Toro Air Cool Z Master 74090 - Engine Maintenance; Engine Safety; Servicing the Air Cleaner

4.Removethecasterwheelfromthecasterforks.
5.Removethesealguardsfromthewheelhub.
6.Removeaspacernutfromtheaxleassemblyin
thecasterwheel.
Note:Thread-lockingadhesivehasbeen
appliedtolockthespacernutstotheaxle.
7.Removetheaxle(withtheotherspacernutstill
assembledtoit)fromthewheelassembly.
8.Pryoutsealsandinspectbearingsforwearor
damageandreplaceifnecessary.
9.Packthebearingswithageneral-purpose
grease.
10.Insert1bearingand1newsealintothewheel.
Note:Replacetheseals.
11.Iftheaxleassemblyismissingbothspacernuts,
applyathread-lockingadhesiveto1spacernut
andthreaditontotheaxlewiththewrenchats
facingoutward.
Note:Donotthreadthespacernutallof
thewayontotheendoftheaxle.Leave
approximately3mm(1/8inch)fromtheouter
surfaceofthespacernuttotheendoftheaxle
insidethenut.
12.Inserttheassemblednutandaxleintothewheel
onthesideofthewheelwiththenewsealand
bearing.
13.Withtheopenendofthewheelfacingup,ll
theareainsidethewheelaroundtheaxlefullof
general-purposegrease.
14.Insertthesecondbearingandnewsealintothe
wheel.
15.Applyathread-lockingadhesivetothesecond
spacernut,andthreaditontotheaxlewiththe
wrenchatsfacingoutward.
16.Torquethenutto8to9N∙m(75to80in-lb),
loosen,thentorqueto2to3N∙m(20to25in-lb).
Note:Makesurethattheaxledoesnotextend
beyondeithernut.
17.Installthesealguardsoverthewheelhub,and
insertthewheelintothecasterfork.
18.Installthecasterboltandtightenthenutfully.
Important:Topreventsealandbearingdamage,
checkthebearingadjustmentoften.Spinthe
castertire.Thetireshouldnotspinfreely(more
than1or2revolutions)orhaveanysideplay.If
thewheelspinsfreely,adjustthetorqueonthe
spacernutuntilthereisaslightamountofdrag.
Applyanotherlayerofthread-lockingadhesive.
EngineMaintenance
EngineSafety
•Shutofftheenginebeforecheckingtheoilor
addingoiltothecrankcase.
•Keepyourhands,feet,face,clothing,andother
bodypartsawaythemuferandotherhotsurfaces.
ServicingtheAirCleaner
ServiceInterval:Beforeeachuseordaily—Check
theaircleanerfordirty,looseor
damagedparts.
Every250hours—Serviceorreplacethe
air-cleanerfoamelement(moreoftenunder
dusty,dirtyconditions).
Every500hours—Replacetheair-cleaner
paperelement(moreoftenunderdusty,dirty
conditions).
Note:Servicetheaircleanermorefrequentlyif
operatingconditionsareextremelydustyorsandy.
RemovingtheFilters
1.Parkthemachineonalevelsurface,disengage
theblade-controlswitch(PTO),andengagethe
parkingbrake.
2.Shutofftheengine,removethekey,andwait
forallmovingpartstostopbeforeleavingthe
operatingposition.
3.Releasethelatchesontheaircleanerand
pulltheair-inletcoverofftheair-cleanerbody
(Figure40).
4.Cleantheair-inletscreenandcover.
5.Installtheair-inletcoverandsecureitwiththe
latches(Figure40).
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