Toro Groundsmaster 4300-D - Hydraulic System Checks; Checking Hydraulic Lines and Hoses; Cutting Unit Maintenance

CheckingtheHydraulic
LinesandHoses
ServiceInterval:Beforeeachuseordaily
Every2years—Replacethehydraulichoses.
Makeallnecessaryrepairsbeforeoperating.
WARNING
Hydraulicuidescapingunderpressurecan
penetrateskinandcauseinjury.
•Seekimmediatemedicalhelpifuidis
injectedintoskin.
•Makesurethatallhydraulic-uidhoses
andlinesareingoodconditionandall
hydraulicconnectionsandttingsaretight
beforeapplyingpressuretothehydraulic
system.
•Keepyourbodyandhandsawayfrom
pinholeleaksornozzlesthateject
high-pressurehydraulicuid.
•Usecardboardorpapertondhydraulic
leaks.
•Safelyrelieveallpressureinthehydraulic
systembeforeperforminganyworkonthe
hydraulicsystem.
Testingthe
Hydraulic-SystemPressure
Usethehydraulicsystemtestportstotestthe
pressureinthehydrauliccircuits.Contactyour
authorizedTorodistributorforassistance.
HydraulicValveSolenoid
Functions
Usethelistbelowtoidentifyanddescribethedifferent
functionsofthesolenoidsinthehydraulicmanifold.
Eachsolenoidmustbeenergizedtoallowfunction
tooccur.
Solenoid
Function
PRV2Frontmowercircuit
PRV1Rearmowercircuit
PRV
Lift/lowercuttingdecks
S1
Lowercuttingdecks
S2
Lowercuttingdecks
CuttingUnitMaintenance
SeparatingtheCuttingUnit
fromtheTractionUnit
1.Positionthemachineonalevelsurface,lower
thecuttingunitstotheoor,turnthekeyinthe
switchtotheOFFposition,andengagethe
parkingbrake.
2.Disconnectandremovethehydraulicmotor
fromthecuttingunit(Figure97).Coverthetop
ofthespindletopreventcontamination.
g011351
Figure97
1.Motor-mountingscrews
3.Removethelynchpinsecuringthedeck-carrier
frametothelift-armpivotpin(Figure98).
g031691
Figure98
1.Lynchpin
2.Lift-armpivotpin
4.Rollthecuttingunitawayfromthetractionunit.
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