Toro Groundsmaster 5910 Series - Page 170

ProcedureforGearPumpFlowTest(continued)
IMPORTANT
Topreventhydraulictesterdamage,use40GPMHydraulicTester
#AT40002(pressureandow)andHoseKitforthistest(seeSpecial
Tools(page2–15)).
IMPORTANT
Makesurethattheoilowindicatorarrowontheowgaugeis
showingthattheoilwillowfromthehydraulichosefromthepump,
throughthetesterandintothemanifoldtting.
3.Install40GPMtester(owandpressure)inserieswiththedisconnected
hoseandhydraulicttinginmanifold.
4.Makesuretheowcontrolvalveontesterisfullyopen.
5.Startengineandincreaseenginespeedtohighidlespeed(2530RPM).Do
notengagethecuttingdecks.Checkforhydraulicleakageattestconnection
andcorrectbeforeproceedingwithtest.
6.Makesurehydraulicoilisatnormaloperatingtemperature(54to66ºC(130
to150ºF))byoperatingthemachineforapproximatelyten(10)minutes.
Makesurethehydraulicreservoirisfull.
IMPORTANT
Donotfullyrestrictoilowthroughtester.Inthistest,theowtester
ispositionedbeforethecircuitreliefvalve.Pumpdamagecanoccur
iftheoilowisfullyrestricted.
7.Watchpressuregaugecarefullywhileslowlyclosingtheowcontrolvalve
until69bar(1000PSI)isobtained.VerifywiththeInfoCenterdisplaythatthe
engineisstillrunningatthecorrecthighidlespeed(2530RPM).
Note:Ifenginespeeddropsduringtesting,pumpowwilldecreaseand
owtestresultswillbeinaccurate.
8.Normalowindicationforthethree(3)gearpumpsectionsislistedinbelow
table:
PUMPSECTIONNORMALFLOWMINIMUMFLOW
FIRSTSECTION83LPM(22GPM)74LPM(19.6GPM)
SECONDSECTION83LPM(22GPM)74LPM(19.6GPM)
THIRDSECTION40LPM(10.6GPM)36LPM(9.5GPM)
9.Oncethegearpumpsectionowhasbeendetermined,opentesterow
controlvalveandstopengine.Recordtestresults.
HydraulicSystem:Testing
Page5–70
Groundsmaster
®
5900&5910
16227SLRevB