Exmark NAVIGATOR User Manual

Maintenance
Deckshownforreferenceonly.Seeattachment
manualforlubricationschedule.
3.Lubricatecasterpivotsonceayear.Removehex
plugandcap.Threadgreasezerkinholeand
pumpwithgreaseuntilitoozesoutaroundtop
bearing.Removegreasezerkandthreadplugback
in.Placecapbackon.
LubricateRearCasterWheel
Hubs
ServiceInterval:Yearly
1.Stopengine,waitforallmovingpartstostop,and
removekey.Engageparkingbrake.
Figure21
1.Sealguard2.Spacernutwithwrench
ats
2.Removecasterwheelfromcasterforks.
3.Removesealguardsfromthewheelhub.
4.Removeoneofthespacernutsfromtheaxle
assemblyinthecasterwheel.Notethatthread
lockingadhesivehasbeenappliedtolockthe
spacernutstotheaxle.Removetheaxle(withthe
otherspacernutstillassembledtoit)fromthe
wheelassembly.
5.Pryoutseals,andinspectbearingsforwearor
damageandreplaceifnecessary.
6.PackthebearingswithaNLGIgrade#1
multi-purposegrease.
7.Insertonebearing,onenewsealintothewheel.
Note:Seals(ExmarkPN103-0063)mustbe
replaced.
8.Iftheaxleassemblyhashadbothspacernuts
removed(orbrokenloose),applyathreadlocking
adhesivetoonespacernutandthreadontothe
axlewiththewrenchatsfacingoutward.Do
Notthreadspacernutallofthewayontotheend
oftheaxle.Leaveapproximately1/8inch(3mm)
fromtheoutersurfaceofthespacernuttothe
endoftheaxleinsidethenut.
9.Inserttheassemblednutandaxleintothewheel
onthesideofthewheelwiththenewsealand
bearing.
10.Withtheopenendofthewheelfacingup,ll
theareainsidethewheelaroundtheaxlefullof
NLGIgrade#1multi-purposegrease.
11.Insertthesecondbearingandnewsealintothe
wheel.
12.Applyathreadlockingadhesivetothe2ndspacer
nutandthreadontotheaxlewiththewrenchats
facingoutward.
13.Torquethenutto75-80in-lb(8-9N-m),loosen,
thenre-torqueto20-25in-lb(2-3N-m).Make
sureaxledoesnotextendbeyondeithernut.
14.Reinstallthesealguardsoverthewheelhuband
insertwheelintocasterfork.Reinstallcasterbolt
andtightennutfully.
Important:Topreventsealandbearingdamage,
checkthebearingadjustmentoften.Spinthe
castertire.Thetireshouldnotspinfreely
(morethan1or2revolutions)orhaveanyside
play.Ifthewheelspinsfreely,adjusttorqueon
spacernutuntilthereisaslightamountofdrag.
Reapplythreadlockingadhesive.
37

Exmark NAVIGATOR Specifications

General

Drive System	Hydrostatic
Deck Construction	Fabricated
Transmission	Hydrostatic
Deck Material	Steel
Turning Radius	Zero-turn
Cutting Width	42 in
Blade Tip Speed	18, 500 fpm
Engine Type	V-Twin