Service Manual

TestingthePiston(Traction)PumpFlow
Thistestmeasuresthepiston(traction)pumpoutput(ow).Duringthistest,
thepumploadiscreatedattheowmeterusingtheadjustableloadvalveon
thetester.
Note:Beforeperformingthepistonpumpowtest,ensurethatthetraction
speedissetto100%usingtheInfoCentersettingsmenu.
IMPORTANT
Atnormalenginehigh-idlespeed,thetractioncircuitowforthe
Groundsmaster5900or5910machinesexceeds150L/minute
(40gallons/minute).Forthistest,usea40GPMHydraulicTester
#AT40002(pressureandow)andHydraulicHoseKit;referto
SpecialTools(page4–42).Ensurethattheenginespeedisadjusted
asdescribedinthefollowingtestprocedure.Iftheenginerunsat
normalhigh-idlespeedwhiletesting,thehydraulictestermayget
damage.
CAUTION
Performingtestingonthehydraulicsystemcancausepersonal
injuryanddamagetotheequipment.
ReadallWarning,Cautions,andprecautionsatthebeginningof
thissection.
Note:Twopeoplearerequiredtocompletethefollowingtestprocedure.
1.Parkthemachineonalevelsurface,lowerthecuttingdecks,shutoffthe
engine,settheparkingbrake,andensurethatthehydraulicuidisatnormal
operatingtemperature.
CAUTION
Duringthistestallthewheelswillbeoffthegroundandrotating.
Ensurethatthemachineissupportedsothatitwillnotmoveand
accidentallyfalltopreventinjuringanyonenearthemachine.
2.Liftandsupportthemachinesothatallthewheelsareofftheground;refer
toJackingInstructions(page1–5).
HydraulicSystem:TestingtheHydraulicSystem
Page4–68
Groundsmaster5900TractionUnit
08159SLRevC