Toro 74939 - Checking the Wheel Lug Nuts; Checking the Wheel Hub Slotted Nut; Adjusting the Caster Pivot Bearing

CheckingtheWheelLugNuts
Checkandtorquethewheellugnutsto90-95ft-lb(122-129
N-m).
CheckingtheWheelHub
SlottedNut
ServiceInterval:Aftertherst100hours
Every500hours
SeeFigure64todeterminewhichslottednuthasbeen
installedontheunit.
Figure64
1.StyleA(blacknish)3.StyleB(yellowzinc)
2..03inch(.76mm)4..24inch(6mm)
•StyleA(blacknish):
Torquetheslottednutto211-260ft-lb(286-352N-m).
Note:DoNotuseanti-seizeonwheelhub.
•StyleB(yellowzinc):
1.Removeanddiscardthecotterpin.
2.Torquetheslottednutto200ft-lb(271N-m).
3.Checkdistancefrombottomofslotinnuttoinside
edgeofhole.Twothreads(0.1inch)orlessshould
beshowing.
Figure65
1.0.1inchmax2.Nomorethantwothreads
(0.1inchmax)shouldbe
showinghere.
4.Ifmorethantwothreads(0.1inch)areshowing
removenutandinstallwasherbetweenhuband
nut.
5.Torquetheslottednutto200ft-lb(271N-m).
6.Thentightennutuntilthenextsetofslotslineup
withthecrossholeinshaft.Donotloosennutto
aligntheslot.Ifrequired,tightentothenextset
ofslots.
7.Installanewcotterpin.
Note:DoNotuseanti-seizeonwheelhub.
AdjustingtheCasterPivot
Bearing
ServiceInterval:Every500hours/Yearly(whichevercomes
rst)
1.Disengagethebladecontrolswitch(PTO),movethe
motioncontrolleverstotheneutrallockedposition
andsettheparkingbrake.
2.Stoptheengine,removethekey,andwaitforallmoving
partstostopbeforeleavingtheoperatingposition.
3.Removethedustcapfromcasterandtightenlocknut
(
Figure66).
4.Tightenthelocknutuntilthespringwashersareatand
thenbackoffa1/4turntoproperlysetthepre-loadon
thebearings(Figure66).
Important:Makesurethespringwashersare
installedcorrectlyasshowninFigure66.
5.Installthedustcap(Figure66).
Figure66
1.SpringWashers3.DustCap
2.Locknut
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