Toro Groundsmaster 4500-D Series - Page 276

Disassembly(Figure157)(continued)
IMPORTANT
Preventdamagewhenclampingthecylinderinavise;clamponthe
clevisonly.Donotcloseviseenoughtodistortthebarrel.
2.Mountliftcylindersecurelyinavisebyclampingontheclevisendofthe
barrel.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(Figure157)
1.Makesureallcylindercomponentsarecleanbeforeassembly.
2.Coatnewsealkitcomponentswithcleanhydraulicoil.
A.InstallnewsealsandO-ringstothepiston.
B.Installnewseals,O-ringandback-upsealtothehead.
3.Coatshaftwithcleanhydraulicoil.Carefullyslideheadandpistonontothe
shaft.
IMPORTANT
Donotclampvisejawsagainsttheshaftsurface.Protectshaft
surfacebeforemountinginavise.
4.Mountshaftsecurelyinavisebyclampingontheclevisoftheshaft.Secure
pistontoshaftwithlocknut.
HydraulicSystem:ServiceandRepairs
Page5–174
Groundsmaster
®
4500-D/4700-D
19245SLRevA