Toro Groundsmaster 4300-D - Page 113

3.EnsurethatthetractionpedaliscorrectlyadjustedfortheNEUTRALposition;
refertotheOperator’sManual.
4.Attachaheavychaintotherearofthemachineframeandanimmovable
objecttopreventthemachinefrommovingduringtesting.
TestingtheFrontWheelMotors
Hydraulicuidowsthroughbothfrontwheelmotors(inparallel)beforepassing
throughtherearwheelmotors(inseries).Toaccuratelytestthefrontwheel
motors,therearwheelmotorsmustberemovedfromthetractioncircuit.
1.Warmoilaftertestequipmentisconnectedtopreventtechnicianfrom
workingonahotmachine—applicabletotestswhenpossible(anytestthat
requiresanopenun-pluged/cappedline(casedraintests)wouldnotapply
andoilshouldbewarmedbeforedisconnectingthelines).
CAUTION
Beforeopeningthehydraulicsystem,operateallthehydraulic
controlstoreleasesystempressureandavoidinjuryfromthe
pressurizedhydraulicuid;refertoReleasingPressurefromthe
HydraulicSystem(page4–6).
2.Cleanthejunctionofthehydraulichoseandrightsideelbowttingonthe
bottomofthetractionpump.Disconnectthehydraulichosefromtheright
sideofthepumptting(Figure56).
IMPORTANT
Ensurethattheuidowindicatorarrowontheowmeteris
showingthattheuidwillowfromthepump,throughthetester,
andintothedisconnectedhydraulichose.
3.Installatesterwiththepressuregaugeandowmeterinseriesbetweenthe
tractionpumpanddisconnectedhydraulichose.Ensurethattheowcontrol
valveonthetesterisfullyopen.
4.Disconnectboththehydrauliclinesfromeachrearwheelmotor,then
connectthelinestoeachother.Plugtheportsinwheelmotorstoprevent
contamination.
5.Blockthefrontwheelswithchockstopreventwheelrotation.
6.Withtheenginerunning,presstheenginespeedswitchtofullspeed(3,005
to3,055rpm)position.UsetheInfoCentertocheckthattheenginespeedis
correct.
CAUTION
Thefrontwheelmotorswilltrytomovethemachineforward.
Useextremecautionwhenperformingthetest.
7.Slowlypressthetractionpedalintheforwarddirectionuntil6,900kPa(1,000
psi)isdisplayedonthetesterpressuregauge.Ensurethatthefrontwheels
arenotrotatingandrecordtheowmeterreading.
8.Releasethetractionpedal,shutofftheengine,rotateboththefrontwheels
90°andthentestagain.Releasethetractionpedal,shutofftheengine,
Groundsmaster
®
4300-D
Page4–51
HydraulicSystem:TestingtheHydraulicSystem
16226SLRevC