vacuum pump testing 1980s mercedes diesel

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  • 7/27/2019 VACUUM PUMP TESTING 1980s Mercedes Diesel

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    ALLDATAdiy.com 1983Mercedes ew240D (123.123)L4-2.4L SL (616.912)PistonT... PageALLHStfiCTI&accrrr WelcomeRICHARD

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    YourVehicle: 983Mercedes enz240D 123.1231L4-2.4LSL 6f6.9{2)

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    Vehicle> Enqine.Goolinsand Exhaust> Enoine Dkgg{{!fg!!!B > Serviceand Repair> Piston Tvpe NotesPistonType

    TESTING1 Using abricated dapter,Fig. , connect uitable acuumgauge ovacuumine between rakebooster nd check alve.2. Startengineand run at 750RPMandnote engthof timerequiredo obtain14.8 nchesHgv6cuum.3. On models quippedwith inchdoublediaphragm rakebooster, lapsedimeshouldmeasure 3-14 ecandswith brakeunitandavacuumaccessorisentedand 9-11secondswithbrakeunitonlyvented.On models quippedwith1Onchsinglediaphragrnrakebooster, lapsed imeshouldmeasure12-13 econdswithbrakeunitandall vacuum ccessbriesentedand7-d secondsith brateunitonlyvented.4, lf elapsedime s notwithinspecificationsr if vacuum ropsmore han5.9 nchesHg n30 seconds, heckvacuum ystem or eaklf no eaksare ound, epairor replace acuumpumpas necessary.

    REMOVALDisconnec{acuumine romvacuumpump.Remove acuumpumpattaching olts, hen hevacuumpumpandgasket,Fig-3, fromcrankcase.

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    Fig. I Fabricated acuumpump estingadapter

    http://www.alldatadiy.com/alldata/AFl-V25806503-C46832-R0-OD-N/01417459521566208771131

  • 7/27/2019 VACUUM PUMP TESTING 1980s Mercedes Diesel

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    i lCRERS0[iPHsstgilFnlil6

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    Fig. 3 Piston ype vacuumpump

    ALLDATAdiy.com 1983Mercedes enz240D 123.123)L4-2.4LSL (616.912)PistonT... Page o

    DISASSEMBLYSecure acuumpump n holding ixtureNo. 115589142100r equivalent, ith ixture pindle ompletely acked ut.Castingseamon vacuumpump must be centeredbetween he two fonrard acrewsof holding fixture.Movepiglg rodandpistono TDCposition y turningholdingixture pindleup o stop.Remove umpcoverattachingcrewsand he cover.Remove umpcovergasket,hen hegaskets ndplatevalves romhousing.Removeocknut ndwasher romoiston od.Fullybackout holdingixture pindle,hen remove iston romhousing singsuitable liers.Remove istondisc rompumphousing,hen hepiston inqand O-ringrompiston.f piston linershows signs of wear, hevacuumpump must be replaced.Removeockerarm shaftplug romhousing.

    ,61 rr

    0lt"Fig.4 Fabricatedpiston rod tool. Plston ype vacuumpump

    9. Screw abricatedool,Fig.4, intopigton od.Tum downnul to compress pring, hen emove ump romholdingixture.10. Remove haft, hen hepiston od,springassembly ockerarmand abricatedool rompumphousing.http:l/www.alldatadiy.comlalldatalAFl-V25806503-C46832-R0-OD-N/01417459521566208771l3l2

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    ALLDATAdiy.com 1983Mercedes enz24AD023.123)L4-2.4LDSL(616.912)PistonT... Page11. Back ooloul of piston od, hen emove pring etainer nd springs. he rockerarm and pistonmust be serviced as an assembonly.

    ASSEMBLY1 Positionpringetainerandprings npistonod.Compress ssembly ith abricatedool,Fig.4, hen nstallntopumphousing.2. Install ockerarmshaft ntopumphousing.3. 4pplysuitableocking ompoundo rockerarm shaftplug, hen nstallplugwithnewsealand orque o 6-7 t. bs.4. Securepump o holdingixtureand urnholdingixture pindleup ostop, hen emoveabricated'tool.5- Thoroughlylean iston,hen ubricatend nstall ewO-ring ndpistoning.6. Pushpiston odup o stopusinghotdingixture pindle.Ensurepiston od l-nge iscenterednupper pring etainer.7. Position iglondiscon piston od, hen ighily ubricate istoniner.8. lnstallEg!q, usingcare o avoiddamaging iston ing.9. lnstallwasherand ocknut n piston od.Backout spindle nd bottom istonout againsthousing,hen orque ocknuto 7 ft. lbs.10. Install late alves ndnewgasketsntopumphousing.11. Install umpcoverand orqueattaching crewso 2 ft. lbs.12. Remove acuumpump rom holdingixture.

    INSTALLATIONlnstall acuumpump o crankcase singa newgasket,hen ightenattaching oltssecurely.Connect acuumine opump.1.2.

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