Toro 08743 - Page 39

GeneralHydraulicSystemProblems(continued)
Problem
PossibleCauseCorrectiveAction
Thehydraulicuidlevelinthehydraulic
tankislow.
Adjustthehydraulicuidlevel.
Thehydraulicuidiscontaminatedor
theuidviscosityistoolight.
Replacethehydraulicuid.
Note:Refertothetractionunit
Operator’sManualforhydraulicuid
specications.
Thehydraulicuidcoolerisdamaged
orplugged.
Repairorreplacethehydraulicuid
cooler.
Theuidcoolerairowisobstructed.Verifycoolingfanoperationandremove
debrisfrominandaroundtheuid
cooler.
Thetractionpumpbypassvalveisopen
ordamaged.
Closeorreplacethetractionpump
bypassvalve.
Thechargepressureislow(lift
circuitperformance,andsteering
circuitperformanceformodel07845
machinesisalsoaffected).
Verifychargepressure;refertoT esting
theTractionCircuit–ChargePressure
intheHydraulicSystemchapterofthis
manual.
Thetractionpumpiswornordamaged.
Verifytractionpumpoperation;refer
toTestingtheTractionCircuit–Piston
(traction)Pump(P1)FlowandRelief
PressureT estintheHydraulicSystem
chapterofthismanual.
Thewheelmotor(s)iswornor
damaged.
Verifywheelmotoroperation;referto
TestingtheTractionCircuit–Wheel
MotorEfciencyintheHydraulic
Systemchapterofthismanual.
Note:Ifatractioncircuitcomponent
hasinternalwearordamage,it
ispossiblethattheothertraction
componentsarealsodamaged.
Thehydraulicsystemoperateshot
(exceeds95°C(203°F).
Theshuttlevalveintheleftrearwheel
motorisstuckordamaged.
Remove,clean,andinspecttheshuttle
valvecomponents;refertoWheel
MotorServiceintheHydraulicSystem
chapterofthismanual.
SandPro
®
3040and5040
Page3–5
Troubleshooting:GeneralHydraulicSystemProblems
20251SLRevA