Toro Groundsmaster 3280-D - Charge Pump Flow Test (Using Tester with Pressure Gauges and Flow Meter) (Machine Serial Numbers below 316000000)

ChargePumpFlowTest(UsingTesterWithPressureGaugesand
FlowMeter)(MachineSerialNumbersbelow316000000)
Thechargepumpowtestshouldbeperformedifahydraulicproblemis
identiedthataffectsboththesteeringandliftcircuits.
Note:Thechargepumpprovidesmake-upuidforinternalhydrostat
componentsbeforeowisavailableforthesteeringandliftcircuits.Flow
measuredinthistestwillbelessthantotalchargepumpoutput.
1.Ensurethatthehydraulicuidisatnormaloperatingtemperatureby
operatingthemachineforapproximately10minutes.
2.Parkmachineonalevelsurfacewiththecuttingdeck(orimplement)lowered
andPTOswitchoff.Ensurethattheengineisshutoff.Settheparkingbrake
andblockthefrontwheelstopreventmachinemovement.
3.ReadallWarning,Cautions,andprecautionslistedatthebeginningofthis
section.
CAUTION
Beforeopeninghydraulicsystem,operateallhydrauliccontrolsto
relievesystempressureandavoidinjuryfrompressurizedhydraulic
uid.
g230808
Figure66
1.Hydrostatictransmission
3.O-ring
2.Hydraulichose
4.Outlettting
4.Placeadrainpanunderthetransmission.Cleantheareaaroundthe
transmissionchargepumpoutlet(pressure)tting(Figure66).Disconnect
thehydraulichosefromtheoutlettting.
IMPORTANT
Ensurethattheuidowindicatorarrowontheowmeteris
showingthattheuidwillowfromthepump,throughthetester
andtothehydraulichose.
5.Connectinlethoseoftesterwithpressuregaugesandowmetertothe
transmissionchargepumpoutlet(pressure)tting.Connectthetesteroutlet
hosetothehydraulichosedisconnectedfromthetransmissionttinginstep
5.
Groundsmaster
®
3280-D/3320
Page5–57
HydraulicSystem:TestingtheHydraulicSystem
05138SLRevB