7-MAINTENANCE
Hydraulichoses,tubes,andttings
WARNING
Hotliquidunderpressure!
Ifleaksaredetectedinthehydraulichoses,tubes,orttingsduringtheinspection,carryoutthe
followingbeforeyouperformanymaintenanceactivities:
1.Stoptheengine.
2.Releasethehydraulicsystempressure.
Failuretocomplycouldresultindeathorseriousinjury.
W1334A
Checkthehydraulicsystemlinesandhosesforpossible
leaks.
Repairallhydraulicoilleakspromptlytoavoidlossof
oilandpossibledamageanddirtentryintothesystem.
Whencheckingforhydraulicleaks,startandoperate
theengineat1200-1500RPM.
Removeandinstallnewhosesimmediately,iftheyare
severelydamagedbyacutorscrape,swollenatthe
ttings,orleaking.
Ifyoureplaceahydraulichoseortube,usethefollowing
procedure.
1.Loosenthettings(1)andremovethehoseortube,
thenremoveanddiscardtheO-ringseal(2).
ImmersethenewO-ringintocleanhydraulicoilbefore
assembly.
2.InstallthenewO-ring(2)intothetting(1)andifnec-
essary,retaininpositionusingPETROLEUMJELLY.As-
semblethenewhoseortubeandtightenthettingn-
ger-tight,whileholdingthetubeorhosetopreventit
fromturning.Thetube’sorhose’sturningcoulddam-
agetheO-ring.
3.Usingtwosuitablewrenches,tightenthettingsto
specication.
NOTICE:Whenreplacingorassemblingapipeorhose,
makesurethatallelementsareperfectlycleanandfree
fromanytraceofdirt.Failuretoensureabsolutecleanli-
nesswillresultinthehose/pipeleakingafterinstallation
orpossibledamagetootherhydraulicsystemcomponents.
LEEN11T0359AA1
Toensurealeak-freejoint,donotover-torqueorunder-
torquethettings.
Whenreplacingahose,itisnecessarytobleedairfrom
thesystem.Forthispurpose,lettheenginerunat
1200–1500RPM,contemporarilyactuatingtheloader
andbackhoeattachmentcontrolsfor15minoruntilair
isbledfromthesystem.
LEEN11T0360AA2
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