Toro 08743 - Traction System Problems

TractionSystemProblems
Problem
PossibleCauseCorrectiveAction
Thehydraulicuidisverycold.Allowthehydraulicuidtowarmby
safelyoperatingthemachineatrest.
Thehydraulicuidlevelinthehydraulic
tankislow.
Adjustthehydraulicuidlevel.
Thetractioncontrollinkageis
incorrectlyadjusted,binding,or
damaged.
Inspecttractionlinkageoperationand
serviceoradjustifnecessary.
Thetractionpumpbypassvalveisopen
ordamaged.
Closeorreplacethetractionpump
bypassvalve.
Enginespeedislow.Increasetheenginespeed.
Thechargepressureislow(lift
circuitperformance,andsteering
circuitperformanceformodel07845
machinesisalsoaffected).
Verifychargepressure;refertoT esting
theTractionCircuit–ChargePressure
intheHydraulicSystemchapterofthis
manual.
Thepiston(traction)pumporpump
reliefvalvesarewornordamaged.
Verifytractionpumpoperation;refer
toTestingtheTractionCircuit–Piston
(traction)Pump(P1)FlowandRelief
PressureT estintheHydraulicSystem
chapterofthismanual.
Thewheelmotor(s)iswornor
damaged.
Verifywheelmotoroperation;referto
TestingtheTractionCircuit–Wheel
MotorEfciencyintheHydraulic
Systemchapterofthismanual.
Thetractionresponseissluggish.
Note:Ifatractioncircuitcomponent
hasinternalwearordamage,it
ispossiblethattheothertraction
componentsarealsodamaged.
Themachinetravelstoofarbefore
stoppingwhenthetractionpedalis
released.
Tractionpedallinkageoutof
adjustment,restricted,ordamaged.
Inspecttractionlinkageoperationand
serviceoradjustifnecessary.
Thetractioncontrollinkageis
incorrectlyadjusted,binding,or
damaged.
Inspecttractionlinkageoperationand
serviceoradjustifnecessary.
Thechargepressureislow(lift
circuitperformance,andsteering
circuitperformanceformodel07845
machinesisalsoaffected).
Verifychargepressure;refertoT esting
theTractionCircuit–ChargePressure
intheHydraulicSystemchapterofthis
manual.
Neutralisdifculttondorunit
operatesinonedirectiononly(forward
orreverse).
Thepiston(traction)pumporpump
reliefvalvesarewornordamaged.
Verifytractionpumpoperation;refer
toTestingtheTractionCircuit–Piston
(traction)Pump(P1)FlowandRelief
PressureT estintheHydraulicSystem
chapterofthismanual.
Troubleshooting:TractionSystemProblems
Page3–6
SandPro
®
3040and5040
20251SLRevA