Toro Groundsmaster 4000-D - Hydraulic System Maintenance; Replacing the Hydraulic Filters; Adjusting Counterbalance Pressure

ReplacingtheHydraulicFilters
ServiceInterval:Aftertherst200hours
Every800hours
Changethe2hydraulicltersinitiallyaftertherst200
operatinghours.Thereafter,changetheltersafter
every800operatinghours,innormalconditions.
UseTororeplacementlters(PartNo.94-2621forthe
leftsideofthemachineand75-1310fortherightside
ofthemachine).
Important:Useofanyotherltermayvoidthe
warrantyonsomecomponents.
1.Positionthemachineonalevelsurface,lowerthe
cuttingunits,stoptheengine,engagetheparking
brakes,andremovetheignitionkey.
2.Cleantheareaaroundtheltermountingarea.Place
adrainpanunderthelterandremovethelter
(Figure70).
Figure70
3.Lubricatethenewltergasketandllthelterwith
hydraulicuid.
4.Ensurethattheltermountingareaisclean.Screw
thelteronuntilthegasketcontactsthemounting
plate;thentightenthelteranadditional1/2turn.
5.Oncethereservoirislled,starttheengineandlet
itrunatlowidleforapproximatelytwominutes.
Activatesteeringandraise/lowercuttingunits
severaltimestopurgeairfromthesystem.Stopthe
engineandcheckforleaks.
CheckingtheHydraulicLines
andHoses
ServiceInterval:Every2years
Inspectthehydrauliclinesandhosesdailyfor
leaks,kinkedlines,loosemountingsupports,wear,
loosettings,weatherdeterioration,andchemical
deterioration.Makeallnecessaryrepairsbefore
operating.
Hydraulicuidescapingunderpressurecan
penetrateskinandcauseinjury.
•Makesureallhydraulicuidhosesand
linesareingoodconditionandallhydraulic
connectionsandttingsaretightbefore
applyingpressuretothehydraulicsystem.
•Keepyourbodyandhandsawayfrompin
holeleaksornozzlesthatejecthighpressure
hydraulicuid.
•Usecardboardorpapertondhydraulic
leaks.
•Safelyrelieveallpressureinthehydraulic
systembeforeperforminganyworkonthe
hydraulicsystem.
•Seekimmediatemedicalattentionifuid
isinjectedintoskin.
AdjustingtheCounterbalance
Pressure
Thecounterbalancetestport(Figure71)isused
totestthepressureinthecounterbalancecircuit.
Recommendedcounterbalancepressureis470psi(3241
kPa).Toadjustthecounterbalancepressure,rotatethe
adjustingscrew(Figure71)clockwisetoincreasethe
pressureorcounterclockwisetodecreasethepressure.
Note:Allthreesidecuttingunitscastorwheelsshould
remainonthegroundwithcounterbalanceapplied.
Figure71
1.Counterbalancetestport2.Counterbalanceadjusting
screw
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