ServicingtheManifold
g230846
Figure107
1.Manifold3.Checkvalve
2.Counterbalancevalve
4.Plug
1.Ensurethatthemanifoldiscleanedbeforeremovingeitherofthevalves.
IMPORTANT
Usecarewhenhandlingthehydraulicvalve.Slightbendingor
distortionofthestemtubecancausebindingandmalfunction.
2.Usingadeepsocket,removevalvesfrommanifold.Notecorrectlocation
ofO-rings,sealingrings,andback-uprings.Removeanddiscardsealkit
fromvalves.
3.Visuallyinspectthemanifoldportandremovedvalvesfordamagetothe
sealingsurfaces,damagedthreads,andcontamination.
A.Contaminationmaycausevalvetostickorhangup.Contamination
canbecomelodgedinsmallvalveoriîš¿cesorsealareascausingvalve
malfunction.
B.Ifvalvesealingsurfacesappearpittedordamaged,thehydraulicsystem
maybeoverheatingortheremaybewaterinthesystem.
CAUTION
Useeyeprotectionsuchasgoggleswhenusingcompressed
airforcartridgevalvecleaning.
4.Cleanvalvesbysubmergingvalveincleanmineralspiritstoushout
contamination.Particlesasîš¿neastalcumpowdercanaffecttheoperationof
thevalve.Beextremelycarefulnottodamagecartridge.Usecompressed
airforcleaning.
HydraulicSystem:ServiceandRepairs
Page5–134
Groundsmaster
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3280-D/3320
05138SLRevB
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