Toro Groundsmaster 7210 - Page 113

TestProcedure(continued)
8.Starttheengineandrunitatlow-idlespeed(1,400rpm).Checkfor
hydraulic-uidleaksfromthetestconnectionsandcorrectbeforecontinuing
thetest.
9.Withtheenginerunning,movethethrottletofullspeed(3,000rpm).
10.Monitorthetesterpressuregaugecarefullywhileyouslowlyclosetheow
controlvalveuntilyouget6,900kPa(1,000psi).Donotclosethetester
loadvalvefully.
11.Checkwithaphototacthattheenginespeedremains3,000rpmwhile
maintaining6,900kPa(1,000psi)onthetesterpressuregauge.
12.Monitortheowgauge.Theowindicationforapumpingoodconditionis
18.9L/minute(5.0gallons/minute).
13.Openthetesterloadvalveandthenshutofftheengine.Recordthetest
results.
14.Anormalpumpowis18.9L/minute(5.0gallons/minute).Alowerpump
owmayresultinreducedcircuitperformance.Iftheowislessthan17.0
L/minute(4.5gallons/minute)orapressureof6,900kPa(1,000psi)
cannotbeobtained,checkforrestrictioninthepumpinletline.Iftheinletline
isnotrestricted,removethegearpumpandrepairorreplaceasnecessary.
Note:Theimplementreliefvalvepressurecanalsobetestedwitha
hydraulictester(pressureandow)inserieswiththegearpumpttingand
disconnectedhose.Usethepressuregaugesonthehydraulictesterand
followTestingtheImplementReliefPressure(UsingPressureGauge)(page
4–48).
15.Releasepressurefromthehydraulicsystem;refertoReleasingPressure
fromtheHydraulicSystem(page4–11).
16.Disconnectthetesterfromtheliftcontrolmanifoldttingandhydraulichose,
andconnectthehosetotheliftcontrolmanifoldttingagain.
Groundsmaster7210
Page4–53
HydraulicSystem:TestingtheHydraulicSystem
16222SLRevC