Service Manual

GeneralHydraulicSystemProblems(GreensPro
1260)
Problem
PossibleCauseCorrectiveAction
Thetting(s),hose(s),ortube(s)are
looseordamaged.
Secureorreplacelooseordamaged
hydraulicconnections.
Hydraulicuidisleakingfromthe
system.
TheO-ring(s)orseal(s)aremissingor
damaged.
InstallanewO-ring(s)orseal(s).
Thehydraulicuidlevelinthehydraulic
tankislow.
Adjustthehydraulicuidlevel.
Thehydraulicsystemhasawrongtype
ofuid.
Replacethehydraulicuid.
Note:Refertothetractionunit
Operator’sManualforhydraulicuid
specications.
Theincompatiblehydraulicuidsare
mixedinthesystem.
Replacethehydraulicuid.
Thereiswaterinthehydraulicsystem.
Replacethehydraulicuid.
Thehydraulicuidfoamsexcessively
causinguidleakagefromthehydraulic
tankbreather.
Thepumpsuctionlinehasanairleak.Replacethepumpsuctionline.
Thehydraulicuidlevelinthehydraulic
tankislow.
Adjustthehydraulicuidlevel.
Thesuctionlterorsuctionlineis
damaged,loose,orclogged.
Secure,cleanorreplacethesuction
lterorsuctionline.
Thehydraulicuidiscontaminatedor
theuidviscosityistoolight.
Replacethehydraulicuid.
Note:Refertothetractionunit
Operator’sManualforhydraulicuid
specications.
TheengineRPMistoolow.
VerifyengineRPMandadjustif
necessary.
Thetractionpumptow(bypass)valve
isopenordamaged.
Closeorreplacethetractionpump
bypassvalve.
Thechargepressureislow.
Verifychargepressure;referto
HydraulicPumpChargePressureT est
inChapter5–HydraulicSystem.
Thehydraulicpumpiswornor
damaged.
Verifyhydraulicpumpoperation;refer
toHydraulicPumpFlowandRelief
PressureT estinChapter5–Hydraulic
System.
Thehydraulicdrivemotoriswornor
damaged.
Repairorreplacethehydraulicdrive
motor.
Thehydraulicsystemoperateshot
(exceeds95°C(203°F).
Note:Ifatractioncircuitcomponent
hasinternalwearordamage,it
ispossiblethattheothertraction
componentsarealsodamaged.
GreensPro
™
1240/1260
Page3–5
Troubleshooting:GeneralHydraulicSystem
Problems(GreensPro1260)
14211SLRevA