Toro Groundsmaster 4500-D Series - Page 247

Disassembly(Figure135)(continued)
2.Mountsteeringcylindersecurelyinavisebyclampingontheclevisendof
thebarrel.Useofavisewithsoftjawsisrecommended.
3.Loosenheadfrombarrel:
A.Useaspannerwrenchtorotateheadclockwiseuntiltheedgeofthe
retainingringappearsinthebarrelopening.
B.Insertascrewdriverunderthebevelededgeoftheretainingringtostart
theretainingringthroughtheopening.
C.Rotatetheheadcounter-clockwisetoremoveretainingringfrombarrel
andhead.
4.Extractshaftwithheadandpistonbycarefullytwistingandpullingonthe
shaft.
IMPORTANT
Donotclampvisejawsagainsttheshaftsurface.Protectshaft
surfacebeforemountinginavise.
5.Mountshaftsecurelyinavisebyclampingontheclevisoftheshaft.Remove
locknutandpistonfromtheshaft.Slideheadofftheshaft.
6.RemoveanddiscardallsealsandO-ringsfromthepistonandthehead.
7.Washpartsincleansolvent.Drypartswithcompressedair.Donotwipeparts
drywithpapertowelsorcloth.Lintinahydraulicsystemwillcausedamage.
8.Carefullyinspectinternalsurfaceofbarrelfordamage(deepscratches,
out-of-round,etc.).Replaceentirecylinderifbarrelisdamaged.Inspect
pistonrodandpistonforevidenceofexcessivescoring,pittingorwear.
Replaceanydamagedparts.
Assembly(Figure135)
1.Makesureallcylindercomponentsarecleanbeforeassembly.
2.Coatnewsealkitcomponentswithcleanhydraulicoil.
A.InstallnewsealsandO-ringstothepiston.
B.Installnewseals,O-ringandback-upsealtothehead.
IMPORTANT
Donotclampvisejawsagainsttheshaftsurface.Protectshaft
surfacebeforemountinginavise.
3.Mountshaftsecurelyinavisebyclampingontheclevisoftheshaft.
A.Coatshaftwithcleanhydraulicoil.
B.Carefullyslideheadandpistonontotheshaft.Securepistontoshaft
withlocknut.
C.Torquelocknutfrom41to48N·m(30to36ft-lb).
4.Lubricateheadandpistonwithhydraulicoil.Carefullyslideshaftassembly
intocylinderbarrel.
Groundsmaster
®
4500-D/4700-D
Page5–145
HydraulicSystem:ServiceandRepairs
19245SLRevA