Toro Groundsmaster 4500-D Series - Page 179

ProcedureforLift/LowerCircuitReliefPressureTest
Thelift/lowercircuitreliefpressuretestshouldbeperformedtomakesurethat
thecuttingunitliftandlowercircuitreliefpressureiscorrect.
CAUTION
Preventpersonalinjuryand/ordamagetoequipment.Readall
WARNINGS,CAUTIONSandPrecautionsforHydraulicTestingatthe
beginningofthissection.
1.Makesurehydraulicoilisatnormaloperatingtemperaturebyoperating
themachineforapproximatelyten(10)minutes.Makesurethehydraulic
reservoirisfull.
2.Parkmachineonalevelsurfacewiththecuttingdecksfullyraised.Apply
theparkingbrakeandstopengine.
FRONT
g308511
Figure86
GM4500-D
1.T estportG12.Reliefvalve
FRONT
g308512
Figure87
GM4700-D
1.T estportG12.Reliefvalve
3.Raiseandsupportseattogainaccesstoliftcontrolmanifold(Figure86or
Figure87).Connecta350bar(5000PSI)pressuregaugewithhydraulic
hoseattachedtoliftmanifoldtestportG1.Routegaugehosetoallowhood
tobesafelylowered.
4.Sitontheseatandstarttheengine.Increaseenginespeedtohighidle
speed.
5.Whilesittingontheseat,withthecuttingdecksfullyraised,monitorthe
pressuregaugetoidentifylift/lowercircuitpressurewithnoload.Record
thispressure.
Groundsmaster
®
4500-D/4700-D
Page5–77
HydraulicSystem:Testing
19245SLRevA