TestProcedure(continued)
12.Recordthereadingonthepressuregauge(underload).Thecharge
pressure(underload)shouldnotdropmorethan20%whencomparedto
chargepressure(withoutload)recordedinstep10.
Ifspecicationsarenotmet,performthehydraulicpumpowandtraction
reliefpressuretest;refertoTestingtheTractionCircuit–HydraulicPump
FlowandReliefPressure(MachineSerialNumbersabove316000000)
(page5–62).
13.Releasethetractionpedal,movethethrottletolowspeedposition,andshut
offtheengine.
14.Afteryoucompletethechargepressuretesting,ensurethattheengineis
notrunningandthenreleasehydraulicsystempressure;refertoReleasing
PressurefromtheHydraulicSystem(page5–6).Removetheteettingand
pressuregauge,installthehydraulictubetotheîš¿tting.
15.Installtheseatplate,lowerandsecuretheoperatorseat.
16.Starttheengine,checkforhydraulic-uidleaks,repairanyleaksasrequired,
andîš¿llthehydraulicreservoir(frontaxle)withthecorrectquantityofnew
hydraulicuidbeforereturningthemachinetoservice.
Groundsmaster
®
3280-D/3320
Page5–61
HydraulicSystem:TestingtheHydraulicSystem
05138SLRevB
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