Toro 08743 - Page 103

TestProcedure(continued)
g355127
Figure34
1.Hydraulictube2.Hydraulichose
B.Disconnectthehydraulichoseatthehydraulictubeabovethefront
wheelmotor.Useanadditionalhydraulichosetoinstallthetesterto
theexposedttings.Makesurethetesterisinstalledinthecorrectow
direction(towardthefrontwheelmotor)andthetesterowcontrolvalve
isfullyopen.
C.Blockthefrontwheelwithchockstopreventthewheelfromrotating
duringtesting.
D.Starttheengineandrunitatlow-idlespeed.Correctanyhydraulicuid
leaksatthetestconnectionsbeforecontinuingthetest.
E.Setthethrottletothefullspeed(3,400to3,500RPM).Verifytheengine
RPMatthedrivehubsorrubbercouplingwithanon-contacttachometer
(phototach).
F.Makesurehydraulicuidisatnormaloperatingtemperaturebyoperating
themachineforapproximately10minutes.
G.Ensuretheparkingbrakeisdisengaged.
H.Sitintheoperatorseatandslowlypushthetractionpedalintheforward
directionuntil69.0bar(1000PSI)isdisplayedonthetesterpressure
gauge.
I.Withthefrontwheellocked(notrotating),theinternalleakageforthefront
wheelmotorwillbeshownontheowmeter.Recordthetestresults.
J.Releasethetractionpedal,shutofftheengine,androtatethefrontwheel
90°.Testagainandrecordtheowmeterreading.
K.Releasethetractionpedal,shutofftheengine,androtatethefrontwheel
180°.T estagainandrecordtheowmeterreading.
L.Usetheaverageofthe3owmeterreadingstojudgethewheelmotor
performance.Testingofwheelmotorleakageinthe3differentwheel
positionswillprovidethemostaccuratetestresults.Theowthrough
frontwheelmotorshouldbelessthan4LPM(1GPM).
M.Removethetesthydraulichoseandtester,thenreconnectthehydraulic
tubeandhoseabovethefrontwheel.
6.Totesteitheroftherearwheelmotors:
SandPro
®
3040and5040
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HydraulicSystem:TestingtheHydraulicSystem
20251SLRevA