Toro Air Cool Z Master 74090 - Checking the Wheel Hub Slotted Nut; Adjusting the Caster-Pivot Bearing; Brake Maintenance; Adjusting the Parking Brake

CheckingtheWheelHub
SlottedNut
ServiceInterval:Aftertherst100hours
Every500hoursthereafter
Torquetheslottednutto420to461N∙m(310to340
ft-lb).
Note:DoNotuseanti-seizeonwheelhub.
AdjustingtheCaster-Pivot
Bearing
ServiceInterval:Every500hours/Yearly(whichever
comesrst)
1.Parkthemachineonalevelsurface,disengage
theblade-controlswitch,andengagetheparking
brake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Removethedustcapfromthecasterandtighten
thelocknut(Figure58).
4.Tightenthelocknutuntilthespringwashersare
at,andthenbackoffa1/4turntoproperlyset
thepreloadonthebearings(Figure58).
Important:Makesurethatthespring
washersareinstalledcorrectlyasshownin
Figure58.
5.Installthedustcap(Figure58).
g228558
Figure58
1.Springdiscwashers
BrakeMaintenance
AdjustingtheParking
Brake
ServiceInterval:Aftertherst100hours
Every500hours
Checktoensurethatparkingbrakeisadjusted
properly.Thisproceduremustbefollowedafterthe
rst100hoursorwhenabrakecomponenthasbeen
removedorreplaced.
1.Parkthemachineonalevelsurface,disengage
theblade-controlswitch,andengagetheparking
brake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Raisetherearofthemachineupandsupport
themachinewithjackstands.
4.Removethereartiresfromthemachine.
5.Removeanydebrisfromthebrakearea.
6.Releasethedrivewheels;refertoUsingthe
Drive-Wheel-ReleaseValves(page32).
7.Ensurethatthecaliperistightenedtothe
transmission.
8.Disengagetheparkingbrake.
9.Installtherearlinkagetothebellcrankandpin
usingthespringclevispin(Figure59).
g297209
Figure59
1.Rearlinkage
4.Caliper
2.Jamnut5.Wheelhub
3.Springclevispin
10.Pushthecaliperleverforwardwithnger
pressureonlyenoughtotakeupthecaliper
clearancetothehub(Figure59).
11.Loosenthejamnutontherearlinkage.
12.Adjusttherearlinkagetoaligntheholesand
installthespringclevispin(Figure59).
51