cancer and lung disease hazard. MaterialSafety Data Sheets are available from AxleTech..

Hazard SummaryBecause some brake linings contain asbestos, workers who service brakes mustunderstand the potential hazards of asbestos and precautions for reducing risks. Exposureto airborne asbestos dust can cause serious and possibly fatal diseases, includingasbestosis (a chronic lung disease) and cancer, principally lung cancer and mesothelioma(a cancer of the lining of the chest or abdominal cavities). Some studies show that the riskof lung cancer among persons who smoke and who are exposed to asbestos is muchgreater than the risk for non-smokers. Symptoms of these diseases may not becomeapparent for 15, 20 or more years after the first exposure to asbestos.Accordingly, workers must use caution to avoid creating and breathing dust whenservicing brakes. Specific recommended work practices for reducing exposure toasbestos dust follow. Consult your employer for more details.

Recommended Work Practices1. Separate Work Areas. Whenever feasible, service brakes in a separate area awayfrom other operations to reduce risks to unprotected persons. OSHA has set a maximumallowable level of exposure for asbestos of 0.1 f/cc as an 8-hour time-weighted averageand 1.0 f/cc averaged over a 30-minute period. Scientists disagree, however, to whatextent adherence to the maximum allowable exposure levels will eliminate the risk ofdisease that can result from inhaling asbestos dust. OSHA requires that the following signbe posted at the entrance to areas where exposures exceed either of the maximumallowable levels:

DANGER: ASBESTOSCANCER AND LUNG DISEASE HAZARD

AUTHORIZED PERSONNEL ONLYRESPIRATORS AND PROTECTIVE CLOTHING

ARE REQUIRED IN THIS AREA

2. Respiratory Protection. Wear a respirator equipped with a high-efficiency (HEPA) filterapproved by NIOSH or MSHA for use with asbestos at all times when servicing brakes,beginning with the removal of the wheels.3. Procedures for Servicing Brakes.a. Enclose the brake assembly within a negative pressure enclosure. The enclosure

should be equipped with a HEPA vacuum and worker arm sleeves. With the enclosurein place, use the HEPA vacuum to loosen and vacuum residue from the brake parts.

b. As an alternative procedure, use a catch basin with water and a biodegradable, non-phosphate, water-based detergent to wash the brake drum or rotor and other brakeparts. The solution should be applied with low pressure to prevent dust from becomingairborne. Allow the solution to flow between the brake drum and the brake support orthe brake rotor and caliper. The wheel hub and brake assembly components should bethoroughly wetted to suppress dust before the brake shoes or brake pads are removed.Wipe the brake parts clean with a cloth.

c. If an enclosed vacuum system or brake washing equipment is not available, employersmay adopt their own written procedures for servicing brakes, provided that theexposure levels associated with the employer’s procedures do not exceed the levelsassociated with the enclosed vacuum system or brake washing equipment. ConsultOSHA regulations for more details.

d. Wear a respirator equipped with a HEPA filter approved by NIOSH or MSHA for usewith asbestos when grinding or machining brake linings. In addition, do such work in anarea with a local exhaust ventilation system equipped with a HEPA filter.

e. NEVER use compressed air by itself, dry brushing, or a vacuum not equipped with aHEPA filter when cleaning brake parts or assemblies. NEVER use carcinogenicsolvents, flammable solvents, or solvents that can damage brake components aswetting agents.

4. Cleaning Work Areas. Clean work areas with a vacuum equipped with a HEPA filter orby wet wiping. NEVER use compressed air or dry sweeping to clean work areas. When youempty vacuum cleaners and handle used rags, wear a respirator equipped with a HEPAfilter approved by NIOSH or MSHA for use with asbestos. When you replace a HEPA filter,wet the filter with a fine mist of water and dispose of the used filter with care.5. Worker Clean-Up. After servicing brakes, wash your hands before you eat, drink orsmoke. Shower after work. Do not wear work clothes home. Use a vacuum equipped witha HEPA filter to vacuum work clothes after they are worn. Launder them separately. Do notshake or use compressed air to remove dust from work clothes.6. Waste Disposal. Dispose of discarded linings, used rags, cloths and HEPA filters withcare, such as in sealed plastic bags. Consult applicable EPA, state and local regulations onwaste disposal.

Regulatory GuidanceReferences to OSHA, NIOSH, MSHA, and EPA, which are regulatory agencies in the UnitedStates, are made to provide further guidance to employers and workers employed withinthe United States. Employers and workers employed outside of the United States shouldconsult the regulations that apply to them for further guidance.

!

Asbestos and Non-Asbestos Fibers

2

Section 1Exploded View

Item Description1 Plug – oil level / fill2 Cover – planetary spider3 Thrust button – axle shaft4 Capscrew – planetary

spider mount5 Planetary spider6 Snap Ring – axle shaft7 Sun Gear – planetary8 Washer – sun gear thrust9 Nut – wheel bearing

adjusting10 Lock – wheel bearing

adjusting nut11 Capscrew – hub nut lock12 Lock – wheel bearing

adjusting nut

Item Description13 Gear – planetary ring14 Hub – planetary ring gear15 Lock – planetary ring gear16 Capscrew – planetary ring

gear lock17 Capscrew – planetary

spider cover18 Nut – wheel stud19 Washer – wheel stud nut20 Clamp – wheel rim21 Wheel Stud22 Washer – wheel stud23 Plug – oil drain24 Shaft – planet pinion25 Washer – planet pinion

outer thrust

Item Description26 Pinion – planetary drive27 Washer – planet pinion

inner thrust28 Needle Roller Bearings29 Spacer – needle roller

bearing30 Locknut – planetary pinion

shaft31 Spacer – planetary pinion

bearing32 Snap Ring – tapered

bearing assembly33 Tapered Roller Bearing

Assembly34 Ball – pinion shaft lock

10

11

1

2

3

4

5

Planetary Axle Components

6

78

9

1112

13

17 1819 20

2122

23

2425

26

27

24

25

2829

2826

3031

26

3233

2434

27

14

15 16

PLANETARY PINASSEMBLY WITHTAPEREDROLLERBEARINGS

PLANETARY PINASSEMBLY WITHNEEDLE ROLLERBEARINGS

NYLON COATEDPLANETARY PIN ASSEMBLY

ALTERNATENUT LOCK

3

Section 1Exploded View

Item Description1 Cone – outer wheel bearing2 Cup – outer wheel bearing3 Wheel Hub4 Cup – inner wheel bearing5 Cone – inner wheel bearing6 Oil Seal – hub inner bearing7 Washer – brake disc to hub8 Capscrew – brake disc to hub9 Disc – Brake

10 Spindle (Dry Disc Version shown)11 Locknut – brake caliper mount12 Washer – brake caliper mount13 Brake Driver – wet disc brake

Item Description14 Washer – brake driver mount15 Capscrew – brake driver mount16 Capscrew – spindle mount17 Washer – spindle mount18 Spindle (typical wet or drum brake)19 Brake Drum20 Washer – drum mount21 Capscrew – drum mount22 Return Spring – brake shoe23 Brake Shoe & Lining Assembly24 Camshaft – air actuated brake25 Axle Shaft (for rigid axle)26 Axle Shaft Universal Joint Assembly

Wheel End Components

43

56

78

910

1112

1312

1415

1617

18

19

2021

24

2526

23

22

4

Section 2Introduction

DescriptionAxleTech covered spider design planetary axlesincorporate a single or double reduction carrierwith hypoid gearing mounted in the axle center.Final gearing reduction occurs in the wheel hubsby planetary design spur gears.

AxleTech planetary axles permit the carrier hypoidgearing and axle shafts to carry only nominaltorsional loads. At the same time, the planetaryaxles also provide the highest practical numericalgear reduction at the wheels.

• Power is transmitted by the hypoid gear set inthe carrier to the axle shafts and the sun gearof the final reduction, through the revolvingplanetary gears and into the planetary spiderwhich drives the wheel hub.

• The floating sun gear teeth mesh with teeth ofthe planetary spur gears.

• The planetary gears rotate on planetary shaftsmounted on the spider. The planetary gearteeth, in turn, mesh with the fixed or floatingring gear teeth.

Figure 2.1

IDENTIFICATIONTAG

Axle Identification Tag Location

Model No. . . . . . . . . . . . . . . . . .Customer No. . . . . . . . . . . . . . .

Serial No. . . . . . . . Plant . . . . . . ..Ratio . . . . . . . . . . Date . . . . . . . .

PRC-7534-W4H-200

IdentificationTo determine the exact axle model specification,refer to the identification tag located on the axle.Figures 2.1, 2.2 and Figure 2.3.

5

Section 2Introduction

SINGLE PLANETARY AXLEFigure 2.3

P S C 1 8 7 6 P 1 0 0

ExactSpecification

R = RigidS = Steering

P = PlanetaryN = Non-Drive

Last Digit – CarrierDesignation forBase Model Number

First Two Digits WheelEnd Designation (Basic Model Number)

Housing Type DesignationC = Integral Cast

Only If Applicable:T = Transmission on CarrierO= Oscillating or Pin MountL = Mounting Other Than Pad

with Drilling

Brake Type:N — NoneNR — With Rotor Less CalipersP — Cam-Master® “P” Series CamDLH — 17 in. (432 mm) Hydraulic Drum

– (Dual Leading Hydraulic)HDB — Hydraulic Dry DiscRDA — Stopmaster® Wedge (Dual Air

Chamber)RDH — Stopmaster® Wedge (Dual

Hydraulic Cylinders)RSA — Stopmaster® Wedge Single Air

ChamberRSH — Stopmaster® Wedge (Single

Hydraulic Cylinders)W4H — Dura-Disc® 17 in. (432 mm) Wet

DiscW4M — Dura-Disc® 17 in. (432 mm) Wet

Disc Spring Applied HydraulicRelease

WDH432 — Dura-Disc® 17 in. (432 mm)Wet Disc (Unit Mount)

STEERINGEXAMPLE

P R C 7 5 3 4 W 4 H 2 0 0RIGIDEXAMPLE

TANDEM AND TRIDEM AXLESFigure 2.2

S P R C – 4 8 0 8

R = RigidS = Steering

Housing TypeDesignationC = Integral

Cast

Last Digit –CarrierDesignation forBase ModelNumber

First Two orThree DigitsWheel EndDesignation(Basic ModelNumber)

Only if applicableS = TandemE = Tridem

P = PlanetaryN = No

PlanetaryGears

6

Section 3Disassembly

Removing and Disassemblingthe Planetary Wheel Ends

WARNINGTo prevent serious eye injury, always wear safeeye protection when you perform vehiclemaintenance or service.

WARNINGBlock the wheels to prevent the vehicle frommoving. Support the vehicle with safety stands.Do not work under a vehicle that is supportedonly by jacks. Jacks can slip or fall over and causeserious personal injury.

1. Park the vehicle on a level surface.

2. Block the wheels that will not be raised to keepthe vehicle from moving.

3. Raise the vehicle, so that the area you willservice is off of the ground. Support the vehiclewith safety stands. Refer to the vehiclemaintenance manual for instructions on raisingthe vehicle.

Removing the Tires and RimsNOTE: You can service the planetary gearing onflange mounted hubs without removing the tirefrom the planetary wheel end.

1. Remove the nuts, washers and wheel rimclamps. Remove the tire, rim and spacer.

2. Rotate the hub assembly until the oil drain plugin the planetary spider is at the bottom.

3. Remove the oil drain plug. Drain and discardthe lubricant.

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!

Removing the PlanetarySpider Assembly1. Match mark the spider and wheel hub for

correct alignment when you reassemble theunit. Figure 3.1.

2. Remove the planetary spider cover capscrews.Remove the planetary spider cover.

3. Remove the spider-to-hub capscrews andwashers or nuts and washers.

• To remove studs with integral hex andwashers: Use a 3.25-inch internal depth,extra deep socket.

4. Insert a pry bar into the assembly notches andseparate the planetary spider assembly fromthe wheel hub assembly. Figure 3.2. Do notremove the spider assembly at this time.

• For axles without assembly notches: Strikethe spider with a plastic or rubber mallet toseparate the planetary assembly from thewheel hub assembly. Do not remove thespider assembly at this time.

Figure 3.1

(RIM MOUNTED)

MATCH MARKSPIDER AND HUB

Identifying the PlanetarySpider AssemblyAxleTech planetary wheel ends come equippedwith different planetary designs:

• Planetary pinion shafts with tapered rollerbearings

• Planetary pinion shafts with needle rollerbearings

• Planetary pinion shafts with nylon coating

To identify the design you are servicing, inspectthe outside planetary spider flange.

Planetary spider assemblies with a locknut onthe outside flange: This type of planetary designincludes planetary pinion shafts with taperedroller bearings. Figure 3.4.

Planetary spider assemblies without a locknut onthe outside flange: This type of planetary designcan include planetary pinion shafts with needleroller bearings or planetary pinion shafts withnylon coating. Figure 3.5.

7

Section 3Disassembly

WARNINGTake care when you use lifting devices. Whenyou use a lifting strap, inspect the strap fordamage before you use it. Do not use a liftingstrap to shock load or drop load a component.Serious personal injury and damage tocomponents can result.

5. Use a lifting device to remove the planetaryspider assembly from the wheel hubassembly. Figure 3.3.

!

Figure 3.2

Figure 3.4

Figure 3.3

Planetary spider assembly withlocknuts on the outside flange

8

Section 3Disassembly

Disassembling the PlanetarySpider AssemblyNOTE: During disassembly, mark or tag theplanetary spider parts you do not plan to replace.Marking and tagging these parts, will aid correctinstallation during assembly.

Follow the correct disassembly procedure for thetype of planetary design you are servicing.

Planetary Pinion Shaft WithTapered Roller Bearings

CAUTIONCarefully remove the planetary pinion shafts. Aball in the large end of each planetary pinionshaft, prevents the pinion shaft from rotatingand can become lost as it disengages from thespider.

NOTE: DO NOT mix bearing components fromone bearing set with those of other bearing sets.A matched bearing set consists of two cups, twocones, a cone spacer and a cup spacer.

1. Remove the planetary pinion shaft lock nuts.

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Figure 3.5 Planetary spider assembly withoutlocknuts on the outside flange WARNING

Observe all WARNINGS and CAUTIONS providedby the press manufacturer concerning pressoperation to avoid serious personal injury andpossible damage to components duringassembly and installation procedures.

2. Place the spider assembly in a press, flangeside UP.

• If a press is not available: Use a brass driftand a mallet to remove the pinion shafts.

3. Support the spider assembly as required.

4. Place a container of cushioning material underthe press to catch the planetary pinion shaftsas they are pressed out of the spider andplanetary pinion gears. Figure 3.6.

5. Press a planetary pinion shaft out of thespider. Figure 3.6.

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Figure 3.6

PRESS

9

Section 3Disassembly

NOTE: Mark the bearings to aid correctinstallation during assembly.

6. Remove the bearing cones and bearing conespacer from the planetary pinion gear. Figure 3.7.

NOTE: The bearing cups are positioned in theplanetary pinion gears with a snap ring betweenthem. DO NOT press both cups out from one endof the planetary pinion gear at the same time. Ifthe bearing cups do not need to be replaced, donot remove them from the planetary pinion gears.

7. Inspect the bearing cups and bearing cones forwear and damage.

• If the bearing cups and bearing cones arefree of wear and damage: Clean andlubricate the components.

• If the bearing cups and bearing cones areworn or damaged: Remove and replace thetwo bearing cups and spacer. Avoiddamaging the internal diameter of the gearwhen you remove the bearing cups.

8. Remove the snap ring and spacer.

9. Press-out the remaining bearing cup.

Planetary Pinion Shaft With NeedleRoller Bearings

Planetary Pinion Shaft With NylonCoating

WARNINGObserve all WARNINGS and CAUTIONS providedby the press manufacturer concerning pressoperation to avoid serious personal injury andpossible damage to components duringassembly and installation procedures.

1. Place the spider assembly in a press with theflange side DOWN.

• If a press is not available: Use a brass driftand mallet to remove the pinion shafts.

2. Support the spider assembly as required.

3. Place a container of cushioning material underthe press to catch the planetary pinion shaftsas you press them out of the spider andplanetary pinion gears.

4. Press each pinion shaft out of the spider andplanetary gear. Figure 3.8 and Figure 3.9.

• For bolted cover designs: You may be ableto remove the planetary pinion shaft byhand. Use a press to remove the planetaryshaft only when necessary.

!Figure 3.7

PINIONSHAFT

SPACER

PLANETARYGEAR

BEARINGASSEMBLYWITH SNAPRING

Figure 3.8 Planetary pinion shaft withneedle roller bearingsINNER

THRUSTWASHER

NEEDLEROLLERS

SPACER

PLANETARYGEAR

NEEDLEROLLERS

OUTERTHRUSTWASHER

PINIONSHAFT

4. Remove the sun gear thrust washer assembly.Figure 3.11.

5. On rigid axle models without integral sungear: Remove the axle shaft.

6. To remove the axle shaft from a steering axle:Remove the wheel hub and spindle before youremove the axle shaft.

Preparing to Remove the Wheel HubAxles With Dry Disc Brakes

Remove the brake caliper and adapter assembly.Refer to Maintenance Manuals No. 4S, SCL 2Series Dry Disc Brake Calipers and MaintenanceManual No. 4Y, SCL 35, 46, 53 Dry Disc BrakeCalipers. To order these publications, callAxleTech’s Customer Service Center at 877-547-3907.

Axles With Wet Disc Brakes

Refer to Maintenance Manual No. 4L, Wet DiscBrakes, for instructions on removing andservicing the wheel hub, brake driver, hub oilseal, wheel bearings and spindle. To order thismanual, call AxleTech’s Customer Service Center at877-547-3907.

5. Remove the planetary gears and thrustwashers from the planetary spider.

6. For planetary pinion shafts with needle rollerbearings: Remove the needle roller bearingsand spacer from the bore of the planetary gear.

Removing the Ring Gear and Axle Shaft1. For models where the ring gear is not secured

to the ring gear hub, remove the floating ringgear. If necessary, use a lifting device toremove the ring gear. Figure 3.10.

2. Remove the snap ring from the end of the axleshaft.

3. Remove the sun gear. Figure 3.10.

• On rigid axles with integral axle shaft andsun gear: Remove the complete axle shaft.

10

Section 3Disassembly

Figure 3.11

AXLESHAFT

THRUSTWASHER

Figure 3.10

SUNGEAR

SNAPRING

RINGGEAR

AXLESHAFT

Figure 3.9

SPIDER

INNER THRUSTWASHER(SMALL BORE)

PLANETARYGEAR

OUTER THRUSTWASHER

Planetary pinion shaft withnylon coating

PINIONSHAFT

11

Section 3Disassembly

Axles With P Series or RSA Drum Brakes

WARNINGWhen you work on a spring chamber, carefullyfollow the service instructions of the chambermanufacturer. Sudden release of a compressedspring can cause serious personal injury.

1. If the brake has spring chambers, manuallycompress and lock the springs to release thebrakes.

NOTE: If AxleTech automatic slack adjusters areused, refer to AxleTech Maintenance Manual No.4B, PayMaster® Automatic Slack Adjuster for thecorrect adjustment procedure. To order thispublication, call AxleTech’s Customer ServiceCenter at 877-547-3907.

2. Turn the slack adjuster manual adjusting nutuntil the brake shoes fully retract and the drumclears the lining.

Removing the Ring Gear Huband Wheel Hub1. Remove the capscrews from the adjusting

nut lock. The adjusting nut lock features one ofthe following designs:

• A ring that secures all corners of the nut

• One or two bow ties that secure one or twocorners of the adjusting nut or the flat ofthe nut

2. Remove the wheel bearing adjusting nut lockand wheel bearing nut.

CAUTIONSupport the wheel hub, as shown in Figure 3.12,before you remove the ring gear and the ringgear hub assembly. Do not remove the ring gearand the ring gear hub assembly withoutsupporting the wheel hub. Serious personalinjury and damage to components can result.

3. Remove the ring gear hub by pulling it straightout of the wheel hub and off of the spindle. Toavoid dropping and possibly damaging theouter wheel bearing cone, ensure that theouter wheel bearing cone remains in place asyou remove the ring gear hub. Figure 3.12.

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• If you cannot remove the ring gear hub byhand: Install capscrews into the pullerscrew holes in the ring gear hub flange(0.625-11 UNC thread). Tighten eachcapscrew the same amount to separate thering gear hub assembly from the spindleand the wheel hub.

NOTE: On models without a floating ring gear,the ring gear is secured to the ring gear hub withcapscrews and retainer plates on the back side ofthe assembly.

4. Remove the retainer plate capscrews toremove the ring gear from the ring gear hub.Figure 3.13.

5. Remove the outer wheel bearing from the ringgear hub.

Figure 3.12

Figure 3.13

RETAINER PLATE(SOME MODELS)

RING GEAR

HUB OUTERWHEELBEARING

12

Section 3Disassembly

NOTE: The ring gear hub assembly includes thehub and ring sleeve insert. You can not servicethese components separately.

6. Use a chain fall or similar device to lift the huband drum slightly to relieve the hub weightand drum-to-brake shoe drag. Remove theassembly from the hub spindle. Figure 3.14.

Removing the Hub Oil Seal and Bearings1. Position the wheel hub with the brake end

UPWARD.

NOTE: Some axle model designs with dry discbrakes provide enough clearance to remove thehub oil seal, bearing cone and bearing cupswithout removing the rotor.

• If you can remove the hub oil seal, bearingcone and bearing cups from the axle withoutremoving the rotor: Proceed to Step 3.

• If you must remove the rotor from the wheelhub to remove the hub oil seal, bearing coneand bearing cups: Proceed to Step 2.

2. Remove the rotor mounting capscrews andwashers. Remove the rotor.

3. Remove the hub oil seal with a suitable puller.Do not scratch the hub seal bore surface.

4. Remove the inner bearing cone.

5. Remove the bearing cups with a suitablepuller.

Removing the Brake Drum orDisc Brake Rotor1. Match mark the drum and hub.

2. Remove the capscrews and washers from thebrake drum or rotor joint.

WARNINGTake care when you use lifting devices. Whenyou use a lifting strap, inspect the strap fordamage before you use it. Do not use a liftingstrap to shock load or drop load a component.Serious personal injury and damage tocomponents can result.

3. Remove the brake drum or rotor from thewheel hub. If necessary, use a lifting device toremove the brake drum or rotor.

Removing the Brake ShoesTo remove the brake shoes, refer to the correctmaintenance manual.

• For P series brakes: Refer to MaintenanceManual No. 4, Cam-Master® Cam Brakes.

• For RSA drum brakes: Refer to MaintenanceManual No. 4P, Stopmaster® Off-HighwayHeavy-Duty Brakes.

• For SCL 2 series dry disc brakes: Refer toMaintenance Manual No. 4S, SCL 2 Series DryDisc Brake Calipers.

• For SCL 35, 46 or 53 series dry disc brakes:Refer to Maintenance Manual No. 4Y, SCL 35,46, 53 Dry Disc Brake Calipers.

To order these publications, call AxleTech’sCustomer Service Center at 877-547-3907.

!Figure 3.14

13

Section 3Disassembly

Removing the SpindleAxles With Dry Disc Brakes

1. Match mark the spindle and housing flange.

2. Use straps and a lifting device to support thespindle.

3. Remove the spindle mounting capscrews andwashers.

4. Remove the spindle from the axle housing orsteer knuckle.

Steering Axles With RSA DrumBrakes

1. Remove all air from the air system.

2. Remove the air lines from the air chamber.Tag the lines and ports to aid reassembly.

WARNINGWhen you work on a spring chamber, carefullyfollow the service instructions of the chambermanufacturer. Sudden release of a compressedspring can cause serious personal injury.

3. If the brake has spring chambers, manuallycompress and lock the springs to release thebrakes.

4. Match mark the air chamber housing tube andthe brake spider plunger housing to aidreassembly.

5. Remove the set-screw that retains the airchamber assembly in the spider plungerhousing.

6. If there is a collet nut on the threads of thechamber housing tube: Use a hammer and abrass drift to loosen the collet nut.

7. Remove the air chamber assembly from theplunger housing. If necessary, use a strapwrench to remove the air chamber assembly.

8. Remove the brake shoe return springs.

9. Rotate the brake shoes to allow access to thespindle/brake spider mounting capscrews.

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10. Match mark the brake spider and steeringknuckle to aid correct installation atassembly.

11. Remove the two capscrews and washers thatmount the brake spider and spindle to thesteering knuckle at the 11 and 1 o’clockpositions.

12. Install two studs 4-6 inches long with 0.875-14UNF threads on the end that engages thesteering knuckle to aid spindle removal.

13. Support the spindle and brake spiderassembly.

14. Remove the remaining capscrews andwashers.

15. Remove the brake spider and brake shoeassembly.

NOTE: The oil seal in the bore of the spindle largeend may be damaged during spindle removal.

16. Remove the spindle from the steeringknuckle by sliding the spindle over the outerend of the axle shaft and universal jointassembly.

17. Remove the axle shaft and universal jointassembly.

Steering Axles With P Series Cam Brakes

1. Remove the brake shoe return springs.

2. Rotate the brake shoes until enoughclearance exists to remove the spindlemounting nuts and washers with a wrench.

3. Remove the spindle mounting nuts andwashers.

NOTE: The oil seal in the bore of the spindle largeend may be damaged during spindle removal.

4. Remove the spindle from the steer knuckle bysliding the spindle over the outer end of theaxle shaft assembly.

5. Remove the axle shaft and universal jointassembly.

14

Section 3Disassembly

Rigid Axles With P Series Cam Brakes

NOTE: Some rigid axles feature a two-piececamshaft and coupling which allows you toremove the camshaft without removing the slackadjuster. When servicing an axle with a two-piececamshaft and coupling, proceed to Step 6.

1. Remove the brake shoe return springs.

2. Rotate the brake shoes to allow access to thebrake camshaft and the spindle mountingcapscrews.

3. Remove the slack adjuster clevis pin thatconnects the air chamber push rod.

4. Remove the snap ring and washers thatconnect the slack adjuster to the brakecamshaft. Stack the washers and separatethem from other parts.

5. Remove the slack adjuster and washers.Separate the washers from other parts andprevent them from mixing with the washersyou previously removed.

6. Remove the snap rings that retain thecamshaft in the spindle support boss.

7. Remove the brake camshaft from the spindle.Separate the washers you removed from theface of the spindle boss. Prevent the washersfrom mixing with the washers you previouslyremoved.

WARNINGTake care when you use lifting devices. Whenyou use a lifting strap, inspect the strap fordamage before you use it. Do not use a liftingstrap to shock load or drop load a component.Serious personal injury and damage tocomponents can result.

8. Use straps and a lifting device to support thespindle and brake shoe assembly.

9. Match mark the housing and spindle flange.

10. Remove the mounting capscrews andwashers.

11. Remove the spindle from the axle housing.

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15

Section 4Prepare Parts for Assembly

Cleaning Ground or Polished Parts

WARNINGTo prevent serious eye injury, always wear safeeye protection when you perform vehiclemaintenance or service.

Solvent cleaners can be flammable, poisonousand cause burns. Examples of solvent cleanersare carbon tetrachloride, emulsion-type cleanersand petroleum-based cleaners. To avoid seriouspersonal injury when you use solvent cleaners,you must carefully follow the manufacturer’sproduct instructions and these procedures:

• Wear safe eye protection.

• Wear clothing that protects your skin.

• Work in a well-ventilated area.

• Do not use gasoline or solvents that containgasoline. Gasoline can explode.

• You must use hot solution tanks or alkalinesolutions correctly. Follow the manufacturer’sinstructions carefully.

• Use a cleaning solvent to clean ground orpolished parts or surfaces. Kerosene or dieselfuel oil can be used for this purpose. NEVERUSE GASOLINE.

• Remove gasket material from parts. Be carefulnot to damage ground surfaces.

• DO NOT clean ground or polished parts in ahot solution tank, water, steam or alkalinesolution.

Cleaning Parts With Rough Finishes• Parts with a rough finish can be cleaned with

cleaning solvent or in a hot solution tank witha weak alkaline solution.

• Parts must remain in hot solution tanks untilcompletely cleaned and heated.

• Parts must be washed with water until thealkaline solution is removed.

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Cleaning Axle Assemblies• A complete axle assembly can be steam

cleaned on the outside to remove dirt.

• Before the axle is steam cleaned, close or put acover over all openings in the axle assembly.Examples of openings are breathers or vents in air chambers.

Drying Cleaned Parts• Dry the parts immediately after cleaning and

washing.

• Dry the parts with soft clean paper or rags.

CAUTIONDamage to bearings can be caused if dried byrotating with compressed air.

• Except for bearings, parts can be dried withcompressed air.

Preventing Corrosion• Apply a light lubricant to cleaned and dried

parts that are not damaged and are to beassembled.

• Apply a special material that preventscorrosion to all surfaces. If parts are to bestored, wrap the parts in special paper thatprevents corrosion.

Inspecting PartsIt is very important to inspect all parts carefullyand completely before the axle or carrier isassembled. Check all parts for wear and replacedamaged parts. Replacement of damaged orworn parts will prevent breakdown of assemblylater.

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16

Section 4Prepare Parts for Assembly

Inspecting Tapered Roller BearingsInspect the cup, cone, rollers and cage of alltapered roller bearings in the assembly. If any ofthe following conditions exist, the bearing mustbe replaced:

• The center of the large diameter end of therollers are worn level with, or below thesurface.

• The center of the large diameter end of therollers are worn to a sharp edge. Figure 4.1.

• A visible roller groove in the cup or cone innerrace surfaces. The groove can be seen at thesmall or large diameter end of both parts.Figure 4.2.

• Deep cracks or breaks in the cup, cone innerrace or roller surfaces.

• Bright wear marks on the outer surface of theroller cage. Figure 4.3.

• Damage on rollers and on surfaces of the cupand cone inner race that touch the rollers.Figure 4.4.

Figure 4.3

Figure 4.2

Figure 4.1

Figure 4.4

WORN RADIUS

WORN SURFACE

CRACK WEAR GROOVES

WEAR MARKS

ETCHING & PITTING

17

Section 4Prepare Parts for Assembly

• Remove nicks, marks and burrs from partshaving machined or ground surfaces. Use afine file, India stone, emery cloth or crocuscloth for this purpose.

• Clean and repair threads of fasteners andholes. Use a die or tap of the correct size or afine file for this purpose.

CAUTIONThreads must be without damage and clean sothat accurate adjustment and correct torquevalues can be applied to fasteners and parts.

• Tighten all fasteners to correct torque values.

WARNINGDo not repair axle housings by bending orstraightening. Repair of axle housings by bendingor straightening can cause poor performance andpossible unsafe operation of the axle. This cancause serious personal injury.

Repair WeldingDo not repair weld drive axle assemblies. Repairwelding can detract from the structural integrity ofa component, particularly to heat treated partswhere the benefit of heat treatment can benullified by welding.

Removing Capscrews FastenedWith Liquid Adhesive

CAUTIONDo not use impact wrenches or strike componentswith a hammer.

To remove capscrews fastened with liquidadhesive, use the regular mechanical disassemblyprocedure.

If the removal of a capscrew, for example,becomes difficult due to a worn head or unusuallyhigh breakaway torque, the locking strength canbe reduced by heating the threaded area toapproximately 300°F (150°C). Heat slowly to avoidthermal stresses in components.

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• Damage on the cup and cone inner racesurfaces that touch the rollers. Figure 4.5.

Inspecting Planetary WheelEnd Components

Inspect the planetary reduction, planetary gears,sun gear and ring gear assembly for wear ordamage. Replace gears, shafts or thrust washersthat are scored, pitted, ridged, chipped or worn.

Repairing or Replacing PartsReplace worn or damaged parts of an axleassembly. The following are some examples tocheck for repair and possible replacement:

• Replace any fastener if corners of the head areworn.

• Replace washers if damaged.

• Replace gaskets, oil seals or grease seals at thetime of axle repair.

• Clean parts and apply new liquid gasketmaterial where required when axle isassembled.

Figure 4.5SPALLING & FLAKING

18

Section 4Prepare Parts for Assembly

NOTE: Do not apply liquid adhesive to thefastener. Trapped air in the threaded hole willcreate back pressure and “blow out” theadhesive as the fastener advances.

2. Apply Loctite® No. 277 adhesive to thethreaded holes only. Before threading in thefasteners, visually check to make sure that theadhesive contacts the threads. Figure 4.6.

3. Tighten the fasteners to the specific torquevalue recommended for the fastener. Loctite®

No. 277 will not alter the torque requirement.

NOTE: No cure time is required for Loctite® No.277 before rebuilding the axle and returning it toservice.

4. When servicing drive units assembled with Dri-Loc fasteners or with Loctite® No. 277 inthreaded holes where the fasteners do notrequire removal: Check each fastener fortightness by tightening the fastener to theminimum specified torque.

• If the fastener does not rotate, the fastener istightened to the correct torque.

• If the fastener rotates to any degree, remove itfrom the component and apply liquid adhesiveto the threaded hole.

Cleaning

WARNINGTo avoid serious personal injury, trichloroethylenemust not come in contact with your skin. Do notsmoke and avoid breathing vapors in closedrooms without ventilation. Do not usetrichloroethylene near flames, welding operationsor hot surfaces exceeding 900°F (482°C).

Clean the capscrew, nut or bolt tapped hole andfastener thread carefully. Use a cleaning solventsuch as trichloroethylene or equivalent to removedirt, oil, grease or moisture.

Using Dri-Loc Fasteners andAxleTech Liquid AdhesiveNOTE: Do not apply AxleTech liquid adhesive orany other type of fastener retainer material,sealant or adhesive on Dri-Loc fasteners or in thethreaded holes.

NOTE: No cure time is required for Dri-Locfasteners before rebuilding the axle and returningit to service.

1. Wipe excess oil residue from the threadedholes of all components that use Dri-Locfasteners.

2. Assemble the components that use Dri-Locfasteners.

3. Tighten the Dri-Loc fasteners to the specifiedtorque value.

Reusing Dri-Loc Fasteners andLoctite® No. 277

WARNINGTake care when using Loctite® to avoid seriouspersonal injury. Follow the manufacturer’sinstructions to prevent irritation to the eyes andskin. If Loctite® gets into your eyes, flush themwith water for 15 minutes. Have your eyeschecked by a doctor as soon as possible.

1. Wipe excess oil residue from the Dri-Locfasteners and threaded holes.

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Figure 4.6

19

Section 4Prepare Parts for Assembly

Applying Silicone GasketMaterialAxleTech recommends the following liquid gasketmaterials:

• ThreeBond 1216

• Loctite® 5699

WARNINGWhen you apply some silicone gasket materials,small amounts of acid vapor are present. Toprevent possible serious injury, the work areamust be well-ventilated. If the silicone gasketmaterial gets into your eyes, flush them withwater for 15 minutes. Have your eyes checked bya doctor as soon as possible.

CAUTIONThe amount of liquid gasket material applied mustnot exceed a 0.125 in. (3.18 mm) diameter bead.Too much gasket material can block lubricationpassages and result in damage to components.

1. Remove all old gasket material from bothsurfaces.

2. Clean the surfaces where liquid gasket materialwill be applied. Remove all oil, grease, dirt andmoisture.

3. Thoroughly dry both surfaces.

4. Apply approximately a 0.125 inch (3.18 mm)diameter continuous bead of liquid gasketmaterial around one surface.

Also apply gasket material around the edge of allfastener holes on that surface. Figure 4.7.

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5. Assemble the components quickly to permit thegasket material to compress evenly betweenparts.

6. Tighten the fasteners with the required torque.

Flushing Lube From the AxleNOTE: The rigid axle wheel end and housing bowlshare the same oil. Lubricant contamination of thewheel end or housing bowl can spread to all areasof the axle.

Flush lubricant from the entire axle, including thewheel ends and housing bowl, before you assemblethe axle.

Figure 4.7

0.125" (3.18 MM)DIAMETERSILICONE GASKETMATERIAL BEAD

20

Section 5Assembly

Installing the Spindle on Rigid Axles With P Series Cam Brakes

WARNINGTo prevent serious eye injury, always wear safeeye protection when you perform vehiclemaintenance or service.

1. Install two 4-inch long temporary studs intothe axle housing flange at the 1 and 11 o’clockpositions. Figure 5.1.

2. Apply a 0.125-inch diameter continuous beadof liquid gasket material around the flangemounting face of the axle housing.

WARNINGTake care when you use lifting devices. Whenyou use a lifting strap, inspect the strap fordamage before you use it. Do not use a liftingstrap to shock load or drop load a component.Serious personal injury and damage tocomponents can result.

3. Align the spindle and axle housing matchmarks. Install the spindle on the axle housing.If necessary, use an overhead crane to lift andsupport large spindles. Figure 5.2.

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4. Install and hand tighten the spindle mountingcapscrews and washers. Remove thetemporary studs and replace them withcapscrews and washers.

5. Tighten the capscrews according to the torquespecifications shown in Table A.

6. Replace the brake camshaft bushings andgrease seals in the spindle boss and camshaftbrackets. Refer to Maintenance Manual No. 4,Cam-Master® Cam Brakes. To order thispublication, call AxleTech’s Customer ServiceCenter at 877-547-3907.

7. Install the cam head thrust washer onto thecamshaft. Apply O-617-A or O-617-B chassisgrease to the camshaft bushings and journals.

8. Install the camshaft through the spindlebushings. Install the washers and slide thecamshaft through the air chamber supportbracket.

• For two-piece camshaft designs:Engage the coupling when you install thecamshafts.

Figure 5.2

GASKETMATERIAL

Table A: Spindle Mounting CapscrewTorque Specifications

TorqueSize lb-ft N•m3/4"-10 310-400 420-5427/8"-9 & 14 575-650 780-8811"-12 & 14 850-1100 1152-14911-1/4"-12 1700-2200 2305-29831"-8 (Nut on stud) 650-875 881-1186

Figure 5.1

T

21

Section 5Assembly

9. Install the slack adjuster, washers, and snapring. Connect the slack adjuster to the airchamber push rod yoke. Check that the snapring is installed to the camshaft at the innerface of the spindle boss.

Installing the Spindle on RigidAxles With Dry Disc Brakes1. For axle models that use capscrews to mount

the spindle: Install two 4-inch long temporarystuds into the axle housing flange at the 1 and11 o’clock positions. Figure 5.1.

2. Apply a 0.125-inch diameter continuous beadof liquid gasket material around the flangemounting face of the axle housing.

3. Align the spindle with the axle housing matchmarks to correctly position the brake calipermounting bosses. Install the spindle on theaxle housing.

4. Install and hand tighten the spindle mountingcapscrews and washers. Remove thetemporary studs and replace them withcapscrews and washers.

• For models with studs in the axle housing:Install washers and locknuts.

5. Tighten the capscrews or locknuts accordingto the torque specifications shown in Table B.

Installing the Spindle onSteering Axles With P SeriesCam BrakesNOTE: Install the differential carrier assembly andthe steering knuckles on the steering axles beforeperforming the following procedure.

1. Apply a thin coat of NLGI grade 1 or 2 greaseto the following areas:

• Oil seal lips and bushing bore in the end ofthe axle housing

• Axle shaft assembly seal and bushingjournals

CAUTIONAvoid damaging the housing oil seal when youinstall the shaft assembly. Lubricant loss anddamage to components can result.

2. Install the axle shaft assembly through thesteering knuckle and axle housing until the shaftengages the differential assembly side gear. Figure 5.3.

3. If the original shaft support bushing in the boreof the spindle is worn or damaged: Remove theoil seal and bushing and install a new bushing.

4. Install a new oil seal in the spindle bore. Apply athin coat of NLGI grade 1 or 2 grease to the seallips and bushing bore.

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Table B: Spindle Mounting Capscrew andLocknut Torque Specifications

TorqueSize lb-ft N•m3/4"-10 310-400 420-5427/8"-9 & 14 575-650 780-8811"-12 & 14 850-1100 1152-14911-1/4"-12 1700-2200 2305-29831"-8 (Nut on stud) 650-875 881-1186

Figure 5.3

T

22

Section 5Assembly

CAUTIONAvoid damaging the oil seal in the spindle whenyou install the spindle. Lubricant loss and damageto components can result.

5. Install the spindle on the steering knuckle bycarefully sliding it over the outer end of the axleshaft assembly.

6. Install the spindle mounting washers and nuts.Hand tighten the nuts.

7. Tighten the 3/4-inch-19 nuts to 310-400 lb-ft (420-542 N•m).

8. If you removed the brake shoes or camshaft:Install the brake shoes or camshaft. Refer toMaintenance Manual No. 4, Cam-Master®

Cam Brakes. To order this publication, callAxleTech’s Customer Service Center at 800-535-5560.

Installing the Spindle onSteering Axles With RSA Drum BrakesNOTE: Install the differential carrier assembly andthe steering knuckles on the steering axle beforeperforming the following procedure.

1. Apply a thin coating of NLGI grade 1 or 2grease to the following areas:

• Oil seal lips and bushing bore in the end ofthe axle housing

• Axle shaft assembly seal and bushingjournals

CAUTIONAvoid damaging the housing oil seal when youinstall the shaft assembly. Lubricant loss anddamage to components can result.

2. Install the axle shaft assembly through thesteering knuckle and axle housing until theshaft engages the differential assembly side gear.

3. If the original shaft support bushing in thebore of the spindle is worn or damaged:Remove the oil seal and bushing and install anew bushing.

4. Install a new oil seal in the spindle bore. Applya thin coat of NLGI grade 1 or 2 grease to theseal lips and bushing bore.

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! CAUTIONAvoid damaging the oil seal in the spindle whenyou install the spindle. Lubricant loss and damageto components can result.

5. Use a lifting device to install the spindle onto thesteering knuckle. Carefully slide the spindle overthe outer end of the axle shaft assembly andengage the two temporary guide studs.

6. Align the brake spider and brake shoeassembly with the spindle match marks.Install the brake spider and brake shoeassembly on the spindle. Refer toMaintenance Manual No. 4P, Stopmaster Off-Highway Heavy-Duty Brakes.

7. Install the spindle and brake spider mountingcapscrews and washers. Remove the twotemporary studs you installed duringdisassembly. Replace the temporary studswith capscrews and washers.

8. Tighten the 7/8-inch-14 capscrews andwashers to 575-650 lb-ft (780-881 N•m).

9. Install the air chamber assembly into thebrake spider. Refer to Maintenance ManualNo. 4P, Stopmaster Off-Highway Heavy-DutyBrakes.

10. Install the brake shoe return spring.

NOTE: Release the spring chamber after youfinish adjusting the wheel hub.

11. Connect the air lines to the correct ports inthe air chamber assembly.

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23

Section 5Assembly

Assembling the Hub, Bearings,Oil Seal and Drum or Rotor1. If the hub bearing cups need to be replaced,

install the new cups with a suitable driver.

NOTE: Most models require installation of theinner bearing cone prior to installation of thewheel hub oil seal into the bore of the wheel hub.

2. Apply lubricant to the inner bearing conerollers. Install the bearing cone into the wheel hub.

3. If used, install the oil seal guard washer.

4. Position the new wheel hub oil seal so that thespring lip of the seal faces the wheel bearing.Use a suitable seal driver to drive the seal intothe same location as the original wheel hub oilseal. Refer to the following list for threepossible seal installation locations:

• Bottom of the hub bore• Pushed-in until it contacts the guard washer• Flush with the end face of the hub

CAUTIONUse extreme care to avoid nicking the oil sealwear sleeve end when you install the oil sealwear sleeve. A nicked oil seal wear sleeve endcan damage the seal lip when you install thewheel hub. Lubricant loss and damage tocomponents can result.

5. If a sleeve is used, carefully install a new oilseal wear sleeve on the spindle.

6. Lubricate the seals in the following areas only.

• Conventional seals: Lubricate the oil seallips.

• Unitized seals: Lubricate the insidediameter of the seal.

• Face seals: Lubricate the contact surfaces ofthe metal rings. Do not apply lubricant toany other part of the face seal.

7. Apply a thin coat of lubricant to the oil sealjournal surface of the spindle.

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Installing the Axle Shaft inRigid Axle ModelsNOTE: If the axle uses a one piece shaft/sun gear,install the shaft/sun gear after adjusting the wheelbearings.

Install the axle shaft through the spindle bore andhousing until it engages the differential side gear.The shaft end with the snap ring groove mustextend beyond the outer end of the spindle.

Assembling the Ring Gear Hub AssemblyNOTE: When servicing an axle model with afloating ring gear, install the ring gearimmediately before you assemble the planetaryspider.

1. For axle models that include a planetary ringgear with tapped holes, lock plates andcapscrews: Assemble the ring gear to the ringgear hub. Figure 5.4.

2. Install the outer wheel bearing cone on the ringgear hub journal squarely against the hubshoulder. Apply the same lubricant used in thewheel ends to the rollers. Slip fit the bearingcone over the ring gear hub journal. Do notinstall the ring gear hub assembly on thespindle at this time.

Figure 5.4

RETAINER PLATERING GEAR

PLANETARY RING GEAR HUB OUTERWHEELBEARING

24

Section 5Assembly

8. Install the brake rotor or drum and oil slinger.

• If the slinger fits loosely between the huband drum: Apply a bead of liquid gasketmaterial to prevent rattling.

9. Install the drum or rotor mounting capscrewsand washers.

• For dual tire models: Align the air valvestem clearance notch in the drum outsidediameter with the wheel hub notch.

10. Tighten the capscrews according to thetorque specifications shown in Table C.

Installing the Wheel Hub

WARNINGTake care when you use lifting devices. Whenyou use a lifting strap, inspect the strap fordamage before you use it. Do not use a liftingstrap to shock load or drop load a component.Serious personal injury and damage tocomponents can result.

1. Use a lifting device to carefully lift and slidethe wheel hub assembly over the spindle.Keep the wheel hub assembly aligned with thespindle to avoid oil seal damage. Figure 5.5.

• For axle models with three threaded holes(5/8 inch-11 UNC) in the boss area nearthe outer wheel bearing: You cantemporarily attach the planetary ring gearhub assembly to the wheel hub prior toinstallation on the spindle.

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TorqueSize lb-ft N•m3/4"-10 310-400 420-5421"-12 850-1100 1152-14917/8"-14 575-750 780-1017

2. Install the ring gear hub assembly, whichincludes the outer bearing cone, on thespindle. Figure 5.4.

3. Install the wheel bearing adjusting nut on the spindle.

• If you temporarily attached the planetaryring gear hub assembly to the wheel hub inStep 1: Remove the temporary capscrewsfrom the ring gear hub.

Adjusting the Wheel Bearing PreloadNOTE: For wheel bearing adjustment proceduresfor axles equipped with wet disc brakes, refer toAxleTech Maintenance Manual No. 4L, Wet DiscBrakes. To order this publication, call AxleTech'sCustomer Service Center at 877-547-3907.

1. Tighten the wheel bearing adjusting nut to theinitial seating torque listed in Table D, whilerotating the wheel hub.

2. Continue to rotate the hub a minimum of onefull revolution in both directions.

Figure 5.5

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Table C: Brake Rotor Mounting CapscrewTorque Specifications

Table D: Wheel Bearing AdjustmenteuqroTtuNgnitsujdAgnireetSdigiR

elxAelxA tnemtsujdAlaniFgnitaeSlaitinIModels Models lb.-ft. N•m lb.-ft. N•m

PRC-1925 through 4807 PSC-1875 500 678 400 542SPRC & EPRC- through 45641926 through 4808

PRC-5324 through 7314 600 813 500 678647055949007)ekarbtew(4357-CRP

25

Section 5Assembly

2. Install the sun gear on the axle shaft andagainst the thrust washer.

• For a one piece axle shaft/sun gear: Installthe axle shaft/sun gear by engaging thedifferential side gear until the sun gear isagainst the thrust washer. Figure 5.6.

3. Install the snap ring into the axle shaft groove.

4. For axle models with a floating ring gear:Install the planetary ring gear onto the ringgear hub.

Assembling the PlanetarySpiderAxleTech’s planetary wheel ends come equippedwith three different planetary designs:

• Planetary pinion shaft with tapered rollerbearings

• Planetary pinion shaft with needle rollerbearings

• Nylon coated planetary pinion shafts

Follow the correct assembly procedure for thetype of planetary design you are servicing.

3. Tighten the wheel bearing adjusting nut againto the initial seating torque listed in Table D,while rotating the wheel hub in bothdirections.

4. Repeat Steps 1 and 2 until the adjusting nutwill not advance with the application of theinitial seating nut torque.

5. Loosen the adjusting nut 1/8 to 1/4 turn.

6. Tighten the adjusting nut to the finaladjustment nut torque listed in Table D whilerotating the wheel hub.

NOTE: Do not loosen the adjusting nut from thesetting in Step 6 when you install the adjustingnut lockplate. Loosening the adjusting nut canresult in an incorrect bearing preload.

7. Use one of the following procedures to installthe adjusting nut lockplate:

• Place the flat side of the lockplate against aflat surface of the nut.

or

• Place the lockplate notch over a corner ofthe adjusting nut.

If necessary, tighten the adjusting nut to align thelockplate holes with the threaded holes in thering gear hub. Do not loosen the adjusting nut.

WARNINGTake care when using Loctite® to avoid seriouspersonal injury. Follow the manufacturer’sinstructions to prevent irritation to the eyes andskin. If Loctite gets into your eyes, flush themwith water for 15 minutes. Have your eyeschecked by a doctor as soon as possible.

8. Install new lockplate capscrews with pre-applied locking agent on the threads. Ifyou use the original capscrews, apply 2 or 3drops of Loctite 277 or equivalent to theinternal threads of the ring gear hub. Tightenthe capscrews 60-75 lb-ft (81-102 N•m).

Installing the Planetary RingGear and Sun Gear 1. Apply grease to the inner face of the sun gear

thrust washer (the side with tangs or dowelpins). Install the thrust washer so that thetangs or dowels engage the slots or holes inthe wheel bearing adjusting nut.

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Figure 5.6

SUNGEAR

RINGGEAR

AXLESHAFT

T

T

T

T

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26

Section 5Assembly

Planetary Pinion Shaft WithTapered Roller Bearings1. Carefully inspect the planetary gears, pinion

shafts and planetary gear tapered rollerbearings. Replace damaged or worn parts.

2. If you removed the bearing cups, install newbearing cups with a suitable driver. To installthe new bearing cups, refer to the followingprocedure:

a. Install a snap ring into the groove on theinside diameter of the planetary gear.

b. Press one bearing cup into the planetarygear bore until it seats against the snapring. You must install the bearing cup intothe side of the gear closest to the snap ring.Use care to avoid pressing the cup throughthe snap ring.

c. Install the cup spacer against the snap ringin the other planetary gear end.

d. Press the other bearing cup into theplanetary gear bore until it seats against thecup spacer.

3. Install the bearing cones and bearing conespacer in the planetary gear bore.

• If you reuse the bearing cup and bearingcone: Assemble the bearing cup andbearing cone in the original position.

WARNINGObserve all WARNINGS and CAUTIONS providedby the press manufacturer concerning pressoperation to avoid serious personal injury andpossible damage to components duringassembly and installation procedures.

4. Support the planetary spider in a press, flangeside DOWN. Install the planetary gear andbearing assembly with the gear spacer towardthe small hole in the spider. Look through thehole in the spider to check that the bearingsand spacer align with the spider bores.

NOTE: You must place the spacer at the correctend of the planetary gear for correct gearalignment.

5. Place the ball in the hole on the large outsidediameter of the planetary pinion shaft.Carefully align the ball with the slot in theplanetary spider. Use grease to retain the ballin the hole during assembly.

!

6. Install the planetary pinion shaft by hand. Figure 5.7.

• If you cannot install the planetary pinionshaft by hand: Use a press to press-in theplanetary pinion shaft through theplanetary gear assembly until the shoulderof the pin bottoms-out. When a press is notavailable, use a brass drift and mallet to tapthe pinion shafts through the spider andplanetary gear assembly.

7. Install the planetary pinion shaft locknut andtighten to 485-600 lb-ft (658-813 N•m).

8. Repeat Steps 1-7 for the remaining shaft, gear,and bearing assemblies.

Planetary Pinion Shaft With NeedleRoller Bearings

NOTE: For maximum planetary gear life, changethe pinion shafts and needle roller bearings onboth wheel ends at the same time.

NOTE: The inner diameter of the inner thrustwasher is smaller than the outer thrust washer.

1. Apply approved O-617-A or B, NLGI grade 1 or2 grease to the side of the inner thrust washeropposite the tang. Place the greased side ofthe thrust washer toward the planetary gear.The thrust washer tangs fit into the spidergrooves.

Figure 5.7 PINIONSHAFT

SPACER

PLANETARYGEAR

BEARINGASSEMBLYWITH SNAPRING

T

27

Section 5Assembly

9. Install the pinion shaft through the spider, theplanetary gear and the thrust washers. Allowthe pinion shaft to extend out from spider. Donot press the pinion shaft into the spider atthis time. Figure 5.8.

10. Repeat Steps 1-9 to install the second andthird sets of pinion shafts, gears, needlerollers and thrust washers.

11. Check the alignment of the pinion shafts.

• Place the spider cover over the shaft ends.When necessary, rotate the shafts so thatspider cover fits over the flats. After youalign the shafts, remove the cover.

WARNINGObserve all WARNINGS and CAUTIONS providedby the press manufacturer concerning pressoperation to avoid serious personal injury andpossible damage to components duringassembly and installation procedures.

12. Install each pinion shaft into the spider gearassembly by hand.

• If you cannot install a pinion shaft into thespider gear assembly by hand: Use apress to install the pinion shaft into thespider assembly until the shoulder of theshaft bottoms against the inner (bottom)thrust washer. When a press is notavailable, use a brass drift and mallet toinstall the pinion shafts.

!

NOTE: Replace the needle roller bearings andplanetary gears when you replace the pinionshafts.

2. Place the thrust washer on the end of the newplanetary gear.

3. Apply approved O-617-A or B, NLGI grade 1 or2 grease to the bore of the planetary gear.

NOTE: Replace the needle roller bearings andplanetary gears when you replace the pinionshafts.

NOTE: The number of needle roller bearings usedin the pinion bore differs for each axle model.

4. Install a row of needle rollers around the borein the pinion and against the inner thrustwasher. Install as many rollers as will fit.

5. Place the spacer into the bore of the gear ontop of the needle rollers. Install another row ofneedle rollers on top of the spacer.

6. Apply approved O-617-A or B, NLGI grade 1 or2 grease to the side of the outer thrust washeropposite the tang.

7. Place the outer thrust washer on the end of theplanetary gear. The tang must align with thetang of the opposite washer.

8. Set the planetary spider on a level surface withthe flange side facing UP. Carefully slide theloaded planetary gear assembly into theplanetary spider. Check that the followingconditions exist before you proceed to Step 9:

• The outer thrust washer (large bore) mustbe on top of the gear assembly.

• The washer tangs must be in the planetaryspider grooves.

• The needle roller bearings must be inplace.

NOTE: You must align the pinion shaft so that theflat surface on the large end faces the outside ofthe spider. This alignment provides clearance forthe spider cover and prevents the shaft fromrotating when you install the spider cover.

Figure 5.8OUTERTHRUSTWASHER

NEEDLEROLLERS

SPACER

PLANETARYGEAR

NEEDLEROLLERS

INNERTHRUSTWASHER

PINIONSHAFT

28

Section 5Assembly

Nylon Coated Planetary Pinion Shaft

1. Inspect the large bore chamfers. The chamfersmust be smooth to prevent damage to thenylon coating on the planetary pinion shaftduring installation.

• If the large bore chamfers are not smooth:Use an emery cloth to clean the chamfersurface.

2. Inspect the planetary gear bores. Do not useplanetary gears with rough bore surfaces.

WARNINGObserve all WARNINGS and CAUTIONS providedby the press manufacturer concerning pressoperation to avoid serious personal injury andpossible damage to components duringassembly and installation procedures.

3. Place the spider in a press with the flange sideUP. Support the spider as required.

4. Install the inner thrust washer (small bore).Place the washer tab into the spider indentand align the washer bore with the spiderbore.

5. Apply a thin coat of the same gear lubricantused in the wheel end to the planetary gear bore.

6. Slide the planetary gear and the outer thrustwasher into the spider. Align the bores of theparts and place the outer thrust washer tabinto the spider indent.

7. Apply a thin coat of gear lube to the nyloncoating on the pinion shaft.

!

NOTE: You must align the pinion shaft so that theflat surface on the large end faces the outside ofthe hub circle. This alignment provides clearancefor the spider cover and prevents the shaft fromrotating when you install the spider cover.

8. Install the planetary pinion shaft in the spiderand through the planetary gear and thrustwasher. Allow the large end of the shaft toextend from the spider. Figure 5.9.

9. Repeat Steps 1-8 to install the second andthird sets of planetary pinion shafts, gearsand washers.

10. Check the alignment of the pinion shafts byplacing the spider cover over the shaft ends.When necessary, rotate the shafts so that thespider cover fits over the flats. After you alignthe shafts, remove the cover.

11. Install each pinion shaft into the spider gearassembly by hand.

• If you cannot install a pinion shaft into thespider gear assembly by hand: Use apress to install the pinion shaft into thespider assembly until the shoulder of theshaft bottoms against the inner (bottom)thrust washer. When a press is notavailable, use a brass drift and a mallet toinstall the pinion shafts.

Figure 5.9 SPIDER

OUTER THRUSTWASHER

PLANETARYGEAR

INNER THRUSTWASHER(SMALL BORE)

PINIONSHAFT

3. Correctly align the spider mounting holes withthe wheel hub holes or studs. Push the spiderassembly against the hub.

4. Install the nuts and washers or capscrews andwashers.

• To install studs with integral hex andwashers: Use a 3.25-inch internal depth,extra deep socket.

5. Tighten the wheel studs, capscrews or nutsaccording to the torque specifications shownin Table F.

Installing the Planetary Spider Cover1. Apply silicone (RTV) gasket material to the

cover flange at the spider mounting face. Referto “Applying Silicone Gasket Material” inSection 4.

2. Align the drain arrow on the spider cover withthe drain plug. Install the spider cover andcapscrews.

3. Tighten the cover capscrews to 85-115 lb-ft(115-156 N•m).

Adjusting the BrakesAdjust the brakes for axles with P series and RSAdrum brakes only.

• For P series brakes: Refer to MaintenanceManual No. 4, Cam-Master® Cam Brakes.

• For RSA brakes: Refer to Maintenance ManualNo. 4P, Stopmaster® Off-Highway Heavy DutyBrakes.

To order these publications, call AxleTech’sCustomer Service Center at 877-547-3907.

29

Section 5Assembly

Installing the Planetary Spider Assembly

WARNINGSmall amounts of acid vapor are present whenapplying some silicone gasket materials. Toprevent possible serious personal injury, makesure there is good ventilation in the work area. Ifthe silicone gasket material gets in your eyes,flush your eyes with water for 15 minutes. Haveyour eyes checked by a doctor.

CAUTIONUse only the correct gasket material. Do not usenon-approved gasket material. Lubricant lossand damage to components can result.

1. Apply silicone (RTV) gasket material to thespider flange at the hub mounting face. Referto “Silicone (RTV) Gasket MaterialApplication” in Section 3.

2. Install the spider and pinion assembly in thewheel hub. Align the planetary gear teeth withthe sun gear and ring gear teeth. Align thespider flange and wheel hub match marks youpreviously marked at disassembly. Figure 5.10.

!

!

Figure 5.10

T

T

Table F: Planetary Spider MountingCapscrew and Stud TorqueSpecifications

TorqueSize lb-ft N•m1/2"-13 85-115 115-1569/16"-12 130-165 176-2243/4"-10 310-400 420-5427/8"-14 575-750 780-1017

30

Section 5Assembly

Installing the Tires and Rims

1. Install the tires and rims. Secure them withwheel rim clamps, nuts and washers.

2. Tighten the wheel nuts according to thevehicle manufacturer's specifications.

Filling the Wheel Ends With Lubricant1. Rotate the wheel end until the oil fill line and

oil level line are parallel to the ground.

2. Lower the vehicle to the ground.

3. Remove the oil fill plug from the cover. Cleanall magnetic plugs and install the oil drain plugin the spider prior to filling the wheel end withlubricant.

NOTE: The rigid axle wheel end and housingbowl share the same oil and oil level.

4. Add oil to each wheel end and then to thebowl. Refer to Section 6 for lubricationspecifications. Do not add oil through the bowlonly. Wait for the oil to evenly distributethroughout the axle. Check the oil level andadd oil if necessary.

5. Replace and securely tighten all plugs.

Measuring and Adjusting the Toe SettingToe is the difference in distance between thefront of the front tires and the rear of the fronttires. Figure 5.11.

Check and adjust the toe setting after you installany of the following components:

• a front steering axle• a new steering knuckle• a tie rod component

AxleTech performs the toe adjustment with theaxle in an unloaded condition.

The toe specification for AxleTech off-highwaysteering axles is 1/16-inch toe-in (± 1/16-inch).This specification is based on a 24-inch radius(theoretical tire with a 48-inch outside diameter).

Figure 5.11

Y MINUS X EQUALS TOE-IN

X

YTOP VIEW

FORWARD

31

Section 5Assembly

Tandem and Tridem Axle Tire Matching

CAUTIONUnmatched tires on both tandem drive units andtridem drive units will cause tire wear andscuffing and possible damage to the drive units.AxleTech recommends that the tires be matchedto within 1/8 inch of the same rolling radius, 3/4inch of the same rolling circumference.

Tandem Units

The four largest tires should never be installed onone driving axle or the four smallest tires on theother driving axle. Such tire mounting will causean interaxle “fight,” unusually high axle lubricanttemperatures that result in premature lubricantbreakdown and possible costly axle service.

In addition to matching individual tire rolling radiior rolling circumference, AxleTech recommendsmatching, as nearly as possible, the total tirecircumference of one driving axle to the total tirecircumference of the other driving axle. This willusually result in satisfactory tandem axlelubricant temperatures that lengthen drive unitservice with higher tire mileage.

Tridem Units

When three driving axles are “hooked” togetherin a Tridem Series, unmatched tires willcompound the problems described in thepreceding paragraphs. AxleTech recommendsmatching, as nearly as possible, the total tirecircumference of each of the three driving axles.

How to Match TiresTandem UnitsPark the vehicle on a level floor. The vehicle mustcarry a correctly distributed rated capacity load.All the tires must be the same size. Measure newtires to verify that they will be correctly matched.

1. Inflate all tires to the same pressure.

2. Carefully measure the rolling circumference ofeach tire with a steel tape.

3. Mark the size on each tire with chalk andarrange the tires in order of size, largest tosmallest.

!

4. Mount the two largest tires on one side of oneaxle and mount the two smallest on theopposite side of the same axle.

5. Mount the four other tires on the other axle inthe same manner.

6. Test run the vehicle to gather accurate rearaxle lubricant temperature readings on thetwo axle lubricant temperature gauges.

7. Vary tire air pressure within the tiremanufacturer's recommended range so thelubricant temperature of both axles is within30°F (-1°C) of each other and not in excess of200°F (93°C). This will usually result inuniform tire loading and good tire life.

Tridem UnitsTo match tires on Tridem Units, follow the sameprocedure used for Tandem Units.

Arrange the tires in order of size:

• The two largest and two smallest go on oneaxle.

• The next two largest and smallest go on thesecond axle.

• The remaining four tires go on the third axle.

32

Section 6Lubrication

NOTE: Do not fill only through the axle housingbowl. For axles with a common level, fill the axleat each wheel end and the axle housing bowl tothe bottom of the fill/level plug hole with thespecified oil. Wait and allow the oil to flowthrough the axle. Check the oil level again and fillto the specified level if necessary.

NOTE: Refer to AxleTech Maintenance Manual No.1, Lubrication, for further lubrication information.To order this publication, call AxleTech’s CustomerService Center at 877-547-3907.

Lubrication ScheduleyawhgiH-ffOnoitarepO ➀

Initial Oil Change 250 operating hours➀

Check Oil Level 250 operating hours➀

Petroleum Oil 1,500 operating hours or twice a yearChange (whichever comes first)➀

Synthetic Oil or 3,000 operating hours or once a yearSemi-Synthetic Oil (whichever comes first)Change

➀ The interval depends on the individual operating conditions, speeds and loads. Severe operating conditions mayrequire more frequent intervals.

Lubrication SpecificationsOutside Temperature

MilitaryAxleTech Specification Oil

°F °C

Specifications Approval Description Min. Max. Min. Max.

enoN21-enoN01041/W58 EAS ,5-LGliO raeG ,A67-O

O-76D, Gear Oil MIL-L-2105D GL-5, SAE 80W/90 -15 None -26 None

O-76E, Gear Oil or GL-5, SAE 75W/90 -40 None -40 None

O-76L, Gear Oil MIL-PRF-2105-E GL-5, SAE 75W/140 -40 None -40 None

enoN04-enoN04-041/W57 EAS ,5-LGliO raeG ,M67-O

enoN04-enoN04-041/W57 EAS ,5-LGliO raeG ,N67-O

33

Section 7Specifications

Planetary Axle Wheel End Torque Specifications

Torque

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snoitacificepsMEO ot refeRtuN pmalC miR leehW1

2 Planetary Spider Cover Capscrew 1/2"-13 85-115 115-156

3 Planetary Spider Mounting Capscrew 1/2"-13 85-115 115-156

9/16"-12 130-165 176-224

3/4"-10 310-400 420-542

4 Planetary Spider Mounting Stud 3/4"-10 310-400 420-542

7/8"-14 575-750 780-1017

201-1857-0641-"61/7wercspaC etalpkcoL5

6 Wheel Bearing Adjusting Nut Refer to “Adjusting the Wheel Bearing Preload”in Section 5.

7 Wet Brake Driver Mounting Capscrew 7/8"-14 575-750 780-1017

1"-12 850-1100 1152-1491

8 Brake Drum Mounting Capscrew 3/4"-10 310-400 420-542

7/8"-14 575-750 780-1017

1"-12 850-1100 1152-1491

9 Brake Rotor Mounting Capscrew 3/4"-10 310-400 420-542

1"-12 850-1100 1152-1491

10 Spindle Mounting Capscrew 3/4"-10 310-400 420-542

7/8"-9 & 14 575-650 780-881

1"-12 & 14 850-1100 1152-1491

1-1/4"-12 1700-2200 2305-2983

6811-188578-0568-"1)duts no tuN(

11 Caliper Adapter to Spindle Bolt 7/8"-9 440-580 597-786

12 Caliper to Adapter Capscrew 3/4"-10 310-400 420-542

M20 369-479 500-650

13 Spindle to Steer Knuckle Stud Nut 3/4"-16 310-400 420-542

Spindle to Steer Knuckle Capscrew 7/8"-14 575-750 780-1017

318-856006-58421-"4/3-1tunkcoL tfahS noiniP41

745341-"4/3gulP niarD/leveL liO

Planetary Ring Gear Lock Capscrew 3/8"-16 35-50 47-68201-1857-0641-"61/7)nwohS toN(

34

Section 7Specifications

Rigid AxleWet Brake

Rigid AxleDrum Brake

Rigid AxleDry Disc Brake

Steer AxleDrum Brake

1

5

6

6

2

3

1

10

12

11

13

5

14

1

4

9 1

4

2

6

6

8

10

4 7

Notes

Notes

Suite 400 AxleTech International France AxleTech do Brasil Sistemas Automotivos Ltda.

3001 West Big Beaver Road 038 ,atsitaB oaoJ aidnevAnotnavreS naeJ euR ,4

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