Toro 74312 - Drive System Maintenance; Adjusting the Tracking; Checking the Tire Pressure; Checking the Wheel-Lug Nuts

DriveSystem
Maintenance
AdjustingtheTracking
Note:Thetrackingknobislocatedundertheseat.
Note:Rotatingthisknoballowsnetuning
adjustmentssothatthemachinetracksstraightwith
thedriveleversinthefullforwardposition.
1.Runthemachineat3/4speedforatleast5
minutestobringhydraulicuiduptooperating
temperature.Stopmachineandwaitforall
movingpartstostop.
2.Engagetheparkingbrake.
3.Tilttheseatforwardtogainaccesstothe
trackingknob.
4.Rotatetheknobtowardtherighttosteerright
androtateittowardthelefttosteerleft.
5.Adjustin1/8turnincrementsuntilthemachine
tracksstraight.
6.Checkandensurethatthemachinedoesnot
creepwheninneutralwiththeparkingbrakes
disengaged(Figure42).
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g025157
Figure42
1.Trackingknob
CheckingtheTirePressure
ServiceInterval:Every40hours
Maintaintheairpressureinthereartiresat103kPa
(15psi).Uneventirepressurecancauseunevencut.
Checkthetireswhentheyarecold,togetthemost
accuratepressurereading.
Note:Thefronttiresaresemi-pneumatictiresand
doesnotrequireairpressuremaintenance.
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Figure43
Note:Donotaddanytypeoftirelinerorfoamll
materialtothetires.
CheckingtheWheel-Lug
Nuts
ServiceInterval:Aftertherst100hours
Every500hours
Checkandtorquethewheel-lugnutsto122to129
N∙m(90to95ft-lb).
CheckingtheWheel-Hub
Nuts
ServiceInterval:Aftertherst100hours
Every500hours
Checkandensurethatthetorqueoftheslottednutis
373to475N∙m(275to350ft-lb).
AdjustingtheCaster-Pivot
Bearings
ServiceInterval:Every500hours/Yearly(whichever
comesrst)
1.Movethespeed-controllevertotheNEUTRAL
positiontostopthemachine.
2.DisengagethePTO,engagetheparkingbrake,
shutofftheengine,andwaitforallmovingparts
tostop.
3.Removethedustcapfromthecasterandtighten
thelocknut(Figure44andFigure45).
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