Toro Groundsmaster 7210 - Page 112

Performthegearpumpowtestifyouidentifyacuttingdeck(orimplement)
raiseandlowerproblem.Thistestdeterminesifthehydraulicowfromthe
gearpumpiscorrect.
TestProcedure
Note:Overaperiodoftime,thegearsandwearplatesinthegearpumpcan
wear.Awornpumpmaybypassthehydraulicuidandmakethepumpless
efcient.Aftersometime,sufcientuidlossmightoccurandcausethecutting
deckliftcylindertooperateslowly.Optionalhydrauliccylindersandmotor,if
equipped,willalsoloseefciency.Continuedoperationwithaworn,inefcient
pumpcangenerateexcessiveheat,causedamagetothesealsandother
componentsinthehydraulicsystem.
1.Ensurethatthehydraulicuidisatnormaloperatingtemperature.
2.EnsurethatthetractiondriveiscorrectlyadjustedfortheNEUTRALposition.
WARNING
Beforedisconnectingordoinganyworkonthehydraulicsystem,
releaseallthepressureinthesystem;refertoReleasingPressure
fromtheHydraulicSystem(page4–11).
g033408
Figure49
1.Liftcontrolmanifold2.Hosefromthegearpump
3.Parkthemachineonalevelsurface,lowerthecuttingdeck(orimplement),
shutofftheengine,andsettheparkingbrake.
4.ReadallWarning,Cautions,andprecautionslistedatthebeginningofthis
section.
5.Cleanthejunctionofthehydraulichoseandupperttingonthefrontofthe
liftcontrolmanifold.
6.Disconnectthehydraulichosefromtheupperttingonthefrontofthelift
controlmanifold(Figure49).Thishoseisfromthegearpumpoutletand
providesuidowtotheliftcontrolmanifold.
7.Installahydraulictester(pressureandow)inserieswiththegearpump
ttinganddisconnectedhose.Ensurethatthetesterowarrowpointsfrom
thepumpoutletportandtowardthedisconnectedhose.Ensurethatthe
ow-controlvalveonthetesterisfullyopen.
HydraulicSystem:TestingtheHydraulicSystem
Page4–52
Groundsmaster7210
16222SLRevC