Case 621G - Releasing Pressure in the Hydraulic System

7-MAINTENANCE
Releasingpressureinthehydraulicsystem
WARNING
Pressurizedhydraulicuidcanpenetratetheskinandcausesevereinjuries.
Hydraulicuidisunderextremepressure.Restthebucketorattachmentontheground.Shutthe
engineoff,turnthekeyon,andmovethehydrauliccontrolleverthroughallmovementsseveraltimes
torelieveresidualpressureinthesystem.
Failuretocomplycouldresultindeathorseriousinjury.
W0161A
WARNING
Escapinguid!
Hydraulicuidordieselfuelleakingunderpressurecanpenetratetheskinandcauseinfectionor
otherinjury.Topreventpersonalinjury:Relieveallpressurebeforedisconnectinguidlinesorper-
formingworkonthehydraulicsystem.Beforeapplyingpressure,makesureallconnectionsaretight
andallcomponentsareingoodcondition.Neveruseyourhandtocheckforsuspectedleaksunder
pressure.Useapieceofcardboardorwoodforthispurpose.Ifinjuredbyleakinguid,seeyour
doctorimmediately.
Failuretocomplycouldresultindeathorseriousinjury.
W0178A
WARNING
Escapinguid!
Donotdisconnecthydraulicquickcouplerunderpressurizedconditions.Makesureallhydraulic
pressureisremovedfromthesystembeforedisconnectinghydraulicquickcoupler.
Failuretocomplycouldresultindeathorseriousinjury.
W0095A
WARNING
Burnhazard!
Beforeperforminganyserviceonthehydraulicsystem,youmustallowittocool.Hydraulicuid
temperatureshouldnotexceed40°C(104°F).
Failuretocomplycouldresultindeathorseriousinjury.
W0241A
1.Parkthemachineonrm,levelground,lowerthe
bucket/attachmenttothegroundandstoptheengine.
2.Keepallnon-authorizedpersonnelclearofthema-
chine.Turntheignitionswitchkeytothe“ON”posi-
tion.
LEIL16WHL1286AA1
7-3