Toro Groundsmaster 5900 Series - Page 143

ProcedureforTractionCircuitReliefPressureTest
1.Makesurehydraulicoilisatnormaloperatingtemperature(54to66ºC(130
to150ºF))byoperatingthemachineforapproximatelyten(10)minutes.
Makesurethehydraulictankisfull.
CAUTION
PerformTractionCircuitReliefPressureTestinanopenarea,away
frompeopleandobstructions.
2.Drivemachinetoanopenarea,fullyraisecuttingdecks,engageparking
brakeandturntheengineoff.
FRONT
1 3 4
2
g287737
Figure52
1.Forwardtestport(MA)3.Forwardreliefvalve
2.Reversetestport(MB)
4.Reversereliefvalve
3.Connecta700Bar(10,000PSI)pressuregaugewithhydraulichoseattached
totractioncircuittestportforfunctiontobechecked(Figure52).Route
gaugehosetoallowoperatortoviewthegauge.
4.Afterinstallingpressuregauge,startengineandrunatlowidlespeed.Check
forhydraulicleakageattesterconnectionsandcorrectbeforeproceeding
withtest.
5.Sitonseatandoperatetheengineathighidlespeed(2530RPM).Makesure
thatmachineisinthehighrangetractionspeed(transport).
6.Drivemachinesofronttiresarewedgedagainstanimmovableobject(e.g.a
curb)topreventwheelrotationinthedirectiontobetested.Analternative
wouldbetopositionthemachineonaninclinedsurfacetoallowahigh
tractionloadinthedirectiontobetested.
7.Slowlydepressthetractionpedalintheappropriatedirection(forwardor
reverse).Whilepushingtractionpedal,lookatpressurereadingongauge.
Asthetractionreliefvalvelifts,thegaugeneedlewillstopmomentarily.
GAUGEREADINGTOBE:
402to411bar(5825to5965PSI)inforward(MAport)
397to407bar(5760to5910PSI)inreverse(MBport)
8.Releasetractionpedalandstopengine.Recordtestresults.
Groundsmaster
®
5900&5910
Page5–43
HydraulicSystem:Testing
16227SLRevB