Case 621G - Page 347

7-MAINTENANCE
Doorhinges
Usegraphitetolubricateallhinges.DONOTuseoil.
Plasticandresinparts
Whencleaningtheplasticwindows,theconsole,thein-
strumentpanel,theindicators,etc.donotusegasoline,
kerosene,paintsolvents,etc.Onlyusewater,soapand
asoftcloth.
Theuseofgasoline,kerosene,paintsolvents,etc.will
causediscoloration,cracksordeformationofthese
parts.
Checkingforcylinderleakage
Acylinderrodshouldbeslightlyoily.Checkthatthere
arenoleaksafteraperiodofwork,whenthewhole
hydraulicsystemisatnormaloperatingtemperature.
1.Wipetherodandbearingcleanonthecylindertobe
checked.
2.Operatenormallyforveortenminutes.
3.Extendthecylinderrod.
4.Carryouttheleaktest.
RodAppearanceTest
Conclusion
Dry
Slighttracesofoilwhenapieceof
paperiswipedover20cm(7.9in)of
therod.
Normal
Slightlygreasy
Paperremainsstucktorodwhenrun
overrod.
Normal
Oily
Paperremainsstuckwhenplacedon
rod.
Normal
Veryoilyorweeping
Eachtimethecylinderrodis
extended,aringofoilcanbeseen
ontherod.
Leakage
Eachtimetherodretracts,theexcess
oildripsfromthegland.
Seeyourdealer
Fireextinguisher(Optional)
Itisstronglyrecommendedthatareextinguisherbe
keptonthemachine.
Maintenancespecications
Everymonth
Examinethereextinguisherandmakesureitisnotdamaged.
Everyyear
Haveanapprovedspecialistexaminethereextinguisher.
Everysixyear
Haveanapprovedspecialistemptyandrellthereextinguisher.
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