Service Manual

TestingtheHydraulicSystem
Themosteffectiveproceduretoisolatetheproblemsinthehydraulicsystemisto
usehydraulictestequipment,suchaspressuregaugesandowmetersinthe
circuitsduringdifferentoperationalchecks;refertoSpecialT ools(page4–42).
IMPORTANT
Beforeperformingthehydraulictests,checkallobviousareas,such
asuidsupply,lter,bindinglinkages,loosefasteners,orimproper
adjustmentsbeforeyouassumethatahydrauliccomponentisthe
sourceoftheproblem.
IMPORTANT
Have2peopleperformallthetesting,with1personintheseatand
theothertoreadandrecordthetestresults.
CAUTION
Failingtousegaugeshavingtherecommendedpressure(kPa/psi)
ratingcoulddamagethegaugeandcausepersonalinjuryfrom
contactwithhot,leakinghydraulicuid.
Usegaugeswiththerecommendedpressureratingaslistedinthe
testprocedures.
WARNING
Hydraulicuidescapingunderpressurecanpenetrateskinand
causeinjury.
•Keepyourbodyandhandsawayfrompin-holeleaksornozzles
thatejecthydraulicuidunderhighpressure.
•Donotuseyourhandstosearchforleaks;useapieceofpaper
orcardboard.
•Hydraulicuidescapingunderpressurecanhavesufcientforce
topenetratetheskinandcauseseriousinjury.
•Ifhydraulicuidisinjectedintoyourskin,theuiddamageto
yourbodymustbesurgicallyremovedwithinafewhoursbya
doctorfamiliarwiththisformofinjuryorgangrenemayresult.
HydraulicSystem:TestingtheHydraulicSystem
Page4–52
Groundsmaster5900TractionUnit
08159SLRevC