Toro 74441 - Checking the Wheel Hub Slotted Nut; Adjusting the Caster Pivot Bearing

Checkthepressureatthevalvestemafterevery
50operatinghoursormonthly,whicheveroccursrst
(Figure44).
Maintaintheairpressureinthereartiresat13psi(90
kPa).Uneventirepressurecancauseanunevencut.
Checkthetireswhentheyarecoldtogetthemost
accuratepressurereading.
Note:Thefronttiresaresemi-pneumatictiresanddo
notrequireairpressuremaintenance.
Figure44
CheckingtheWheelHub
SlottedNut
ServiceInterval:Every500hours
Checkafterevery500operatinghours.
Theslottednutneedstobetorquedto125ft-lb
(170N•m).
1.DisengagethePTO,movethemotioncontrollevers
totheneutrallockedpositionandsettheparking
brake.
2.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Removethecotterpin.
4.Torquetheslottednutto125ft-lb(170N•m)
(Figure45).
Figure45
1.SlottedNut3.Holeinthreadedshaft
2.Twothreadsorless
showing
4.Washer(ifneeded)
5.Checkthedistancefrombottomofslotinnutto
insideedgeofhole.Twothreadsorlessshouldbe
showing(Figure45).
6.Ifmorethantwothreadsareshowingremovenut
andinstallwasherbetweenhubandnut.
7.Torquetheslottednutto125ft-lb.(170N•m)
(Figure45).
8.Tightenthenutuntilthenextsetofslotslineupwith
theholeintheshaft(Figure45).
9.Replacethecotterpin.
AdjustingtheCasterPivot
Bearing
ServiceInterval:Every500hours
Checkafterevery500operatinghoursoratstorage,
whichevercomesrst.
1.DisengagethePTO,movethemotioncontrollevers
totheneutrallockedpositionandsettheparking
brake.
2.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Removethedustcapfromcasterandtightenlock
nut(Figure46).
4.Tightenthelocknutuntilthespringwashersareat
andthenbackoffa1/4turntoproperlysetthe
pre-loadonthebearings(Figure46).
Important:Makesurespringwashersare
installedcorrectlyasshowninFigure46.
5.Installthedustcap(Figure46).
35