Service Manual

TestingtheHydraulicSystem
Themosteffectiveproceduretoisolatetheproblemsinthehydraulicsystemisto
usehydraulictestequipment,suchaspressuregaugesandowmetersinthe
circuitsduringdifferentoperationalchecks;refertoSpecialT ools(page2–12).
WARNING
Openingthehydraulicsystemwithoutreleasingpressurefromthe
systemwillcausethehydraulicuidtoescape,causingpossible
injury.
Beforedisconnectingorperforminganyworkonthehydraulic
system,shutofftheengineandpressthemotioncontrolpedalsto
releasethepressureinthesystem.
WARNING
Hydraulicuidescapingunderpressurecanpenetrateskinand
causeinjury.
•Keepyourbodyandhandsawayfrompin-holeleaksornozzles
thatejecthydraulicuidunderhighpressure.
•Donotuseyourhandstosearchforleaks;useapieceofpaper
orcardboard.
•Hydraulicuidescapingunderpressurecanhavesufcientforce
topenetratetheskinandcauseseriousinjury.
•Ifhydraulicuidisinjectedintoyourskin,theuiddamageto
yourbodymustbesurgicallyremovedwithinafewhoursbya
doctorfamiliarwiththisformofinjuryorgangrenemayresult.
CAUTION
Failingtousegaugeshavingtherecommendedpressure(kPa/psi)
ratingcoulddamagethegaugeandcausepersonalinjuryfrom
contactwithhot,leakinghydraulicuid.
Usegaugeswiththerecommendedpressureratingaslistedinthe
testprocedures.
IMPORTANT
Beforeperformingthehydraulictests,checkallobviousareas,such
asuidsupply,lter,bindinglinkages,loosefasteners,orimproper
adjustmentsbeforeyouassumethatahydrauliccomponentisthe
sourceoftheproblem.
HydraulicSystem:TestingtheHydraulicSystem
Page5–20
GreensPro
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1240/1260
14211SLRevA