Toro Groundsmaster 4300-D - Page 132

TestProcedure
1.ParkthemachineonalevelsurfacewiththePTOswitchoff,lowerthecutting
decks,shutofftheengine,mowspeedlimiterisintheMOWposition,and
settheparkingbrake.
CAUTION
Beforeopeningthehydraulicsystem,operateallthehydraulic
controlstoreleasesystempressureandavoidinjuryfromthe
pressurizedhydraulicuid;refertoReleasingPressurefromthe
HydraulicSystem(page4–6).
2.ReadallWarning,Cautions,andprecautionslistedatthebeginningofthis
section.
g189658
Figure69
1.PumpP1outlethose
3.Gearpumpassembly
2.PumpP2outlethose
3.Liftandsupporttheoperatorseattogetaccesstothehydraulicpump.
4.Identifythesuspectpumpsectionthatistobetested(Figure69).
5.Cleanthejunctionofthegearpumpttingandthehydraulicoutlethose,and
thendisconnectthehosefromthepumptting:
•Pumpsection(P1)fortherearcuttingdecks.
•Pumpsection(P2)forthefrontcuttingdecks.
IMPORTANT
Ensurethattheuidowindicatorarrowontheowgaugeis
showingthattheuidwillowfromthegearpump,throughthe
tester,andintothehose.Theengineneedstobestartedwiththe
testerconnected.Routethetesterhosessothatthetestercanbe
readwhileoperatorseatisfullyloweredandoccupied.
6.Installatesterwiththepressuregaugeandowmeterinseriesbetweenthe
disconnectedhoseandthegearpumptting.Ensurethattheowcontrol
valveonthetesterisfullyopen.
HydraulicSystem:TestingtheHydraulicSystem
Page4–70
Groundsmaster
®
4300-D
16226SLRevC