caterpillar-卡特彼勒5tech tips for hex320C液压油缸活塞密封漏油检查

5TechTipsFor一.Check320Chydrauliccylinderatpistonsealleakage320C油缸活塞密封漏油的检查CheckboomcylinderforpistonsealPositionthesticksothatitisapproximayperpendiculartogroundwiththebucketflatonStoptheengineandreleasethepressureinthehydraulic停止发,释放系统的压力Placeablockerplate(orplug)betweenoneoftheboomcylinderrodendlinesandtherodendportonthecylinder.BlockerBlockerOpenBlockerOpenDisconnecttherodendlinefromtheotherboomBlockthesecondlineandleavetherodendcylinderportThisshouldresultinablockerplatebeingbetweenoneboomcylinderrodendportandtherodendlineandtherodendportoftheotherboomcylinderbeingopenwiththerodendlinedisconnectedandblocked.Starttheengineandcarefullymovethebucketpilotcontrollevertowardthebucketdirectionuntilthefrontofthemachineis Observetheboomcylinderrods.Iftheybegintoextend,thecylinderwiththeblockerplatebetweentherodendlineandthecylinderporthasaninternalleak.ChangetheblockerplatetotheotherboomcylinderandcheckitinthesameTheboomcylinderrodshouldnotmoveoutofthecylinderataratethatwouldexceedtheservicelimitof60mmin3minutes.BoomUPdriftisgreaterthanservicelimitof60mmin3minutes.Checkboomcylinderpistonsealsfordamageandcylinderboresforscoring,scuffing,orbeingout-of-round.Replacethepistonsealsifonlythesealsshowdamage.Ifthecylinderboreisscuffed,scored,orout-of-round,itmaybepossibletosalvagethecylinderbyhoningthebore.Theborecanbeenlarged.254mmfromitsnominaldiameterwithoutaffectingthepistonorcylinderheadseals.Replacethecylinderassemblyifitcannotberepaired.360毫米.检查大臂油缸活塞密封是否损坏,及油缸孔是否划缸孔来修复此油缸.油缸正常直径增大0.254毫米并不会影响活塞或油缸头密封的性能.如果油CheckthestickcylinderforleakageatthepistonFillthebucketwithsoil,extendstick(stickOUT),andlowerbuckettotheStoptheengineandreleasethepressureinthehydraulic停止发,释放系统的压力InstallblockerplatebetweenthestickcylinderrodendlineandthestickBlockerBlockerStartengineandincreasethehydraulicoiltemperaturetothenormaloperating启动 RaisetheboomuntilthebucketisslightlyaboveReturntheboompilotcontrollevertotheNEUTRALpositionandmeasurestickcylinderfrompintopin.Raisetheboomuntilthebucketisapproximay1maboveReturntheboompilotcontrollevertotheNEUTRALposition.After3minutesmeasurethecylinderlengthfrompinfordrift.Stickcylinderdriftshouldbewithin12.0mmforanewcylinderin3二320Chydraulicoiltemperaturetoo320C油温过高Highhydraulictemperaturecausesawarningcategory2toexist,whenitisencountered,thehydraulicoiltemperatureindicatorwillbeactivatedandtheactionalarmlampwillflash.At95℃thetemperaturegaugeonthemonitorpanelwillbeentertheredrange,thealarmlampwillcomeonsimultanenouslywith“HighHylTemp”displayedonthescreen,activecodewillbeexistedwith69:600-04ifitiscurrentlyoverheating.Thefollowingtestwilldetermineacausefortheerrorcode.油温过高,警告等级2出现.当油温过高,油温指示启动,且警告灯闪烁.当温度达95oC,显示板上的温度表会进入红域,同时警告灯亮且屏幕显示“高油温”,如果当前过热,69:600-04出现.以下的测试将决定故障代码的原因.CategoryCategoryCategoryPerformhydraulicoiltemperaturesensorwhichindicatestemperaturetoohigh.Thistestdeterminewhetherthecausefortheerrorcodeisanactualhydraulicoverheatingproblemormalfunctionofhydraulictemperaturesensorcircuit.Wecancheckhydraulicoiltemperatureaftermachinehaveopenedsomeperiodoftimeandbeforethesystemcooldown,usethedisplayofthermometergroup.表示温度过高的油温感应塞测试.通过测试可得知故障代码的原因真的是油温过高还只是温度感应塞故障.我们可以在机器运行一段时间后,系统冷却前用温度计来测量液Performradiatorairflowtest.Restrictiontoairflowthroughtheoilcoolercanleadtohydraulicsystemoverheat.Sowemustcheckoilcoolerfordamageorplugging,checkfanspeedtomakecertainitisrunningatproperspeedandfanbelttension.Checkmachineoperation.Instructionoperationinproperoperationofmachine.Don’tletmachineisbeingoperatedatsystemreliefpressuretoooftenoroverloaded.Checkhydraulicoilfilterforrestriction,changethehydraulicoilretunefilterifPerformmainreliefvalvetest&adjusting,ifthepressureistoolowalackofpowercomplaintandpossiblehydraulicsystemoverloadingcouldresult.Theoverheatingmaybecausedbyacombinationofinternleaksfrommaincontrolvalve,pumps,actuatorsandpertainingtohigherSMU.三320CStickdriftoutDriftofthestickoutcanbecausedbyleakagepastthemaincontrolvalvespeed,leakageatpistonsealorstickcylinderheadendlinereliefvalve.Thetestdeterminethecauseforstickdriftoutexceedingservicelimiter.Testprocedure600600FFFullyextendstickcylinderthenetractstickcylinder70mmFullyextendbucketcylinder(bucketincurledposition),RefertoillustrationFullyextendstickcylinderthenretractstickcylinderAdjustboomsothatbucketlinkageisapproximay600mmaboveMeasurestickdriftin3 umdriftis24.0NoteMachinetobeonflatlevelgroundBuckettobeemptyOiltemperature50-55ºC50-PossibleCausesStickcylinderdriftshouldbewithin24.0mm/3①.Performsticklinereliefvalvetest&adjust.Repairif②.Performresiduepilotsupplypressuretestforstickcontrolvalve.AfterworkingandpilotcontrolleverinNeutral,comparethepressuresateachendofthestickcontrolvalve③.Performthestickcylinderforleakageatpistonseals.Checkthestickcylinderforleakageatthepistonseals.④.Performcontrolvalveleakagetest.ThetestmustbeperformedintheAftercompletingallabovecheck,ifstickdriftoutstillexceedslimit.Theexcessivedriftmaybecausedacombinationofleakfromthetestsjustrun,determinewhichcomponentcontrolthemosttostickdriftout.Makerepairtobringdriftwithinacceptablelimits.四320CTrackIsolatedPumpStallTestsThisprocedureshouldbeusedasastartingpointdiagnostictodeterminewhetherapumpflowneeded,thisistosay,wetheremaybeaproblemonthehydraulichorsepowerofthepumpscorrectlymatchingtheavailableenginehorsepowerofthemachine此测试是决定是否需泵流量测试的起始步骤,也就是说怀疑泵的马力与可获得的机器发的马力不匹配BeforeperformingthistestexecutethefollowingRaiseOilTemperaturetoAllowtheenginepumpcontroltoadjustPowerShiftSafelyblocktheleftandrighttracksofthemachinewiththespecialAccesstheMainscreeninMonitoringSystem,selecttheServiceOptionsfunctionandenterthedealerpassword0001,thenselecttheMachineInfoScreenandletengineSpeedDialtosetting10进入控制系统的主菜单屏幕,选择维修选项栏,输入商0001,选择机器信息屏幕,使发速Safelystallthelefttrackofthemachine.(Thisstallstheleftpump.Seeillustration(1)sprocket链轮(2)FT-2547trackblockFT-2547堵UsingtheMachineInformationscreenrecordthefollowing 转ENG 转IMPLPUMP(I)PRESS(LeftPumpDeliveryIMPLPUMPPWRSHIFTPRESS(PowerShiftPWRPWRSHIFTReturntheLeftTravelPedal/JoysticktotheNeutralSafelystalltherighttrackofthemachine.(ThisstallstherightUsingtheMachineInformationscreenrecordthefollowingENGIMPLPUMP(D)PRESS(RightPumpDeliveryIMPLPUMPPWRSHIFTPRESS(PowerShiftReturntheRightTravelPedal/JoysticktotheNeutral Ifbothsingletrackstallsshowallofthefollowing:如果俩侧测试的数据显示如下 70psi<PowerShiftPressure200psiRPM=FullLoadPumpoutputpressure=MainReliefTHEN:Thehydraulichorsepowerofthepumpscorrectlymatchtheavailableenginehorsepowerofthemachine.IfeithersingletrackstallshowsallofthePowerShiftPressure>200psi@FullLoadSpeedandPumpOutputPressure=MainReliefSetting.And:theothersingletrackstall70psi<PowerShiftPressure<200psi@FullLoadSpeedandPumpOutputPressure=MainReliefSetting.THEN:Therightandleftpumpsarenotcorrectlybalancedwithoneanother.ThepumpwiththehigherPowerShiftPressureValueissettoohigh.ThepumpsshouldbeflowtestedtosettheoutputflowtoIfbothsingletrackstallsshowallofthefollowing如果俩侧测试的数据显示如下PowerShiftPressure>200psi@FullLoadSpeedandPumpOutputPressure=MainReliefTHEN:Thehydraulichorsepowerofthepumpsdonotmatchtheavailableenginehorsepowerofthemachine.Thepumpsareeithersettoohighortheengineisnotproducingthecorrecthorsepower.Thepumpsshouldbeflowtest