INSTALLATIONAND

OPERATION MANUAL

R 5 SeriesModels 0010, 0012, 0016, 0021, 0160,

0400, 0502, 0630, 1000, 1600Single Stage Rotary Vane Vacuum Pumps

Page

GENERAL 2

Identification 2Operating Principles 2

1.0 INSTALLATION 21.1 Unpacking 21.2 Location 21.3 Power Requirements 21.4 Vacuum Connections and Drip Legs 31.5 Oil Filling 4

2.0 OPERATION 42.1 Start-up 42.2 Gas Ballast 52.3 Process Gas 52.4 Stopping Pump 52.5 Water-Cooled Pumps (optional) 52.6 Oxygen Service Pumps 5

3.0 ROUTINE MAINTENANCE 63.1 Pump Oil 63.1.1 Oil Level 63.1.2 Oil Type and Quantity 63.1.3 Oil and Filter Change 63.1.4 Flushing Procedure 73.2 Automotive-Type Oil Filter 83.3 Exhaust Filter 83.4 Vacuum Inlet Filter 83.5 Routine Maintenance Schedule 83.6 Overhaul Kit/Filter 9

4.0 TROUBLESHOOTING 9

5.0 LIMITED STANDARD WARRANTY 13

Illustration of R 5 0010/0016 14Parts Lists for R 5 0010/0016 15Illustration of R 5 0012/0021 16Parts List for R 5 0012/0021 17Illustration of R 5 0160 18Parts List for R 5 0160 19Illustration of R 5 0400 20Parts List for R 5 0400 21Illustration of R 5 0502/0630 22Parts List for R 5 0502/0630 23Illustration of R 5 1000/1600 24Parts List for R 5 1000/1600 25Technical Data and Typical Wiring Diagram for 1000 and 1600 Pumps 26Busch Factory Service Centers 27

We reserve the right to change the product at any time without any form of notification. The information in this pub-lication is accurate to the best of our ability at the time of printing. Busch, Inc. will not be responsible for errorsencountered when attempting to perform tasks outlined in this publication which is copyright protected.

TABLE OF CONTENTS

1

GENERAL

Identification

For model identification, see the nameplate mounted onthe side of the exhaust box.

This manual is written to cover RA, RB and RC versionsof models 0010, 0012, 0016, 0021, 0160, 0400, 0502,0630, 1000 and 1600 with a "B" ("A" on 0010 and 0016,"S" on 0021 and no letter designation on 0012) appear-ing as the seventh character in the model type number.For example, it would appear as follows:

RAXXXX-BXXX-XXXX

When ordering parts, it is helpful to include the identifi-cation code stamped into the side of the cylinder as wellas the serial number from the nameplate.

Example: RB0012-1029-XXXX

Operating Principles

All reference (Ref. XXX) numbers listed in the text andon illustrations throughout this manual are related to thedrawings and parts list shown later in this publication.

All R 5 Series, Single Stage, Rotary Vacuum Pumps aredirect-driven, air-cooled, oil-sealed, rotary vane pumpsthat operate as positive displacement pumps. Theyconsist of a rotor positioned eccentrically in a cylindricalstator (see Fig. 1). The rotor has three radially slidingvanes which divide the pump chamber into three seg-ments. The gas to be pumped enters at the inlet port,passes through the inlet screen and the open anti-suck-back valve into the pump chamber. As the rotor rotates,the inlet aperture is closed, the gas is compressed andforced out through the exhaust port. This operation isrepeated three times each revolution.

1.0 INSTALLATION

1.1 Unpacking

Inspect the box and pump carefully for any signs ofdamage incurred in transit. Since all pumps are ordi-narily shipped FOB our factory, such damage is the nor-mal responsibility of the carrier and should be reportedto them.

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Remove the nuts from the bottom of the box/crate andpull the pump out of the container, then unscrew thestuds from the bottom of the rubber feet.

The inlet port of the pump is covered with a plastic capprior to shipment to prevent dirt and other foreign mate-rial from entering the pump. Do not remove this coveruntil the pump is actually ready for connection to yoursystem.

1.2 Location

The pump must be installed in a horizontal position ona level surface so that the pump is evenly supported onits rubber feet. Allow at least one foot (five feet for 0400and larger pumps) of air space between the pump andany walls or other obstructions to the flow of cooling air.

Also, adequate ventilation must be provided for the fanson the pump and motor (i.e., do not locate the pump ina stagnant air location).

Whenever the pump is transported, be sure to drain theoil prior to shipping to avoid vane breakage whenrestarting the pump.

Do not tip the pump over if it is filled with oil.

Locate the pump for easy access to the oil sight glass(Ref. 83) in order to inspect and control the oil levelproperly. Allow clearance at the exhaust flange area toprovide service access to the exhaust filters.

1.3 Power Requirements

The schematic diagram for the electrical connection islocated in the junction box or on the nameplate of thepump motor.

The motor must be connected according to the electri-cal codes governing the installation. The power supplymust be routed through a fused switch to protect themotor against electrical or mechanical overloads. Themotor starter must be set consistent with the motor cur-rent listed on the motor nameplate.

Note: Soft starting means are required for the motorsof models 1000 and 1600. Using an across-the-linetype of starter could possibly cause coupling and/orpump failure.

CAUTION: On 0400/0502/0630 models, aswitch mounted near the exhaust port andon top of the exhaust box is a safety device.This switch is used to shut off the pump inthe event the pump oil chamber is over-heated. Wire this normally closed switchinto the starter control circuit so that whenthe switch reaches the set point, power tothe pump motor is discontinued.

All R 5 series pumps are designed to handle air.Vapor in the air stream can be tolerated when thepump is operated within certain operating parametersas defined by Busch, Inc. Engineering (see Section2.2 - Gas Ballast). When you desire to use the pumpon an air stream that contains vapors, contact Busch,Inc. Engineering for operating recommendations; oth-erwise, the warranty could be void.

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If the pump is supplied with a manual motor starter, it ispreset at the factory in accordance with the customer’sspecification. For other voltage requirements, contactthe factory for motor and/or starter information.

Note: See the motor manufacturer’s manual for start-up maintenance of the motor.

Correct direction of rotation is marked by an arrow onthe motor fan housing and is counterclockwise whenlooking at the motor from the motor's fan side.

1.4 Vacuum Connections and Drip Legs

Use a line size to the vacuum system that is at least aslarge as that of the pump inlet. Smaller lines will resultin lower pumping speeds than the rated values.

Install a drip leg and drain on the vertical pipe near thepump inlet. Also, when installing discharge piping, adrip leg should be installed. Drain the drip legs often toremove any condensation which may have collected.

If more than one vacuum pump or a receiver tank isconnected to a common main line, each pump shouldhave its own manual or automatic operated shut-offvalve or positive action check valve. The built-in, anti-suck-back valve should not be used as a shut-off valvefor the vacuum system.

Remove the plastic protective cap from the inlet portprior to connection of the pump to the system. Verticalconnection of the vacuum line can be made directly tothe pump inlet (Ref. 260).

CAUTION: After the electrical connectionhas been made, but before the pump isfilled with oil, the rotation of the motormust be checked. Open the inlet port andjog the motor briefly to make sure rotationis correct. If it runs backwards and if it iswired three phase power, reverse any twoleads of the three at the power connection.

CAUTION: When using PVC pipe or any stat-ic enhancing material for the exhaust pip-ing, make provisions to safeguard againstarcing from static electricity. Arcing canignite oil vapor that may be present.

CAUTION: Do not use the anti-suck-backvalve as a system check valve.

Exhaust

InletExhaust filter

Gas ballast(RA)

Rotor

Anti-suckback valve

Inlet screen

Vane

Automotive typespin-on filter Main oil feed line

Exhaust valve (RA)

Oil return valve (RA)

Oil sight glass

Oil return line toinlet (RC)

Fig. 1 - Basic R 5 Pump

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Type and size of the inlet connections of the R 5 Seriespumps are shown in the TECHNICAL DATA page 26.

If the gas that is pumped contains dust or other foreignsolid particles, a suitable inlet filter (10 micron rating orless) should be connected to the inlet port. Consult thefactory for recommendations.

1.5 Oil Filling

The pump is shipped without oil. After level installation,and after correct rotation has been established, fill thepump with the recommended vacuum oil through the oilfilling port (Ref. 88), observing the "MAX" and "MIN"position at the oil sight glass (Ref. 83). On pumps withtwo sight glasses, fill the top glass up to the 3/4 mark.Non-detergent oil should be used. Do not usedetergent motor oil as additives in detergent oil willplug exhaust filter elements and shorten their life.

It is recommended that Busch R500 Series oil be usedto receive the best performance from your vacuumequipment. R500 Series oil is a high quality vacuum oilthat will give longer running time between oil changes,will provide better lubrication at high operating temper-atures, and will prolong the life of exhaust filter ele-ments. This oil can be obtained directly from Busch,Inc. in Virginia Beach, Virginia.

The strict use of Busch oils and parts from the day ofpurchase can extend the Limited Standard Warranty tothree years. Contact Busch, Inc. in Virginia Beach,Virginia for details.

For general applications, use R530 in all models cov-ered by this manual, except for the 0021 model, whichshould use R580. Use R590 or R570 in pumps that areoperated in high ambient temperatures (above 90°F) orhigh operating pressure when the oil carbonizes (turnsblack) before the change interval. Contact the factoryfor recommendations when using other oils.

The TECHNICAL DATA chart on page 26 gives theapproximate quantities of oil required for each pump.The oil capacity chart should only be used as a guide,since oil capacity may be slightly lower, depending onwhether the pump was filled previously, and whether allcomponents such as oil filter, oil lines, etc., were

allowed to completely drain. Use only the sight glassreading for proper level. Never overfill!

For ambient operating temperatures lower than 41°F,use Busch R580 synthetic oil. If this does not help(where the pump has difficulty starting due to high oilviscosity), contact the factory in Virginia Beach,Virginia.

Replace the oil fill plug (Ref. 88), making sure that thegasket (Ref. 89) is in place and properly seated andsecured. Some pumps are equipped with an exhaustpressure gauge as an integral part of the oil fill plug.

2.0 OPERATION

2.1 Start-up

Check rotation of the motor as described in Section 1.3.

Fill the pump with oil as described in Section 1.5.

Start the pump and immediately close the inlet. Run thepump for a few minutes before checking the oil levelagain. With the pump shut off, the oil level should bevisible in the oil sight glass (Ref. 83), between the "MIN"and "MAX" mark.

On pumps with two sight glasses, with the pump shutoff, the oil level should be visible in the upper oil sightglass, between the "MIN" and "MAX" mark.

Add oil, if necessary, but only add it when the pump hasbeen shut off and the circulating oil has had sufficienttime to return to the oil sump.

Note: The oil separated by the exhaust filter elementforms droplets on the outside of the exhaust filter thatcollect at a low point in the upper half of the exhaustbox. From there the collected oil is drained back to theoil sump via an oil return valve (Ref. 275), which openson R 5 RA/RB model pumps when the pump is shut off.It is necessary to shut off the pump (all RA modelpumps and RB0021 model pumps) after every 8 hoursof operation to allow the check valve to open. If thepump is not shut off after this time period, it is possibleto starve the pump of oil since the oil is not allowed todrain back into the oil sump and/or oil droplets may beblown out of the exhaust. If the pump is operating athigh pressure, it may be necessary to shut it downsooner than 8 hours.

On R 5 (Standard) RC model pumps, the collected oil isdrawn continuously during operation of the vacuumpump to the inlet flange (Ref. 260) via the oil return line(Ref. 290). The oil return line is connected directly tothe area of the exhaust box, downstream of the exhaustfilter, which is at atmospheric pressure. Therefore, aconstant amount of air is sucked into the pump, whichis an additional reason that the R 5 Standard Series

WARNING: Do not use hydrocarbon oils inpumps on oxygen service. See Section 2.6- Oxygen Service Pumps.

WARNING: Keep the oil fill plug tight aspressure in the exhaust box could causebodily injury if the plug is blown out. Do notfill/add the pump with oil through theexhaust/inlet ports as there is danger ofbreaking the vanes!

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Pumps do not achieve as low a vacuum as the R 5Series Super Vacuum Pumps. RC model pumps canrun continuously without having to shut them off for theoil to drain back.

2.2 Gas Ballast

All RA Series pumps are equipped with a gas ballastvalve. The gas ballast valve (Ref. 440) is locatedbetween the inlet port and the exhaust box. RA0010and RA0016 pumps are equipped with a permanentgas ballast which cannot be shut off unless the sinteredfilter is removed and the orifice plugged. PumpsRA0160 thru RA1600 are equipped with an adjustablegas ballast valve.

The adjustable gas ballast valve should normally be leftopen. Its primary function is to prevent water vaporfrom condensing in the pump. Condensation causesemulsification of the oil, loss of lubricity, and possiblerotor seizure.

2.3 Process Gas

The R 5 series pumps are designed to pump air and arenot intended for use when water vapor is beingpumped. In some applications, when the quantity of thewater vapor is moderate, R 5 pumps have been usedwith good results. On these occasions, the pump is rununtil it is up to operating temperature before it is allowedto pump the process gas. The pump is also operatedfor a period of time off process and on air (to clear it ofprocess gas) before it is shut down. This operatingtechnique prevents the vapor from condensing in thepump. Before attempting to pump a gas laden withwater vapor, contact Busch Engineering for advice.

2.4 Stopping Pump

To stop the pump, turn off the power. The pump has abuilt-in, anti-suck-back valve (Ref. 251 thru 255) to pre-vent the pump from rotating backwards when it is shutoff.

Install an automatic operated valve (such as a checkvalve) in front of the pump, if more than one pump ispumping on the same line or if there is a sufficient vol-ume of vacuum in the system to cause the pump oil tobe drawn into the piping when that pump is shut down.

All R 5 Series pumps are vented internally to atmos-pheric pressure through venting holes that are next tothe exhaust valve assembly.

2.5 Water-Cooled Pumps (optional)

Water-cooled pumps are cooled by circulating the oilthrough a shell-and-tube type heat exchanger. The cir-culation of the pump oil through the shell is created byvacuum in the pump, but the circulation of the coolingwater through the tubes is thermostatically controlled.The flow rate of the cooling water is controlled by a ther-mostatically activated valve (see Fig. 2) that senses,through a capillary bulb mounted in the exhaust box,the pump's oil temperature as it is discharged from thecompression chamber. The valve will open at its setpoint and close at approximately 3°F to 5°F below theset point.

The valve set point is adjustable as follows:

(a) Rotate the valve adjustment screw counterclock-wise to cause the valve to open at a higher tempera-ture. This makes the pump run hotter.

(b) Rotate the valve adjustment screw clockwise tomake the valve open at a lower temperature. Thismakes the pump run cooler.

The thermostatic valve can be manually opened byinserting a screwdriver under each side of the springguide and prying the spring and guide upward awayfrom the valve body.

The water cooling option can be used to cool pumpsoperating in high ambient temperatures, or it can beused to maintain a pump at elevated temperatures toprevent condensation inside the pump in wet applica-tions. Contact Busch Engineering in for details.

2.6 Oxygen Service Pumps

Oxygen service pumps must be used in oxygenenriched applications that are defined as any applica-tion which has a process gas that is 25% or more oxy-gen. If this pump is contaminated by organic com-pounds, do not attempt to use it on oxygen service untilit has been decontaminated.

CAUTION: Do not use the anti-suck-backvalve as a check or shut-off valve for yourvacuum system. Do not depend on the anti-suck-back valve to prevent pump oil frommigrating through the inlet into the systemwhen the pump is shut down.

Fig. 2 - Water-cooled Pump

Thermostaticvalve

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These pumps have been manufactured, solventwashed (to remove organic contaminants) and assem-bled according to the latest technical standards andsafety regulations. If this pump is not installed properlyor not used as directed, a dangerous situation or dam-age might occur. It is mandatory that these operatinginstructions be read and understood prior to vacuumpump installation and start-up!

For overhaul/repair of oxygen service pumps,Busch Inc. strongly recommends that all major repairoperations be conducted at the factory. Improperhandling of repairs could result in extremedanger to personnel operating the pump.

3.0 ROUTINE MAINTENANCE

R 5 Series pumps require very little maintenance; how-ever, to insure optimum pump performance, the follow-ing steps are recommended.

3.1 Pump Oil

3.1.1 Oil Level

With the pump installed relatively level, make sure thatthere is sufficient clean oil in the pump. The oil levelshould be observed on a daily basis and/or after 8hours of operation and should be replenished if it dropsbelow the 1/4 mark on the oil sight glass on pumps withone sight glass or below the 1/4 mark on the upper oilsight glass on pumps with two sight glasses.

On RA/RB Series pumps, you must first shut the pumpoff in order to let the oil flow back into the oil sump priorto checking the sight glass. Allow sufficient time for theoil to drain back into the sump on RA/RB Series pumpsprior to adding oil, or overfilling could result.

Oil level readings should be done only when the pumpis turned off. Oil can be added to the oil fill port (Ref.88) if the pump is shut off and the circulating oil has suf-ficient time to return to the oil sump. The oil mightappear to be foamy, which is a normal phenomenonwith aerated oil.

Under normal circumstances, it should not be neces-sary to add or drain oil from the pump between recom-mended oil changes.

A significant drop in oil level means there is an oil leakor that an exhaust filter is broken. The pump should besmoking excessively. It is normal for the oil to be foamyand light in color in an operating pump. However, if theoil is milky colored, it is an indication that water is pres-ent in the oil. Normally, by operating the pump for anextended period, with the inlet suction blanked off andthe gas ballast open on RA pumps, the water will bepurged from the oil. If the oil is dark colored, it is con-taminated or carbonized and must be changed.Depending on the severity of the contamination, a thor-ough flushing may be needed. Contact the factory forflushing oil (Busch R568) and refer to Section 3.1.4.

3.1.2 Oil Type and Quantity

See Section 1.5 for details on oil type and quantity.

3.1.3 Oil and Filter Change

Oil life is dependent upon the conditions to which it isexposed. A clean, dry air stream and an oil operatingtemperature under 210°F are ideal conditions. Whenusing R530 (hydrocarbon oil), it is recommended thatoil changes are made every three (3) to four (4) monthsor 500 to 750 hours of operation, or as necessary if highheat is contaminating the oil. The use of Busch R570or R590 synthetic oils could extend the operating hoursbetween oil changes under ideal conditions. Oil sam-ples should be taken regularly when exceeding the 500-750 hour recommendation.

Excessive Heat

When the pump is subjected to operating conditionsthat will cause the oil to be heated above 235°F, the oilwill carbonize and become contaminated after a rela-tively low number of operating hours. The higher the

WARNING: This pump is filled with a specialoperating fluid. Do not use any other typeof fluid, oil and/or grease. Use one of thefollowing:

• Fomblin LC 250• Tyreno Fluid 12/25V (perfluorinated polyether)• KRYTOX ® Vacuum pump fluid by Du Pont Company

If you have any questions, please phone ourCustomer Service Department for more information.

CAUTION: Do not add oil while the pump isrunning since hot oil vapor may escapethrough the oil fill port.

CAUTION: When changing the oil and fil-ters, it may be necessary to flush the pumpto remove any build-up of degraded oil fromthe sumps, oil lines, radiators, etc., toensure proper oil flow through the pump.Reduced oil flow, especially through radia-tors and cooling coils, can cause mechani-cal damage or extreme overheating, whichcould cause the oil vapors to ignite.

CAUTION: Insufficient oil quantity in thepump has the potential, under certain con-ditions, to lead to self-ignition of theremaining oil in the pump.

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temperature, the quicker the oil becomes contaminated.If the oil temperature is too severe, Busch R570 orR590 synthetic oil should be used to withstand the ele-vated temperatures. If synthetic oil is used, the pumpshould be flushed with Busch R568 oil as outlined in theMaintenance and Repair Manual. Auxiliary oil cooling isthe most practical approach to a severe heating prob-lem.

Contaminated Air Stream

When the air stream contains a solid and/or liquid thatcan contaminate the oil, it must be changed more often.If the air stream contains a small percentage of con-taminates and/or they are slightly aggressive* (mildacids, etc.), synthetic oil, such as Busch R570, willresist breakdown better than the standard Busch R530.The solution is to install a filter or knock-out pot to keepthe contaminates out of the pump.

*Process air streams with a large percentage of contaminates and/ormore than slightly aggressive contaminates must use a once-through-sealant or dry-type pump.

Oil change intervals can only be established by experi-ence with the pump operating in the actual conditions(see previous paragraph for some of the conditions).Develop the oil change interval by periodically checkingan oil sample removed from the pump. When the oilsample has become dark in color (from solids and car-bonized particles) or is milky looking (from water), it istime to discard it. As mentioned before, a thoroughflushing may be required.

3.1.4 Oil Flushing Procedure

Flushing is needed under certain conditions. Somepumps will be beyond flushing and will need to be over-hauled.

To help determine if flushing is needed, observe thecondition of the oil as it is drained from the pump. Is itblack and tar like or contaminated in any way? Was thepump noisy, overheating, or was the motor overloadshutting the pump off? How old is the pump and whenwas the last time the oil was changed?

If the above conditions exist or you don't know when thelast oil change was performed further investigation isneeded. Also, when changing from one oil type such asR530 to another type such as R590 or R570 it will bebeneficial to flush. Although the oils are compatible,mixing a lesser grade oil such as R530 with a syntheticoil like R570 will reduce the effectiveness of the syn-thetic oil.

All of the oil will be removed and replaced with theflushing oil (Busch R-568), and eventually that will bereplaced by whatever Busch oil is needed for your par-ticular application. Have enough oil and oil filters on

hand for a couple of flushes. The following describesthe steps in the flushing procedure:

Shut the pump off and drain all the oil from the pumpand remove the access plates (Ref. 205) from theexhaust box (Ref. 075). Remove the metal baffle (Ref.078) and take a good look at the internal walls of the oilsump. If the walls are discolored but have no build upof any kind one can proceed with the flushing. If gelledor burnt oil is clinging to the walls this material must bescraped and removed prior to flushing. Proceed byscraping and cleaning as much of the exhaust box aspossible. The more debris that is removed now themore effective the flushing will be later. Re-install themetal baffle, cover and proceed with the flushing. Atthis point one must remember that the oil lines and oilcooler might also be plugged to a point where noamount of flushing will make a difference and a com-plete overhaul will be the only option. Depending onthe severity of the oil contamination flushing may be alast ditch effort.

Drain all of the oil from the pump. The more contami-nated oil you remove now the more effective the oilflushing will be.

Remove the oil filter (Ref. 100) and install a new one. Itis recommended that you do not change the exhaust fil-ter or filters until after the flushing to prevent contami-nation of any new filters.

Fill the exhaust box with the proper amount of flushingoil (Busch R-568).

If possible run the pump with the inlet closed and off ofthe process. Run the pump for approximately six hours,shut the pump off and drain a small sample of oil into aclear container.

Examine it. If it is clear to amber run the pump foranother six hours and examine it again. If after the firstsix hours it is black drain it and fill again using anothernew oil filter.

If after the second flushing the oil still remains black thepump may have too much contaminated oil in it to flushout properly. There may be residue remaining in thelines and cooler that will not flush out. An overhaul willbe necessary.

If after the second six hour period the oil still remainsclear to amber in color drain it, change the oil filter andfill with the regular oil. At this point also change theexhaust filters.

Run the pump with a fresh charge of the oil to be usedin your application (not R-568), and monitor the operat-ing conditions closely. Check for noise, overheatingand oil condition until a regular oil change schedule canbe established.

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Do not let the oil turn black. Change it before it fails. Ifthe oil is kept in good condition the pump will last foryears. If the oil starts to turn black do not hesitate toflush again. Keeping on top of the oil changes will pre-vent costly overhauls.

If you are just switching from one type of oil to anothera single six hour flush is all that is necessary (follow theabove instructions). Remember to change to a newexhaust filter or filters after the flushing and not before.

3.2 Automotive-Type Oil Filter

The 0160 - 0630 Series pumps are equipped with anautomotive-type oil filter (Ref. 100). The 1000/1600Series has two automotive-type filters. The 0010 thru0021 are not equipped with an automotive-type oil filter.When replacing the automotive-type oil filter, use only agenuine Busch filter.

Note: Make sure to tighten the Busch oil filter secure-ly against the aluminum sealing surface so that leakswill not occur.

3.3 Exhaust Filter

Every nine (9) to twelve (12) months, or as necessary,replace the exhaust filter elements. The service life ofthe exhaust filters varies widely with pump application.It is only necessary to change the filters when the ele-ments become clogged with foreign material or burnedoil. Indications of clogged filters are smoke and oil mistcoming from the pump exhaust, higher than normalmotor current or oil leaking from the gas ballast valveon RA models.

A pressure gauge (Ref. 90) is supplied with your R 5vacuum pump as part of the oil fill plug. This gauge hasa green field and a red field. Pressure within the greenfield would indicate normal pressure. Pressure in thered field (for a continuos period of time) requires animmediate change of the exhaust filter(s).

In order to replace the filter, remove the screws retain-ing the exhaust port cover plate. Pull the housing offthe exhaust box; set it aside. Use a slotted head screwdriver to loosen the exhaust filter retaining spring (Ref.125), then rotate and remove the spring (see Fig. 3).Pull the filter cartridge (Ref. 120) out of the exhaust box.

To field test an exhaust filter element, remove it fromthe pump, allow it to cool, clean the sealing end (or O-ring end), and use compressed air to blow through theelement. Apply approximately 3 to 6 psi (maximumallowable operating pressure across the filter).

Use a clean shop rag to seal off the connectionbetween the air hose and the filter. If you can blowthrough it, the element is not plugged. If plugged, dis-card it and install a new one. The filter cannot becleaned successfully. Visually inspect the filter elementfor cracks.

Reinstall the filter elements. Make sure the open end ofthe element is properly seated down in its recess in theexhaust box with the O-ring (Ref. 121) correctly posi-tioned. Retain the filter with the spring clip, tighten thetension screw until the filter is secure. Place theexhaust port gasket and cover in position on theexhaust box and retain with the cap screws.

3.4 Vacuum Inlet Filter

If the pump is equipped with a special vacuum inlet fil-ter in applications where powder, dust or grit is present,the filter cartridge should be cleaned on a weekly basis,or as required, depending on the amount of foreign par-ticles to which the pump is exposed.

3.5 Routine Maintenance Schedule

See the motor manufacturer’s manual for the periodicmotor maintenance.

Daily: Visually check oil level (see 3.1.1 and 3.1.2).

WARNING: Do not inhale through the filteror allow your mouth to come in direct con-tact with the filter.

Fig. 3 - Removing the Filter Spring

WARNING: If the gas entering this pump isa health hazard, use rubber gloves and allnecessary personal protection equipmentwhen performing the exhaust filter replace-ment operation.

WARNING: Wear safety glasses wheninstalling or removing the spring retainers.The retainers can, if not secured correctly,slip off and fly out of the exhaust box.

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Weekly: Check oil for contamination (see 3.1.3).Inspect inlet filter (see 3.4).

Every three (3) or four (4) months, 500 to 750hours of operation, or as necessary: See 3.1.3and 1.5. Drain and discard oil from the hot pump.Replace the automotive-type oil filter (not applicable onthe 0010, 0012, 0016 and 0021) and refill with fresh oilthrough the fill plug (see 3.1.2 through 3.1.3 and 3.2).

Every nine (9) to twelve (12) months, or asnecessary: Replace exhaust filter elements (see3.3).

As necessary: Check and/or clean the standard inletscreen. If the optional inlet filter is used, replace the fil-ter material as practice determines.

The oil cooling coils (Ref. 240 on models 0012 through0400), the oil cooler (Ref. 241 on models 0502 through1600) and any motor or pump grill covers on all modelsshould be inspected regularly for debris. Clean as nec-essary. Soiling prevents cool air intake or movementand may lead to overheating of the pump.

Drain drips legs on inlet and exhaust piping.

3.6 Overhaul Kit/Filter

An overhaul kit containing a set of gaskets and O-rings,vanes, bearings and bearing sleeves, shaft seals andtaper pins, is available from the factory.

Also, a filter kit containing oil drain plug, gaskets, auto-motive-type oil filter (except 0010, 0012, 0016 and0021), exhaust filter, and synthetic baffle strainer(where applicable), is available from the factory.

When ordering, please specify pump size and model (a4-digit suffix after size), and serial number.

4.0 TROUBLESHOOTING

4.1 Trouble

Pump does not reach "blank-off" pressure,which is the lowest absolute pressure (bestvacuum) when running with the inlet closedvia a blank flange or a valve; or the pumptakes too long to evacuate the system.Blank-off pressure can be measured byusing a good quality capsule gauge.

Possible Cause:

Contaminated oil is the most common cause of notreaching the ultimate pressure.

Remedy:

Shut off pump, after operating temperature has beenreached, drain the warm oil from pump and exchangeautomotive-type oil filter (where applicable), if neces-sary. Flush and fill pump with new oil and take newblank-off measurement after operating temperature isreached (at least 20-30 minutes).

Possible Cause:

Vacuum system or vacuum piping not leak-tight.

Remedy:

Check hose and pipe connections for possible leak.

Possible Cause:

Wire mesh inlet screen plugged (Ref. 261).

Remedy:

Clean wire mesh inlet screen. Install inlet filter if prob-lem repeats frequently.

Possible Cause:

No oil or not enough oil in oil reservoir.

Remedy:

Shut off the pump, add the necessary oil, or if oil seemscontaminated, drain balance of oil from pump,exchange automotive oil filter, and refill with fresh oil.Flush if necessary.

Possible Cause:

Automotive-type oil filter is dirty or clogged (whereapplicable).

Remedy:

Replace automotive-type oil filter, exchange oil, if nec-essary, and refill with fresh oil.

Possible Cause:

Inlet valve plate (Ref. 251) stuck in closed or partiallyopen position due to contamination.

Remedy:

Disassemble inlet valve and screen. Clean as required.

Possible Cause:

Oil tubing plugged and/or leaking.

10

Remedy:

Replace, clean and/or retighten the oil fittings. Replaceonly with same size tubing.

Possible Cause:

Shaft seal leaking.

Remedy:

Replace the shaft seal following disassembly andassembly steps outlined in the Maintenance and RepairManual. Check the shaft seal. It should have a springinstalled inside and around the shaft sealing lip.

Possible Cause:

Exhaust valve (Ref. 159) is not properly seated or it ispartially stuck open (RA models only).

Remedy:

Follow disassembly and assembly steps outlined in theMaintenance and Repair Manual.

Possible Cause:

Vanes are blocked in the rotor or they are damaged.

Remedy:

Free vanes or replace with new ones following disas-sembly and assembly steps outlined in theMaintenance and Repair Manual.

Possible Cause:

Radial clearance between the rotor and cylinder is nolonger adequate.

Remedy:

Follow disassembly and assembly steps outlined in theMaintenance and Repair Manual on resetting the radialclearance correctly.

Possible Cause:

Internal parts worn or damaged.

Remedy:

Follow disassembly and assembly steps outlined in theMaintenance and Repair Manual and replace worn ordamaged parts.

4.2 Trouble

Pump will not start.

Possible Cause:

Motor does not have proper supply voltage or is over-loaded; motor starter overload settings are too low orwrong setting; fuses are burned; or wire is too small ortoo long, causing a voltage drop to the motor.

Remedy:

Check correct supply voltage; check overload settingsin motor starter for size and setting according to motornameplate data; check fuses; and install proper sizewire. If ambient temperature is high, use larger sizeoverloads or adjust setting 5% above nominal motornameplate value.

Possible Cause:

Pump or motor is blocked.

Remedy:

Remove fan cover and try to turn pump and motor byhand. If frozen, remove motor from pump and checkmotor and pump separately. If pump is frozen, disas-semble completely per the Maintenance and RepairManual and remove foreign objects in the pump orreplace broken vanes.

4.3 Trouble

Pump starts, but labors and draws a veryhigh current.

Possible Cause:

Oil too heavy (viscosity too high) or ambient tempera-ture below 5 degrees C (41°F).

Remedy:

Change to R580 vacuum oil if very cold, or warm up oilbefore starting the pump.

Possible Cause:

Pump runs in the wrong direction.

Remedy:

Check for correct rotation which is counterclockwisewhen looking at the motor from the motor's fan side.

Possible Cause:

Pump is overfilled with oil or wrong kind of oil is used.

Remedy:

Correct the oil level and quality per Section 1.5 and use

recommended motor oil.

Possible Cause:

Exhaust filters in exhaust chamber are clogged andappear burned black with pump oil.

Remedy:

Replace exhaust filters, maintain proper oil condition,oil level, and use only Busch recommended vacuum oil.

Possible Cause:

The exhaust filter is clogged due to process material.

Remedy:

Contact the factory in Virginia Beach, Va. for recom-mendations.

Possible Cause:

Loose connection in motor terminal box; not all motorcoils are properly connected. Motor operates on twophases only.

Remedy:

Check motor wiring diagram for proper hookup, espe-cially on motors with six internal motor windings, tight-en and/or replace loose connections.

Possible Cause:

Foreign particle in pump; vanes broken; bearing seiz-ing.

Remedy:

Follow disassembly and assembly steps outlined in theMaintenance and Repair Manual and remove foreignparts, and replace vanes and bearings.

4.4 Trouble

Pump discharges smoke at the exhaust portor expels oil droplets from the exhaust.

Possible Cause:

Exhaust filter is not properly seated with O-ring (Ref.121) or filter material is cracked.

Remedy:

Check condition and check for proper seating ofexhaust filters. Replace if necessary. Also, check filterspring clips for tightness.

Possible Cause:

Exhaust filter is clogged with foreign particles.

Remedy:

Replace exhaust filter.

Possible Cause:

The oil return valve (Ref. 275) is stuck open on RA/RBpumps. Proper function is that when blowing into checkvalve, it should close. When applying vacuum on it,check valve should open.

Remedy:

Free or replace the oil return check valve.

Possible Cause:

If RA/RB Series vacuum pumps run continuously over8 hours without ever being shut down, it may be possi-ble that oil accumulates behind the exhaust box coverto the extent that oil is blown out of the exhaust with theexhaust gas.

Remedy:

Shut pump down during break periods or install an addi-tional oil return line assembly. Check that oil returnvalve (Ref. 275) is free and drains oil back into thepump when the RA/RB Series pump is stopped.

Possible Cause:

Oil return line (Ref. 290) on RC Standard pump isclogged.

Remedy:

Free clogged line or replace. Check that oil is beingdrawn out of the exhaust filter area while the vacuumpump is operating.

Note: An oil filling plug with pressure gauge is provid-ed on all R 5 Series pumps, so that the pressure in frontof the exhaust filters can be monitored. The green fieldindicates that the filters are still effective. Back pres-sure that causes a continuous reading in the red fieldrequires immediate change of exhaust filters (Ref. 120).

4.5 Trouble

Pump runs very noisily.

WARNING: Do not apply pressure or vacu-um by mouth.

11

Possible Cause:

Coupling insert worn.

Remedy:

Replace coupling insert in motor/pump coupling.

Possible Cause:

Bearing noise.

Remedy:

Follow disassembly and assembly steps outlined in theMaintenance and Repair Manual and replace bearings.

Possible Cause:

Vanes stuck.

Remedy:

Follow disassembly and assembly instructions outlinedin the Maintenance and Repair Manual and replacevanes. Use recommended Busch oil. Change oil morefrequently.

4.6 Trouble

The pump runs very hot. See Technical Datafor typical oil sump temperature.

Note: The oil temperature with a closed inlet should beapproximately 185-225°F depending on pump type. At24 in. Hg, the oil in the pump can go above 225°F.These values are taken at an ambient temperature of68°F. The maximum recommended ambient operatingtemperature for an R 5 is 100°F on a continuous basis.When it is necessary to operate a pump in ambient tem-peratures above this limit, careful oil monitoring and/oroptional water cooling is necessary. Contact the facto-ry for details.

Possible Cause:

Not enough air ventilation to the pump.

Remedy:

Clean motor and pump air grills. Do not install thepump in an enclosed cabinet unless a sufficient amountof cool air is supplied to the pump. On pumps with oilcooling coils, clean outside fin assembly. Bring ambientair temperature down.

Possible Cause:

Automotive-type oil filter (if applicable) clogged andpump does not receive enough oil.

Remedy:

Change automotive oil filter.

Possible Cause:

Not enough oil in oil reservoir, or badly burned oil isused for pump lubrication.

Remedy:

Drain and refill only with Busch recommended oil.Increase oil change intervals.

Note: On some high temperature applications, it maybe necessary to change to a high temperature oil suchas R590 or R570. Contact the factory for recommen-dations.

4.7 Trouble

Pump is seized.

Possible Cause:

Pump operated without oil and vanes are broken.

Remedy:

Disassemble and exchange vanes as outlined in theMaintenance and Repair Manual.

Possible Cause:

Pump was operated for an extended period of time inthe wrong rotation.

Remedy:

Inspect vanes and replace.

Possible Cause:

Liquid carryover into the pump cylinder broke vaneswhile pump was running, or oil broke vanes on start-up.

Remedy:

(a) Install condensate trap on the inlet of the pump.

(b) Pump was overfilled with oil in oil reservoir.Follow oil filling procedure (see Section 1.5) and do notoverfill.

(c) Built-in, anti-suck-back valve (Ref. 250 through255) leaking while pump was shut down and vacuumwas left in manifold. Clean valve seat and check thatanti-suck-back valve holds vacuum on inlet when pumpis shut down.

12

(d) Two pumps or a receiver is on the same mainline. Install a manual or automatic operated valve infront of each pump.

4.8 Trouble

Automotive-type oil filter (Ref. 100) does notget warm within two to five minutes whencold pump is started (not applicable on0010, 0012, 0016 or 0021).

Possible Cause:

Automotive-type oil filter is clogged.

Remedy:

Replace automotive-type filter per Section 3.2 andexchange oil per Section 1.5.

Possible Cause:

Wrong automotive-type filter is used and/or oil lines andoil coolers leading to pump are clogged.

Remedy:

Use only automotive filter as listed in Section 3.2 andblow lines free. Flush oil cooler.

Possible Cause:

Electric motor has failed and seized.

Remedy:

Check and replace motor bearings or replace motor ifwindings have burned up.

5.0 LIMITED STANDARD WARRANTY

Busch, Inc. warrants that all products furnished by it arefree from defects in material and workmanship at thetime of shipment for a period of 18 months from thedate of shipment, or 12 months from the date of instal-lation, whichever occurs first. Claims must be madeduring that period and are limited to the replacement orrepair of parts claimed to be defective.

In the case of components purchased by Busch, Inc.,such as starters, controls, mechanical seals, motors,couplings, etc., the warranty of that manufacturer will beextended to the purchaser in lieu of any warranty byBusch, Inc. The replacement of wear items including,but not limited to, seals, bearings, couplings, exhaustcover gaskets, oil drain plugs, oil fill plugs etc., made inconnection with normal service are not covered by thisWarranty.

The Limited Standard Warranty is valid only when the

product has been properly installed, used in a normalmanner, and serviced according to the operating man-ual. This warranty shall not extend to products thathave been misused, neglected, altered, or repairedwithout factory authorization during the warranty period.We highly recommend the use of Busch oils and partsto achieve documented performance and efficient oper-ation. The use of oils or parts other than Busch couldlimit the life expectancy of the equipment and could voidany warranties if they are the cause of any damage.Operating conditions beyond our control such asimproper voltage or water pressure, excessive ambienttemperatures, or other conditions that would affect theperformance or life of the product will also cause thewarranty to become void.

Permission to return parts for warranty repair must beobtained, and all returns must be prepaid to the factory.If, after examination, the product or part is found to bedefective, it will be repaired or replaced on a no-chargebasis and returned, FOB the factory. If it is determinedthat the Warranty has not been breached by Busch,Inc., then the usual charges for repair or replacementwill be made, FOB the factory. Parts or products thatare obsolete or those made to special order are notreturnable.

This Limited Standard Warranty applies only to theabove and is for the period set forth. Busch, Inc.'s max-imum liability shall not, in any case, exceed the contractprice for the product, part, or component claimed to bedefective; and Busch, Inc. assumes no liability for anyspecial, indirect, or consequential damages arisingfrom defective equipment.

THERE ARE NO WARRANTIES IMPLIED OREXPRESSED THAT EXTEND BEYOND THOSECONTAINED IN THIS LIMITED STANDARDWARRANTY.

Note: For extended warranties on your new equipmentcontact Busch, Inc. Headquarters at 1-800-USA-PUMP.

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14

Parts List for R 5 0010/0016

Ref Description

001 Cylinder015 Rotor018 Bearing sleeve022 Vane025 Motor side endplate026 Opp. M.S. endplate030 Needle bearing035 Shaft seal046 Socket set screw047 Lockwasher050 O-ring053 Hex head cap screw054 Lockwasher056 Hex head cap nut060 Tapered pin065 Shaft key075 Exhaust box083 Oil sight glass084 Ring gasket088 Oil fill plug089 Ring gasket090 Pressure gauge095 Oil drain plug096 O-ring120 Exhaust filter121 O-ring125 Filter spring assembly126 Slot chase head mach. screw130 Baffle strainer145 Cover plate exhaust screen146 Hex head cap screw159 Exhaust valve166 Cylindrical pin180 Plug185 Cylinder/exhaust box gasket186 Hex head cap screw187 Lockwasher200 Drum exhaust box plug201 O-ring220 Hydraulic elbow fitting230 Oil tubing231 Oil tubing251 Valve plate252 Valve guide253 O-ring254 Inlet check valve spring256 Cylinder/inlet flange gasket260 Inlet flange261 Inlet screen262 Retaining spring265 Hex head cap screw266 Lockwasher270 Plug271 Ring gasket275 Oil return valve276 Ring gasket

Ref Description

285 Oil recirc. screw286 Banjo hydraulic fitting288 Ring gasket290 Oil return line291 Hydraulic straight fitting300 Motor mounting bracket301 Socket head cap screw302 Lockwasher310 Coupling400 Motor401 Hex head cap screw402 Lockwasher417 Slotted set screw418 Slotted set screw419 Washer421 Rubber foot430 Nameplate431 Directional arrow433 Oil level label436 Maintenance label440 Check valve for gas ballast550 Cover guard

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Ref Description

001 Cylinder014 Seal015 Rotor018 Bearing sleeve022 Vane025 Motor side endplate026 Opp. M.S. endplate030 Teflon sleeve bearing035 Shaft seal050 O-ring052 Lockwasher053 Hex head cap screw054 Lock washer060 Tapered pin065 Shaft key075 Exhaust box079 Demister pad080 Oil sight glass081 Ring gasket083 Oil sight glass084 Ring gasket088 Oil fill plug w/hole089 Ring gasket090 Pressure gauge095 Oil drain plug096 O-ring120 Exhaust filter121 O-ring125 Filter spring assembly126 Slot chs. head mach.screw146 Hex head cap screw153 Exhaust cover plate154 Exhaust cover gasket159 Exhaust valve assembly180 Plug185 Gasket189 Stud190 Lockwasher191 Hex head nut200 Drum exhaust box plug201 O-ring220 Hydraulic elbow fitting222 Hydraulic straight fitting223 Hydraulic straight fitting224 Hydraulic elbow fitting231 Oil tubing240 Cooling coil251 Valve plate252 Valve guide253 O-ring254 Inlet check valve spring255 O-ring260 Inlet flange261 Inlet screen262 Retaining spring263 Baffle strainer

Ref Description

265 Screw266 Lockwasher270 Plug275 Oil return valve276 Ring gasket285 Oil recirc. screw286 Banjo hydraulic fitting289 Fitting nut290 Oil return line tubing291 Hydraulic fitting297 Screen300 Motor mounting bracket301 Socket head cap screw302 Lockwasher311 Motor side coupling half312 Coupling insert313 Pump side coupling half321 Pump fan323 Tolerance ring331 Set screw333 Set screw339 Fan centering ring340 Pump end cover341 Machine screw400 Motor401 Hex head cap screw402 Lockwasher416 Stud417 Slotted set screw419 Foot spacer421 Rubber foot422 Rubber foot429 Screw430 Nameplate431 Directional arrow

Parts List for R 5 0012/0021

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Parts List for R 5 0160

Ref Description

001 Cylinder004 Stud009 Stud015 Rotor018 Bearing sleeve022 Vane025 Motor side endplate026 Opp. M.S. endplate030 Needle bearing031 Endplate spacer032 Pump spacer034 Slotted chs hd cap screw035 Shaft seal040 Protective screen042 Shaft seal retaining plate043 Hex head cap screw046 Hex head plug047 Copper ring gasket050 O-ring053 Hex head cap screw054 Lockwasher056 Hex head cap nut060 Tapered pin065 Shaft key066 Shaft key075 Exhaust box078 Sheet metal baffle079 Demister pad083 Oil sight glass084 Ring gasket088 Oil fill plug089 Oil fill plug gasket090 Pressure gauge095 Oil drain plug096 O-ring099 Nipple100 Auto-type oil filter115 Filter bracket120 Exhaust filter121 O-ring125 Filter spring assembly126 Socket head cap screw130 Baffle strainer136 Support for syn. frame140 Exhaust cover plate141 Cover plate gasket142 Hex head cap screw143 Lockwasher146 Hex head cap screw152 Lockwasher153 Exhaust silencer154 Gasket159 Exhaust valve168 O-ring169 Exh. valve cover plate175 Stud

Ref Description

322 Motor side fan340 Fan Cover341 Sheet metal screw342 Plastic insert390 Eyebolt adapter391 Eyebolt392 Lockwasher393 Hex head cap screw400 Motor401 Hex head cap screw402 Lockwasher416 Stud417 Slotted set screw419 Foot spacer420 Flat washer421 Rubber foot423 Washer424 Hex head cap nut430 Nameplate431 Arrow label436 Maintenance label470 Hydraulic fitting471 Teflon tubing472 Check valve473 Bell reducer474 Gas ballast filter475 Gas ballast valve bracket476 Elbow fitting477 Pet cock valve 478 Hex head cap screw479 Lockwasher480 Oil tube insert9000 Steel socket plug9001 Hydraulic adapter

Ref Description

176 Lockwasher177 Hex head nut180 Plug185 Gasket186 Hex head cap screw187 Lockwasher189 Stud190 Lockwasher191 Hex head nut200 Drum exhaust box plug201 O-ring205 Cover side plate206 Gasket207 Hex head cap screw208 Lockwasher220 Hydraulic fitting222 Hydraulic fitting223 Hydraulic fitting224 Hydraulic fitting230 Oil tubing231 Oil tubing232 Oil tubing240 Cooling coil250 Inlet flange251 Valve guide252 Valve plate253 O-ring254 Inlet check valve spring255 O-ring260 Inlet flange261 Inlet screen265 Hex head cap screw266 Lockwasher270 Plug R1/8"271 Ring gasket275 Oil return valve276 Ring gasket285 Oil recirc. screw286 Banjo hydraulic fitting290 Oil return line tubing291 Hydraulic fitting292 Carburetor jet300 Motor mounting bracket302 Lockwasher303 Hex shoulder nut304 Socket hd machine screw305 Flat washer306 C-face adapter flange307 Socket head screw311 Motor side coupling half312 Coupling insert313 Pump side coupling half315 Protective screen318 Protective screen319 Spacer321 Pump shaft fan

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20

Parts List for R 5 0400

Ref Description

001 Cylinder004 Stud005 Set screw009 Stud015 Rotor018 Bearing sleeve019 Shaft seal sleeve022 Vane025 Motor side endplate026 Opp. M.S. endplate030 Needle bearing035 Shaft seal040 Protective screen041 Hex head nut042 Shaft seal support ring043 Hex head cap screw046 Hex head plug047 Copper ring gasket050 O-ring053 Hex head cap screw054 Lockwasher056 Hex head cap nut060 Tapered pin065 Shaft key066 Shaft key075 Exhaust box078 Sheet metal baffle079 Demister pad080 Perforated sheet metal083 Oil sight glass084 Ring gasket088 Oil fill plug089 Oil fill plug gasket090 Pressure gauge095 Oil drain plug096 O-ring099 Nipple100 Auto-type oil filter105 Cover plate106 Cover plate gasket107 Socket head cap screw108 Lockwasher115 Filter bracket116 Filter bracket120 Exhaust filter121 O-ring125 Filter spring assembly126 Socket head cap screw130 Baffle strainer136 Perf. sheet metal screen137 Hex head cap screw138 Flat washer139 Lockwasher140 Exhaust cover plate141 Cover plate gasket142 Hex head cap screw

Ref Description

312 Coupling insert313 Pump side coupling half319 Spacer320 Fan and coupling spacer321 Pump shaft fan322 Motor side fan327 Locking disk328 Socket head cap screw329 Lockwasher340 Fan Cover341 Sheet metal screw342 Plastic insert391 Eyebolt400 Motor401 Hex head cap screw402 Lockwasher417 Slotted set screw418 Rubber foot419 Foot spacer420 Stud421 Rubber foot422 Rubber foot423 Lockwasher424 Hex head cap nut430 Nameplate431 Arrow label436 Maintenance label470 Hydraulic banjo fitting471 Teflon tubing472 Check valve473 Bell reducer474 Gas ballast filter475 Gas ballast valve bracket476 Elbow fitting477 Pet cock valve 478 Hex head cap screw479 Lockwasher480 Oil tube insert9000 Steel socket plug9001 Flat washer9002 Entrance elbow connector9003 Fenwal temperature switch9004 Grounding washer9005 Plain washer9006 Socket head cap screw9007 Hex head cap screw

Ref Description

143 Lockwasher146 Hex head cap screw153 Cover plate exhaust screen159 Exhaust valve168 O-ring169 Exh. valve cover plate175 Hex head cap screw176 Lockwasher184 Socket head cap screw185 Cylinder/Exhaust box gasket186 Hex head cap screw187 Lockwasher200 Drum exhaust box plug201 O-ring205 Cover side plate206 Gasket207 Hex head cap screw215 Reducing nipple216 Ring gasket220 Hydraulic fitting222 Hydraulic elbow fitting223 Hydraulic elbow fitting224 Hydraulic banjo fitting225 Hydraulic straight fitting226 Hydraulic banjo fitting230 Oil tubing231 Oil tubing232 Oil tubing233 Oil tubing240 Cooling coil250 Inlet flange251 Valve plate252 Valve inlet guide253 O-ring254 Inlet check valve spring255 O-ring258 Ball, Viton260 Inlet flange261 Inlet screen265 Hex head cap screw266 Lockwasher275 Oil return valve276 Ring gasket285 Oil recirc. screw286 Banjo hydraulic fitting290 Oil return line tubing291 Hydraulic elbow fitting297 Screen298 Slot chs. head screw299 Rivet300 Motor mounting bracket302 Lockwasher303 Hex shoulder nut306 C-face adapter flange307 Socket head screw311 Motor side coupling half

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22

Parts List for R 5 0502/0630

Ref Description

001 Cylinder004 Stud005 Set screw008 Stud009 Stud015 Rotor018 Bearing sleeve019 Shaft seal sleeve022 Vane025 Motor side endplate026 Opp. M.S. endplate030 Needle bearing035 Shaft seal039 Socket head mach. screw040 Protective screen041 Hex head nut042 Shaft seal support ring043 Hex head cap screw046 Hex head plug047 Copper ring gasket050 O-ring053 Hex head cap screw054 Lockwasher056 Hex head cap nut060 Tapered pin065 Shaft key066 Shaft key075 Exhaust box078 Sheet metal baffle079 Demister pad080 Perforated sheet metal083 Oil sight glass084 Ring gasket088 Oil fill plug089 Oil fill plug gasket090 Pressure gauge095 Oil drain plug096 O-ring099 Nipple100 Auto-type oil filter105 Cover plate106 Cover plate gasket107 Socket head cap screw108 Lockwasher115 Filter bracket116 Filter bracket120 Exhaust filter121 O-ring125 Filter spring assembly126 Socket head cap screw130 Baffle strainer136 Perf. sheet metal screen137 Hex head cap screw138 Flat washer139 Lockwasher140 Exhaust cover plate

Ref Description

313 Pump side coupling half319 Spacer320 Fan and coupling spacer321 Pump shaft fan327 Locking disk328 Socket head cap screw329 Lockwasher350 Centering ring351 Centering ring352 Fan guard353 Hex head cap screw354 Hex head nut355 Distance bolt356 Mounting bolt357 Hex nut358 Lockwasher360 Lockwasher391 Eyebolt400 Motor401 Hex head cap screw417 Slotted set screw418 Rubber foot419 Foot spacer420 Stud421 Rubber foot422 Rubber foot423 Lockwasher424 Hex head cap nut430 Nameplate431 Arrow label436 Maintenance label470 Hydraulic banjo fitting471 Teflon tubing472 Check valve473 Bell reducer474 Gas ballast filter475 Gas ballast valve bracket476 Elbow fitting477 Pet cock valve 478 Hex head cap screw479 Lockwasher480 Oil tube insert585 Oil return float valve kit586 Hydraulic fitting591 Hydraulic fitting9000 Steel socket plug9001 Flat washer9002 Entrance elbow connector9003 Fenwal temperature switch9004 Grounding washer9005 Plain washer9006 Socket head cap screw9007 Hex head cap screw

Ref Description

141 Cover plate gasket142 Hex head cap screw143 Lockwasher146 Hex head cap screw153 Cover plate exhaust screen159 Exhaust valve168 O-ring169 Exh. valve cover plate175 Hex head cap screw176 Lockwasher184 Socket head cap screw185 Cylinder/Exhaust box gasket186 Hex head cap screw187 Lockwasher200 Drum exhaust box plug201 O-ring205 Cover side plate206 Gasket207 Hex head cap screw222 Hydraulic elbow fitting223 Hydraulic elbow fitting224 Hydraulic banjo fitting225 Hydraulic straight fitting226 Hydraulic banjo fitting230 Oil tubing231 Oil tubing232 Oil tubing233 Oil tubing236 Hydraulic fitting238 Hex head nut239 Lockwasher241 Oil cooler250 Inlet flange251 Valve plate252 Valve inlet guide253 O-ring254 Inlet check valve spring255 O-ring258 Ball, Viton260 Inlet flange261 Inlet screen265 Hex head cap screw266 Lockwasher285 Oil recirc. screw286 Banjo hydraulic fitting290 Oil return line tubing297 Screen298 Slot chs head screw299 Rivet300 Motor mounting bracket302 Lockwasher303 Hex shoulder nut306 C-face adapter flange307 Socket head screw311 Motor side coupling half312 Coupling insert

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R 5

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Parts List for R 5 1000/1600

Ref Description

001 Cylinder015 Rotor019 Shaft seal sleeve022 Vane025 Motor side endplate026 Opp. M.S. endplate028 End plate spacer030 Needle bearing031 Endplate spacer035 Shaft seal036 Shaft seal037 Retaining ring046 Hex head plug049 O-ring050 O-ring053 Hex head cap screw054 Lockwasher060 Tapered pin061 Cylindrical pin065 Shaft key066 Shaft key068 Connect piece for hyd. fitting069 O-ring070 Gas ballast line, A-side071 Gas ballast line, B-side072 Hydraulic fitting075 Exhaust box078 Sheet metal baffle079 Demister pad080 Perforated sheet metal083 Oil sight glass084 Ring gasket088 Oil fill plug089 Oil fill plug gasket096 O-ring099 Nipple100 Auto-type oil filter105 Cover plate106 Cover plate gasket107 Socket head cap screw108 Lockwasher115 Filter bracket116 Filter bracket117 Filter bracket120 Exhaust filter121 O-ring125 Filter spring assembly126 Socket head cap screw129 Baffle strainer, A side130 Baffle strainer, B side136 Perf. sheet metal screen137 Slot chase head screw138 Flat washer139 Flat washer140 Exhaust cover plate141 Cover plate gasket142 Socket head cap screw143 Lockwasher

Ref Description

299 Sheet metal nut300 Motor mounting adapter301 Socket head cap screw302 Lockwasher311 Motor side coupling half312 Coupling insert313 Pump side coupling half320 Distance spacer321 Cooling fan327 Retaining disk328 Hex head cap screw329 Lockwasher331 Socket set screw333 Socket set screw390 Eyebolt adapter391 Eyebolt392 Lockwasher393 Hex head cap screw394 Alignment pin400 Motor401 Hex head cap screw402 Lockwasher409 Spacer410 Frame411 Washer412 Lockwasher413 Hex head cap screw414 Hex head cap screw421 Rubber foot429 Sheet metal screw430 Nameplate431 Arrow label465 Ring gasket466 Plug467 Bypass plug471 Gas ballast valve assembly483 Ring gasket484 O-ring488 Socket head plug490 Nipple495 O-ring496 Float switch498 Socket head cap screw499 Lockwasher900 Elbow connector901 Temperature switch902 Temperature switch

Ref Description

147 Exhaust cover plate159 Exhaust valve168 O-ring169 Exh. valve cover plate175 Stud176 Lockwasher177 Hex head nut185 Cylinder/exhaust box gasket186 Hex head cap screw187 Lockwasher200 Drum exhaust box plug201 O-ring205 Cover plate206 Cover plate gasket207 Hex head cap screw208 Lockwasher210 Elbow pipe fitting211 Hydraulic straight fitting212 Oil tubing213 Hydraulic elbow fitting214 Reducer bushing225 Hydraulic banjo fitting230 Oil tubing237 Cooler guide238 Socket head cap screw239 Lockwasher241 Oil cooler242 O-ring243 Fan guard244 Cooler front cover245 Flat washer246 Hex head cap screw247 Socket head cap screw248 Lockwasher250 Inlet flange251 Valve plate252 Valve inlet guide253 O-ring254 Inlet check valve spring255 O-ring258 Ball260 Inlet flange261 Inlet screen265 Hex head cap screw266 Lockwasher270 Plug271 Ring gasket273 Distance bolt274 Lockwasher275 Oil return valve276 Ring gasket285 Oil recirc. screw286 Hydraulic banjo fitting290 Oil return tubing291 Elbow assembly kit293 Oil steel tubing297 Screen298 Sheet metal screw

25

Technical Data

Model 0010 0012 0016 0021 0160 0400 0502 0630 1000 1600

Nom. pumping speed (ACFM) 6 7 8.6 14 115 305 375 455 670 1030

Free air displacement (CFM) 7.1 8.5 11.2 15 117 330 413 490 704 1130

Maximum sound level (dBa) 69 68 70 72 79 83 84 85 85 86

3 phase motor data (HP) ** 3/4 3/4 3/4 1 7.5 15 20 25 40 50

1 phase motor data (HP) ** 1 3/4 1 1 1/4 NA NA NA NA NA NA

Approx. oil capacity (qts) 0.5 0.5 0.5 0.5 7 14 16 16 42 44

Inlet connection - NPT (inch) 3/4 1" hose 3/4 3/4 2 3 3 3 6 ANSI 6 ANSI

End vacuum (RC) 15 15 15 15 15 15 15 15 15 15

End vacuum (RA) 0.5 2 *** 0.5 2*** 0.5 0.5 0.5 0.5 0.5 0.5

Approx. weight of pump (lbs) 49 42 60 42 416 1152 1316 1525 2151 2833

Notes:

* Maximum oil temperature with 90°F ambient temperature and no supplemental oil cooling.** Because various motor types might be available and/or used on your specific pump, you should always refer to the motor nameplate to

verify HP, volts, amps, frame size, etc. or consult the factory.*** RB versions for Model 0012 and 0021.

26

Typical Wiring Diagram for 1000 and 1600 Pumps Only

Busch Inc. Factory Service Centers

California Illinois

13826 Struikman Road 430 Windy Point DriveCerritos, CA 90703 Glendale Heights, IL 60139Phone (562) 926-8422 Phone (630) 545-1310Fax (562) 926-7262 Fax (630) 545-1384service.ca@buschinc.com service.il@buschinc.com

New Jersey Puerto Rico

39 Davis Street 420 E Street, Suite 4South Plainfield, NJ 07080 Minillas Industrial ParkPhone (908) 561-3233 Bayamon, PR 00959-1901Fax (908) 561-3909 Phone (787) 798-5045service.nj@buschinc.com Fax (787) 798-5033

service.pr@buschinc.com

Texas Virginia

15411 Vantage Pkwy W., Suite 216 516 Viking DriveHouston, TX 77032 Virginia Beach, VA 23452Phone (281) 449-2381 Phone (757) 463-7800Fax (281) 449-2383 Fax (757) 463-7407service.tx@buschinc.com service.va@buschinc.com

27

P/N 872.001.01Revision 12/05

Busch, Inc.516 Viking DriveVirginia Beach, Virginia 23452Phone: (757) 463-7800FAX: (757) 463-7407