Toro Reelmaster 3100-D - Page 115

TractionCircuitTesting−PistonPump/Hydrostat(P3)Flowand
ReliefPressureTest(continued)
B.Applyanadditionalloadof68.9to103.4Bar(1000to1500PSI)by
slowlyclosingtheowmeter.Theowmeterpressuregaugeshould
read117.2to144.8Bar(1700to2100PSI).
C.Recordtesterpressureandowreadings.
13.Verifytractionreliefvalveoperationasfollows:
A.Returnthetractionpedaltoneutral.
B.Fullyclosetheowmeterowcontrolvalve.
C.Depressthetractionpedalslowly.
Systempressureshouldreach248to251Bar(3600to3650PSI)before
thereliefvalveopens.
Note:Thereliefvalvesettingis241Bar(3500PSI).Anadditional6.9
to10.3Bar(100to200PSI)isnecessarytoovercomesystemcharge
pressurebeforethereliefvalveopens.
D.Recordtesterpressurereading.
E.Releasetractionpedal,openowcontrolvalvefully,movethrottleto
lowspeedandturntheengineoff.
14.Ifreliefpressurecannotbemetorisgreaterthanspecied,thetractionrelief
valveisfaultyandshouldbereplaced.
15.TheUnderLoadtestowreading(12)shouldnotdropmorethan12%when
comparedtotheNoLoadtestowreading(11).Adifferenceofmorethan
12%mayindicate:
A.Thehydrostatbeltiswornand/orslipping.
B.Thepistonpump/hydrostatiswornandshouldberepairedorreplaced.
16.Disconnecttesterandreconnecthosetopump.
Reelmaster
®
3100-D/3105-D
Page5–39
HydraulicSystem:Testing
20252SLRevA