Toro 74408 Z334 Z Master - Drive System Maintenance; Checking the Tire Pressure; Adjusting the Caster Pivot Bearing

DriveSystem
Maintenance
CheckingtheTirePressure
ServiceInterval:Every50hoursormonthly,whichever
occursrst.
Checkthepressureatthevalvestemafterevery
50operatinghoursormonthly,whicheveroccursrst
(Figure39).
Maintaintheairpressureinthereartiresat13psi(90
kPa).Uneventirepressurecancauseunevencut.Check
thetireswhentheyarecoldtogetthemostaccurate
pressurereading.
Note:Thefronttiresaresemi-pneumatictiresanddo
notrequireairpressuremaintenance.
Figure39
AdjustingtheCasterPivot
Bearing
ServiceInterval:Every500hours
1.DisengagethePTO,movethemotioncontrollevers
totheneutrallockedpositionandsettheparking
brake.
2.Stoptheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Removethedustcapfromcasterandtightenlock
nut(Figure40).
4.Tightenthelocknutuntilthespringwashersareat
andthenbackoffa1/4turntoproperlysetthe
pre-loadonthebearings(Figure40).
Important:Makesurespringwashersare
installedcorrectlyasshowninFigure40.
5.Installthedustcap(Figure40).
Figure40
1.SpringWashers3.DustCap
2.LockNut
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