Service Manual

Table Of Contents
TractionCircuitProblems(GreensPro1260)
(continued)
Problem
PossibleCauseCorrectiveAction
Thehydraulicuidlevelinthehydraulic
tankislow.
Adjustthehydraulicuidlevel.
Thehydraulicpumptow(bypass)valve
isopenordamaged.
Closeorreplacethehydraulicpump
bypassvalve.
Thechargepressureislow.
Verifychargepressure;referto
HydraulicPumpChargePressureT est
inChapter5HydraulicSystem.
Themotioncontrollinkageisincorrectly
adjusted,disconnected,binding,or
damaged.
Verifymotioncontroloperationand
repairoradjustasnecessary;refer
toAdjustingtheControlPedalReturn
toNeutralMechanisminChapter5
HydraulicSystem.
Thehydraulicpumpreliefvalvesare
leakingordamaged.
Verifyhydraulicpumpreliefvalve
operation;refertoHydraulicPump
FlowandReliefPressureTestin
Chapter5HydraulicSystem.
Thehydraulicpumpiswornor
damaged.
Verifyhydraulicpumpoperation;refer
toHydraulicPumpFlowandRelief
PressureT estinChapter5Hydraulic
System.
Thehydraulicdrivemotoriswornor
damaged.
Repairorreplacethehydraulicdrive
motor.
Notractionexistsineitherdirection.
Note:Ifatractioncircuitcomponent
hasinternalwearordamage,it
ispossiblethattheothertraction
componentsarealsodamaged.
Thechargepressureislow.
Verifychargepressure;referto
HydraulicPumpChargePressureT est
inChapter5HydraulicSystem.
Thehydraulicpumpreliefvalvesare
leakingordamaged.
Verifyhydraulicpumpreliefvalve
operation;refertoHydraulicPump
FlowandReliefPressureTestin
Chapter5HydraulicSystem.
Thehydraulicpumpiswornor
damaged.
Verifyhydraulicpumpoperation;refer
toHydraulicPumpFlowandRelief
PressureT estinChapter5Hydraulic
System.
Thehydraulicdrivemotoriswornor
damaged.
Repairorreplacethehydraulicdrive
motor.
Thehydraulicmotordoesnotholdload
intheNEUTRALposition.
Note:Ifatractioncircuitcomponent
hasinternalwearordamage,it
ispossiblethattheothertraction
componentsarealsodamaged.
GreensPro
1240/1260
Page3–7
Troubleshooting:TractionCircuitProblems
(GreensPro1260)
14211SLRevB