Toro Groundsmaster 4300-D - Page 142

TestProcedure(continued)
10.Ifthemeasuredpressureisincorrect,removethepressurereducingvalve
(PRV)fromtheliftcontrolmanifoldandcleanorreplacethevalve;referto
ServicingtheLiftControlManifold(page4–142).
11.Also,iftheliftcircuitpressureislow,checkfortherestrictioningearpump
inletline.TheInternalliftcylinderleakagewouldalsocauselowliftcircuit
pressure;refertoT estingtheLiftCircuit–LiftCylinderInternalLeakage(page
4–81).Thegearpump(P4)couldalsobesuspectedforwear,damageor
inefciency;refertoT estingtheLiftCircuit–GearPump(P4)Flow(page
4–84).
12.Afteryoucompletethetesting,shutofftheengine,anddisconnectthe
pressuregaugefromtheliftcontrolmanifoldtestport.
13.Starttheengine,checkforhydraulic-uidleaks,repairanyleaksasrequired,
andllthehydraulictankwiththecorrectquantityofnewhydraulicuid
beforereturningthemachinetoservice.
HydraulicSystem:TestingtheHydraulicSystem
Page4–80
Groundsmaster
®
4300-D
16226SLRevC