Toro Groundsmaster 4300-D - Page 144

TestProcedure
Note:Whenperformingtheliftcylinderinternalleakagetest,thecuttingdecks
shouldbeattachedtotheliftarms.
g189903
Figure76
1.#5liftcylinder
3.Hydraulichose
2.Cylinderrodendtting
1.ParkthemachineonalevelsurfacewiththePTOswitchoff,positionthe
cuttingdecksintheturn-aroundposition,shutofftheengine,andsetthe
parkingbrake.
2.Fortheliftcylinderthatistobetested,useajacktoraisetheliftarmslightly.
Thisremovestheloadfromtheliftcylinderandreleasestheliftcylinder
hydraulicpressure.
3.Supporttheliftarmwithjackstandstopreventtheliftarmfromlowering.
Note:Ifeitheroftherearliftcylindersisbeingtested,boththerearliftarms
needtobesupported.
4.Cleantheareaaroundthehydraulichoseendattherodendofthelift
cylinder.Disconnectthehydraulichosefromtheliftcylinderbarrelendtting
(Figure76).
IMPORTANT
Whencappingtheliftcylinderttingandhydraulichoseend,use
asteelcapandplugtoensurethatthereisnouidleakage.The
plasticplugscannotholdthehydraulicpressurethatisdeveloped
duringthistestprocedure.
5.Installasteelcapontheopenliftcylinderttingtosealtheliftcylinder.Also,
installasteelplugintheopenendofthedisconnectedhosetoprevent
leakageorcontamination.
6.Raisetheliftarmslightlywithajackandremovethejackstand,thenlower
andremovethejack.
7.Thecappedliftcylindershouldbeabletosupportthecuttingdecklong
enoughforthemachinetomovefromonecuttingareatoanotherduring
operation.
HydraulicSystem:TestingtheHydraulicSystem
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Groundsmaster
®
4300-D
16226SLRevC