Toro 74991 Z Master Professional 5000 Series - Lubricating the Caster-Wheel Hubs

LubricatingtheCaster-Wheel
Hubs
ServiceInterval:Yearly
1.Shutofftheengine,waitforallmovingpartstostop,
removethekey,andengagetheparkingbrake.
Figure48
1.Sealguard2.Spacernutwithwrench
ats
2.Removethecasterwheelfromthecasterforks.
3.Removethesealguardsfromthewheelhub.
4.Removeaspacernutfromtheaxleassemblyinthe
casterwheel.
Note:Thread-lockingcompoundhasbeenappliedto
lockthespacernutstotheaxle.
5.Removetheaxle(withtheotherspacernutstill
assembledtoit)fromthewheelassembly.
6.Pryoutsealsandinspectbearingsforwearordamage
andreplaceifnecessary.
7.Packthebearingswithageneral-purposegrease.
8.Insert1bearingand1newsealintothewheel.
Note:Replacetheseals.
9.Ifbothspacernutshavebeenremoved(orbroken
loose)fromtheaxleassembly,applyathread-locking
compoundto1spacernutandthreaditontotheaxle
withthewrenchatsfacingoutward.
Note:Donotthreadthespacernutalloftheway
ontotheendoftheaxle.Leaveapproximately3mm
(1/8inch)fromtheoutersurfaceofthespacernutto
theendoftheaxleinsidethenut.
10.Inserttheassemblednutandaxleintothewheelonthe
sidewiththenewsealandbearing.
11.Withtheopenendofthewheelfacingup,llthearea
insidethewheelaroundtheaxlefullofgeneral-purpose
grease.
12.Insertthesecondbearingandnewsealintothewheel.
13.Applyathread-lockingcompoundtothesecondspacer
nutandthreaditontotheaxlewiththewrenchats
facingoutward.
14.Torquethenutto8to9N∙m(75to80in-lb),loosen
thenut,thentorqueitto2to3N∙m(20to25in-lb).
Note:Makesurethattheaxledoesnotextendbeyond
eithernut.
15.Installthesealguardsoverthewheelhubandinsert
wheelintothecasterfork.
16.Installthecasterboltandtightenthenutfully.
Important:Topreventsealandbearingdamage,check
thebearingadjustmentoften.Spinthecastertire.The
tireshouldnotspinfreely(morethan1or2revolutions)
orhaveanysideplay.Ifthewheelspinsfreely,adjustthe
torqueonthespacernutuntilthereisaslightamountof
drag.Applyanotherlayerofthread-lockingcompound.
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