Toro Groundsmaster 4300-D - Testing the Lift Circuit-Gear Pump (P4) Flow

TestingtheLiftCircuit–GearPump(P4)Flow
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Figure77
Thegearpump(P4)isdesignedtosatisfytheliftcylinderneeds(atfullspeed).
Thegearpump(P4)owtestcomparesuidowatNoLoadwithuidow
UnderLoad.Adropinowunderloadofmorethan15%indicatesthegearsand
wearplatesinthepumphaveworn.Continuedoperationwithawornpumpcan
generateexcessiveheatandcausedamagetothesealsandothercomponents
inthehydraulicsystem.
SpecialEquipmentRequired:Flowmeterwithpressuregaugethathasatleasta
16L/minute(5gallons/minute)capacity.
Note:Iftheowfromgearpump(P4)islow,theoperationofalltheliftcylinders
willbeaffected.
HydraulicSystem:TestingtheHydraulicSystem
Page4–84
Groundsmaster
®
4300-D
16226SLRevC