Toro Groundsmaster 4300-D - Page 147

TestProcedure
1.ParkthemachineonalevelsurfacewiththePTOswitchoff,lowerthecutting
decks,shutofftheengine,mowspeedlimiterisintheMOWposition,and
settheparkingbrake.
CAUTION
Beforeopeningthehydraulicsystem,operateallthehydraulic
controlstoreleasesystempressureandavoidinjuryfromthe
pressurizedhydraulicuid;refertoReleasingPressurefromthe
HydraulicSystem(page4–6).
2.ReadallWarning,Cautions,andprecautionslistedatthebeginningofthis
section.
g189901
Figure78
1.Gearpump(P4)
2.Hydraulichose
3.Liftandsupporttheoperatorseatandremovetheoorplatetogetaccessto
thehydraulicpump.
4.Cleanthehydraulichoseendandthepumpttingattheoutletofpump(P4)
(Figure78).
IMPORTANT
Ensurethattheuidowindicatorarrowontheowgaugeis
showingthattheuidwillowfromthepump(P4),throughthe
tester,andtotheliftcontrolmanifold.
5.Connectthetesterinlettothepumptting,andconnectthetesteroutletto
thedisconnectedhydraulichose.Ensurethattheowcontrolvalveontester
isfullyopen.
6.Starttheengineandrunitatlow-idlespeed.Checkforhydraulic-uidleaks
fromthetestconnectionsandcorrectbeforecontinuingthetest.
7.Withtheenginerunning,presstheenginespeedswitchtofullspeed(3,005
to3,055rpm)position.UsetheInfoCentertocheckthattheenginespeedis
correct.
Groundsmaster
®
4300-D
Page4–85
HydraulicSystem:TestingtheHydraulicSystem
16226SLRevC