Toro 74418 - Adjusting the Caster Pivot Bearing

Checkthepressureatthevalvestemafterevery
50operatinghoursormonthly,whicheveroccursrst
(Figure43).
Maintaintheairpressureinthefrontandreartiresat
13psi(90kPa).Uneventirepressurecancauseuneven
cut.Checkthetireswhentheyarecoldtogetthemost
accuratepressurereading.
Figure43
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)
(Figure44).
Figure44
1.SlottedNut3.Holeinthreadedshaft
2.Twothreadsorless
showing
4.Washer(ifneeded)
5.Checkthedistancefrombottomofslotinnutto
insideedgeofhole.Twothreadsorlessshouldbe
showing(Figure44).
6.Ifmorethantwothreadsareshowingremovenut
andinstallwasherbetweenhubandnut.
7.Torquetheslottednutto125ft-lb.(170N•m)
(Figure44).
8.Tightenthenutuntilthenextsetofslotslineupwith
theholeintheshaft(Figure44).
9.Replacethecotterpin.
AdjustingtheCasterPivot
Bearing
ServiceInterval:Every500hours
Checkafterevery500operatinghoursoratstorage,
whichevercomesrst.
1.DisengagethePTO,movethemotioncontrollevers
totheneutrallockedpositionandsettheparking
brake.
2.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Removethedustcapfromcasterandtightenlock
nut(Figure45).
4.Tightenthelocknutuntilthespringwashersareat
andthenbackoffa1/4turntoproperlysetthe
pre-loadonthebearings(Figure45).
Important:Makesurespringwashersare
installedcorrectlyasshowninFigure45.
5.Installthedustcap(Figure45).
36