Toro Groundmaster Series - Page 112

TestProcedure
Thechargepressuretestistherstinaseriesoftestsrecommendedto
determinetractioncircuitperformance.Achargepressuredropofmorethan
20%whenamoderateloadisplacedonthepiston(traction)pumpindicates
aninternalleakinthepiston(traction)pump.Reducedchargepressuremay
alsoindicateafaultyreliefvalve(R4)inthesteeringcontrolunit.Continued
unitoperationcangenerateexcessiveheat,causedamagetosealsandother
componentsinthehydraulicsystem,andaffectoverallmachineperformance.
SpecialEquipmentRequired:
•PressureGauge(accuratebelow300psi)withhoseandquickdisconnect
coupling
•Flowmeterwithpressuregaugethathasatleasta114L/minute(30
gallons/minute)capacity.
•2HydraulicHoses
1.Parkthemachineonalevelsurface,lowerthecuttingunit(orattachment),
andsetthekeyswitchtotheOFFposition.
2.ReadandadheretotheinformationprovidedinT estingtheHydraulicSystem
(page5–22).
3.EnsurethatthetractionpedaliscorrectlyadjustedfortheNEUTRALposition;
refertoAdjustingtheTractionSystemforNeutral(page5–50).Also,ensure
thatthehydraulicpumpisatfullstrokewhentractionpedalispressedfullyin
forwardposition.
4.Connectahydraulicpressuregaugetothediagnosticttingatthemain
hydraulicmanifoldG2port.
g299124
Figure29
1.Mainhydraulicmanifold3.Hydraulicpump(P1)
2.Diagnostictting–G2port
4.Hydraulictube
HydraulicSystem:TestingtheHydraulicSystem
Page5–26
Groundsmaster
®
3200,3300and3310
19240SLRevA