Toro Greensmaster 3120 - Page 89

TractionCircuitTesting–ChargePressureTest(continued)
A.Thechargereliefvalve(CV)inthemowermanifoldisfaulty.Repair
orreplacethechargereliefvalve(CV);refertoServicingtheMower
Manifold(page4–99).
B.Gearpump(P3)isfaulty(steering/liftcircuitperformancewillalsobe
affected).T estgearpump(P3)ow(seeGearPump(P3)FlowT est
inthischapter).
13.Sitintheoperator’sseat,releasetheparkingbrake,andapplyaloadtothe
tractionpumpbyslowlydepressingtheforwardtractionpedaluntil6895to
10342kPa(1000to1500PSI)isreachedontheowmeterpressuregauge.
14.RecordreadingonpressuregaugefromthePTportofthemowermanifold
(notthepressuregaugeontheowmeter).
15.Releasetractionpedal,movethrottletolowspeedandturntheengineOFF.
16.Chargepressure(underload)shouldnotdropmorethan20%when
comparedtochargepressure(withoutload)recordedinstep12.
Ifspecicationsarenotmet,performTractionPump(P1)FlowandTraction
ReliefPressureT estasdescribedinTractionCircuitT esting–TractionPump
(P1)FlowandReliefPressureT est(page4–47).
Greensmaster3120
Page4–43
HydraulicSystem:TestingtheHydraulicSystem
17230SLRevC