Toro Groundmaster Series - Testing the Steering and Lift Circuit - Gear Pump (P2) Flow and Circuit Relief Valve

TestingtheSteeringandLiftCircuit–GearPump(P2)Flowand
CircuitReliefValve
g299871
Figure37
GearPump(P2)FlowandCircuitReliefValve
Gearpump(P2)isdesignedtosatisfybothsteeringcylinderandliftcylinder
needssimultaneously(atfullspeedthrottle).TheGearPump(P2)FlowT est
comparesuidowatNoLoadwithuidowUnderLoad.Adropinowunder
loadofmorethan15%indicatesthegearsandwearplatesinthepumphave
worn.Continuedoperationwithawornpumpcangenerateexcessiveheatand
causedamagetothesealsandothercomponentsinthehydraulicsystem.
Thereliefvalveforthesteeringandliftcircuitisintegratedintothesteering
controlvalve.Ifbothsteeringandliftoperationsperformpoorly,performthegear
pump(P2)owtestandthecircuitreliefvalvetest.
Ifmachinesteeringissluggishorotherwiseperformspoorly,refertoT estingthe
SteeringandLiftCircuit–SteeringCylinderandCircuitReliefValve(page5–45).
HydraulicSystem:TestingtheHydraulicSystem
Page5–40
Groundsmaster
®
3200,3300and3310
19240SLRevA