Toro Groundsmaster 4500-D Series - Page 175

ProcedureforSteeringCircuitReliefPressureTest(continued)
stabilizebrieyandthenmaycontinuetoincrease.Thesteeringcircuitrelief
pressureisthegaugereadingwhenpressurestabilizes.
GAUGEREADINGTOBE80to103bar(1150TO1500PSI).
8.Stoptheengine.Recordtestresults.
9.Ifsteeringreliefpressureisincorrect,inspectsteeringreliefvalvelocatedin
thesteeringcontrolvalve(seeSteeringControlValveService(page5–141)).
Ifreliefvalveisoperatingproperlyandiflift/lowerandtractionchargecircuit
problemsalsoexist,thethirdgearpumpsectionshouldbesuspectedof
wearordamage.Ifsteeringwheelcontinuestoturnatendofcylindertravel
(withlowerthannormaleffort),steeringcylinderorsteeringcontrolvalve
maybewornordamaged.
10.Whentestingiscomplete,turnsteeringwheeltoboththerightandtheleft
withtheenginenotrunningtorelievesteeringcircuitpressure.Remove
pressuregaugefromhydraulichoseandsteelcapfromsteeringcylinder
tting.Connecthydraulichosetosteeringcylindertting.
Groundsmaster
®
4500-D/4700-D
Page5–73
HydraulicSystem:Testing
19245SLRevA