Toro Groundmaster Series - Page 113

TestProcedure(continued)
5.Cleanthettingsandthehydraulictubeshown;refertoFigure29.
6.Removethehydraulictubeanduse2hydraulichosestoinstallthetesterto
theexposedttings.Makesurethetesterisinstalledinthecorrectow
direction(towardthewheelmotors)andthetesterowcontrolvalveisfully
open.
7.Attachaheavychaintotherearofthemachineframeandanimmovable
objecttopreventthemachinefrommovingduringtesting.
8.Blockthewheelswithchockstopreventthewheelrotationduringtesting.
9.Starttheengineandrunitatlow-idlespeed.Correctanyhydraulicuidleaks
atthetestconnectionsbeforecontinuingthetest.
10.Starttheengineandmovethethrottletothefullspeed:
•Model31900and31901=3235rpm
•Model31902and31903=3150rpm
•Model31907and31909=3235rpm
11.Makesurehydraulicuidisatnormaloperatingtemperaturebyoperatingthe
machineforapproximately10minutes.
12.UsetheTDMdisplay/controllerscreentoverifytheenginespeed.
13.RecordthereadingonthepressuregaugeattheG2portofthemain
manifold(notthepressuregaugeontheowmeter).Thechargepressure
(withoutload)shouldread895to1035kPa(130to150psi).Ifthecharge
reliefpressurespecicationisnotmet,considerthefollowing:
A.Thehydraulicpumpchargereliefvalve(R3)isdamaged.Replaceor
repairthehydraulicpumpchargereliefvalve;refertoServicingthe
Traction(piston)Pump(P1)(page5–73).
B.Gearpump(P2)isfaulty(steeringandliftcircuitperformancewillalsobe
affected).Testgearpump(P2)ow;refertoT estingtheSteeringandLift
Circuit–GearPump(P2)FlowandCircuitReliefValve(page5–40).
C.Sitintheoperator’sseat,releasetheparkingbrake,andapplyaloadto
thetractionpumpbyslowlydepressingtheforwardtractionpedaluntil
6895to10342kPa(1000to1500PSI)isreachedontheowmeter
pressuregauge.
14.RecordreadingonpressuregaugeattheG2portofthemainmanifold(not
thepressuregaugeontheowmeter).
15.Releasethetractionpedal,movethethrottletolowspeedandsetthekey
switchtotheOFFposition.
16.Chargepressure(underload)shouldnotdropmorethan20%when
comparedtochargepressure(withoutload)recordedinstep13.
Ifspecicationsarenotmet,leavethetestequipmentinstalledandperform
thePiston(traction)Pump(P1)FlowandReliefPressureT estasdescribed
inT estingtheTractionCircuit–Piston(traction)Pump(P1)FlowandRelief
Pressure(page5–37).
17.Aftertesting:
A.Removethehydraulichosesandtester.
B.Installthehydraulictubepreviouslyremoved.
C.Disconnectthepressuregaugefromthediagnosticttingatthemain
manifold.
D.Checkandadjustthelevelofthehydraulicuidinthehydraulicreservoir;
refertothetractionunitOperator’sManual.
Groundsmaster
®
3200,3300and3310
Page5–27
HydraulicSystem:TestingtheHydraulicSystem
19240SLRevA