Toro 74990 - Checking the Wheel Lug Nuts; Checking the Wheel Hub Slotted Nut; Adjusting the Caster-Pivot Bearing; Using the Clutch Shim

CheckingtheWheelLug
Nuts
Checkandtorquethewheellugnutsto122to129
N-m(90to95ft-lb).
CheckingtheWheelHub
SlottedNut
ServiceInterval:Aftertherst100hours
Every500hours
Checkandensurethatthetorqueoftheslottednutis
286to352N-m(211to260ft-lb).
Note:Donotuseanti-seizeonwheelhub.
g029648
Figure66
1.Slottednut
AdjustingtheCaster-Pivot
Bearing
ServiceInterval:Every500hours/Yearly(whichever
comesrst)
1.Disengagetheblade-controlswitch(PTO),move
themotion-controlleverstotheneutral-locked
positionandsettheparkingbrake.
2.Stoptheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Removethedustcapfromcasterandtighten
locknut(Figure67).
4.Tightenthelocknutuntilthespringwashersare
atandthenbackoffa1/4turntoproperlyset
thepre-loadonthebearings(Figure67).
Important:Makesurethespringwashers
areinstalledcorrectlyasshowninFigure67.
5.Installthedustcap(Figure67).
g001297
Figure67
1.SpringWashers
3.DustCap
2.LockNut
UsingtheClutchShim
Somelatermodelyearunitshavebeenbuiltwith
clutchesthatcontainabrakeshim.Whentheclutch
brakehasworntothepointwheretheclutchnolonger
engagesconsistently,theshimcanberemovedto
extendtheclutchlife.
g010869
Figure68
1.Armature5.Brakespacer
2.Fieldshell6.Re-gapshim
3.Rotor7.Brakepole
4.Brakemountingbolt
51