Toro 08743 - Page 107

LoadwithuidowUnderLoad.Adropinowunderloadofmorethan12%
indicatesaninternalleakormalfunctioningreliefvalveinthehydraulicpump.
Thenaltractioncircuittestisverifyingthehydraulicpumpforwarddirection
reliefvalveoperation.Awornhydraulicpumpormalfunctioningreliefvalveis
lessefcient.Eventually,enoughuidbypasswillcausetheunittostallunder
heavyloadconditions.Continuedoperationcangenerateexcessiveheat,cause
damagetosealsandothercomponentsinthehydraulicsystem,andaffect
overallmachineperformance.
SpecialEquipmentRequired:
•Flowmeterwithpressuregaugethathasatleasta57liters/minute(15
gallons/minute)capacity
•Hydraulictesthose
•Non-contacttachometer(phototach)
IMPORTANT
RefertoTractionCircuitComponentFailure(page5–5)for
informationregardingtheimportanceofremovingcontamination
fromthetractioncircuit.
TestProcedure
1.Parkthemachineonalevelsurface,loweranyattachments,andsetthekey
switchtotheOFFposition.
2.ReadandadheretotheinformationprovidedinT estingtheHydraulicSystem
(page5–23).
3.EnsurethatthetractionpedaliscorrectlyadjustedfortheNEUTRALposition;
refertoAdjustingtheTractionSystemforNeutral(page5–52).
WARNING
ReviewandfollowtheJackingInstructions(page1–6)beforelifting
themachine.
4.Raiseallofthewheelsoffthegroundandsupportthemachinewithjack
stands.
5.Ensuretheparkingbrakeisdisengaged.
6.Cleanthehydraulichoseandhydraulictubeabovethefrontwheel;refer
toFigure37.
SandPro
®
3040and5040
Page5–37
HydraulicSystem:TestingtheHydraulicSystem
20251SLRevA