Toro Groundsmaster 4300-D - Page 112

wheelmotorislessefcient.Eventually,enoughuidbypasswillcausethe
wheelmotortostallunderheavyloadconditions.Continuedoperationcan
generateexcessiveheat,causedamagetothesealsandothercomponentsin
thehydraulicsystem,andaffectoverallmachineperformance.
Therearemomentsduringwheelmotoroperation(gerollerposition)whenuid
owthroughthemotorislessrestricted.Ifawheelmotoristestedinthisposition,
thetestresultswillbehigherandshouldnotbeusedtodeterminewheelmotor
efciency.Testthewheelmotorsin3differentwheelpositionstoobtainaccurate
testresults.Recordthetestreadingsforallthe3wheelpositions.Intheforward
direction,hydraulicuidowsthroughbothfrontwheelmotors(inparallel)before
passingthroughtherearwheelmotorontheoppositesideofthemachine.In
thereversedirection,hydraulicowbypassestherearwheelmotors.Startby
testingthefrontwheelmotorscombined,thentestthefrontwheelorrearwheel
motorsindividuallyasnecessary.
SpecialEquipmentRequired:
•Pressuregauge
•Flowmeterwithpressuregaugethathasatleasta68L/minute(18
gallons/minute)capacity
IMPORTANT
RefertoTractionCircuitComponentFailure(page4–7)for
informationregardingtheimportanceofremovingcontamination
fromthetractioncircuit.
g189656
Figure56
1.Tractionpump
4.Hydraulichose(forward)
2.Leftelbowtting5.Rightelbowtting
3.Hydraulichose(reverse)
1.ParkthemachineonalevelsurfacewiththePTOswitchoff,lowerthecutting
decks,shutofftheengine,andsettheparkingbrake.
2.ReadallWarning,Cautions,andprecautionslistedatthebeginningofthis
section.
HydraulicSystem:TestingtheHydraulicSystem
Page4–50
Groundsmaster
®
4300-D
16226SLRevC