VolvoPentasteeringcylinderrepairsetfor2cylinders.

Thissteeringcylinderisatleastmountedonthefolowingdrives: DPH-A,DPH-B,DPH-C,DPR-A,DPR-B,DPR-CVolvoPentaOEMnr.:

Circlip

Contentsrepairset:1)2Pistonoilscraperings2)2PistonO-rings 2)O-ring(33)2PistonrodO-rings4)2Pistonrodoilscraperings5)2O-rings(endcap) 1)Pistonoilscrapering 4)Pistonrodoilscrapering 5)O-ring 1)Doubleactionpolywiper6)2Doubleactionpolywipers

İnsctructions

1) Demounting

a) Firstremovethebellowfromthepistonrod.İfthebellowisgluedand/orfixedwithatie-wrapfirstcarefullycutthebellowlosefromthecylinderwithoutharmingthecylinder.İfthebellow(s)cannotbeusedagainyourVolvoPentasuppliercandelivernewbelows.Thereare2modelsavailable.SeepictureA.

b) Thenplacethecylinderinavice(ifavailable)andremovethecirclip.Thiscanbeaquitdelicatejobbecausethecirclipismostofthetimestuckcausedbydirt.ForcleaningtheareaaroundthecirclipyoucanusebrakecleanerorWD-40.Useasmallandthinscrewdrivertogetunderthecirclipandliftittoremovethecirclip.İtcantakesometimetogetitremoved.Tip:Toloosenthecirclipplaceascrewdrivertotheouterendofthecirclipandhitsoftlythescrewdriverwithahammertillthecirclipstartturningsoitwillbeeasiertoremove.

c) Thenthepistonrodshouldbepulledoutofthecylinder.Firsttrytopullthepistonrodoutofthecylinderbyhand.İfthisdoesn'tworkplacetheupperendofthecylinderinavicewiththepistonrodfaceddown.Makesurethatyouplacetheviceattheendandnotsqueezeandharmthecylinder.SeepictureB.Putapinintheendofthepistonrodandhitcarefullyonthepintogetthepistonrodremoved.Anotheroptionistofixthepistonrodinaviceandtrytogetthecylinderremovedbypullingitupanddownbyhand.Mostofthetimethiswillworkifthepistonisnottomuchstuckinthecylinder.

d) Removetheboltwhichfixesthepiston.SeepictureC.

e) Whenthepistonisremovedslidetheendcapofthepistonrod.

f) RemovetheO-ringandpistonoilscraperingfromthepiston.RemovetheO-ringontheouthersideoftheendcap.RemovetheO-ringandoilscraperingfromtheinnersideoftheendcap.Removethepolywiperfromtheendcap.

g) Cleantheendcap,pistonandpistonrodandthecylinderthoroughlywithscotchbriteSeepictureC.DoNOTusesandpaper.Anypartofdirtorsandwillcauseleackageofthecylinder.

2) Mounting

a) MountthecorrectO-ringontheouthersideofthepiston.Thencarefullyslidetheoilscraperingoverthepistonandpushitintoposition.DoNOTusesharptoolswhichmightharmtheoilscrapering.

b) MounttheO-ringontheouthersideoftheendcap.MountthecorrectO-ringontheinnersideoftheendcapandafterthattheoilscrapering.Togettheoilscraperingintoplaceyoucanuseastumptooltobesuretheoilscraperingwillnotbeharmed.Anyoverstretchingordamagewillmaketheoilscraperingworthless.

c) Mountthedoubleactionpolywiperintheendcap.Tip:TogettheO-rings,oilscraperingsandpolywiperintoplaceyoucanusesomeATF-oiltomakethejobeasier.

d) PutsomeATF-oilonthepistonrodandslidetheendcaponthepistonrod.

e) Mountthepistononthepistonrodwiththebolt.Fixtheboltwith(Loctite)threadlockerwhichissuitableforhydraulicapplications.

f) PutsomeATF-oilinthecylinder,onthepistonandendcapendslidethepistonrodintothecylinder.Afterthatmountthecirclip.

3) Testing

a) Youcantesttherebuildcylinderbyclosingthethreadedoilconnectionswithaplascticboltandtrytomovethepistonrod.İftheplasticboltsdonotleakairitmustbeveryhardtomovethepistonrod.

b) İfthecylinderistestedyoucanmountthebellow(s).Becausemostoftheharmonthesesteeringcylindersiscausedbygrowthonthepistonrodwhichharmsthepolywipersealandthecylinderstartsleaking.İadvisetofixthebellow(s)withatiewrapand2-componentepoxygluetobesurethebellowstaysinplace.

c) WhenyoumountthehydrauliclinesfromthesteeringpumpbackonthecylinderİadvisetouseLoctite542threadlockerforhydraulicapplications.DoNOTuseteflon.

Anyquestionspleasedonothesitatetocontactme!

PictureA: PictureB: PictureC:

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Fixhere

PinPistonbolt

Piston

Endcap

Scotchbrite