Toro 08743 - Testing the Steering Circuit (Model 08745 Only) - Steering Cylinder Internal Leakage

TestingtheSteeringCircuit(Model08745only)–SteeringCylinder
InternalLeakage
g355311
Figure40
SteeringCircuit(Model08745only)–SteeringCylinderInternalLeakageT est
Unitsteeringperformancewillbeaffectedbyincorrectfronttirepressure,binding
inthehydraulicsteeringcylinder,extraweightonthevehicle,and/orbindingof
thesteeringlinkageorfrontfork.Ensurethattheseconditionsarecheckedand
functioningproperlybeforeproceedingwithanysteeringsystemhydraulictesting.
Note:Thereliefvalveforthesteeringcircuitisintegratedintothesteering
controlvalve.
TestProcedure
1.Ensurethatthehydraulicuidisatnormaloperatingtemperatureby
operatingthemachineforatleast10minutes.
2.Drivethemachineslowlyinagureeightonaatlevelsurface.
A.Thereshouldbenoshakingorvibrationinthesteeringwheelorfront
wheel.
B.Thesteeringwheelmovementsshouldbefollowedimmediatelyby
acorrespondingfrontwheelmovementwithoutthesteeringwheel
continuingtoturn.
3.Stoptheunitwiththeenginerunning.Turnthesteeringwheelwithsmall
quickmovementsinbothdirections.Letgoofthesteeringwheelaftereach
movement.
A.Thesteeringcontrolvalveshouldrespondtoeachsteeringwheel
movement.
B.Whensteeringwheelisreleased,steeringcontrolvalveshouldreturnto
theneutralpositionwithnoadditionalturning.
4.Determineifthesteeringcylinderhasinternalleakageusingthefollowing
procedure:
HydraulicSystem:TestingtheHydraulicSystem
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SandPro
®
3040and5040
20251SLRevA