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:
22452005, 21745119
Fixhere
PinPistonbolt
Piston
Endcap
Scotchbrite
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