Toro ProLine H800 - Testing the Traction Circuit - Hydraulic Pump Flow and Relief Pressure

TestingtheTractionCircuit-HydraulicPumpFlowandRelief
Pressure
g292558
Figure51
Thehydraulicpumpowtestisthethirdinaseriesoftestsrecommendedto
determinethetractioncircuitperformance.Thistestcomparesuidowatno
loadwiththeuidowunderload.Adropinowunderloadofmorethan12%
indicatesaninternalleakormalfunctioningreliefvalveinthehydraulicpump.
Thenaltractioncircuittestisverifyingthehydraulicpumpreliefvalveoperation.
Awornhydraulicpumpormalfunctioningreliefvalveislessefcient.Enough
uidbypasswillcausethewheelmotortostallunderheavyloadconditions.
Continueduseofawornwheelmotorwillgenerateexcessiveheat,causing
damagetosealsandothercomponentswithinthehydraulicsystem.
SpecialEquipmentRequired:
•Flowmeterwithpressuregaugethathasatleasta144L/min(30GPM)
capacity.
•Phototach(non-contacttachometer).
HydraulicSystem:TestingtheHydraulicSystem
Page5–44
ProLineH800
19241SLRevB