Service Manual

ProcedureforGearPumpFlowTest(continued)
6.Startengineandincreaseenginespeedtohighidlespeed.Donotengage
thecuttingdecks.
IMPORTANT
Donotfullyrestrictoilowthroughtester.Inthistest,theowtester
ispositionedbeforethereliefvalve.Pumpdamagecanoccurifthe
oilowisfullyrestricted.
7.Watchpressuregaugecarefullywhileslowlyclosingtheowcontrolvalve
until69bar(1000PSI)isobtained.VerifywiththeInfoCenterdisplaythatthe
engineisstillrunningatthecorrecthighidlespeed.
Note:Ifenginespeeddropsduringtesting,pumpowwilldecreaseand
owtestresultswillbeinaccurate.
8.Normalowindicationforthefour(4)gearpumpsectionsislistedinbelow
table:
PUMPSECTIONNORMALFLOWMINIMUMFLOW
FRONTSECTION53LPM(14GPM)41.6LPM(11GPM)
SECONDSECTION53LPM(14GPM)41.6LPM(11GPM)
THIRDSECTION16.3LPM(4.3GPM)12.8LPM(3.4GPM)
FOURTHSECTION12.1LPM(3.2GPM)9.5LPM(2.5GPM)
9.Shutoffengineandrecordtestresults.
10.Ifapressureof69bar(1000PSI)cannotbeobtainedorowwaslessthan
theminimumowlistedinabovetable,checkforrestrictioninthepump
intakeline.Iflineisnotrestricted,considerthatthetestedgearpumpsection
iswornordamaged.
11.Aftertestingiscompleted,disconnectowtesterfromhydraulichoseand
ttingingearpumpsection.Reconnecthosetothepumptting.
12.Lowerandsecureoperatorseat.
Groundsmaster
®
4000-D&4010-D
Page5–81
HydraulicSystem:Testing
13202SLRevF