Exmark VIKING 408 - Tracking Adjustment; Hydro Pump Spring Tension Setting

Maintenance
Afteradjustingthelefthydrocontrollinkage,
movethespeedcontrollevertothemid-speed
positionandthenbacktotheneutralposition.
Rechecktheleftdrivewheelrotationtoseeif
furtheradjustmentisnecessary-besurethe
speedcontrolleverisintheneutralposition.
Important:Ifinconsistentneutraloccurs,
checktobesurebothspringsareproperly
tightenedonthespeedcontrolleverunder
theconsole–especiallytherearpivot
spring.
Repeataboveadjustmentsifnecessary.
3.Placethespeedcontrolleverinneutral.Adjust
therightsidelinkagebyturningthequicktrack
knobcounterclockwiseuntilthetirebeginsto
rotateforward.Begintoretightentheknob
clockwiseabout1/4turnatatime,stopping
tomovethespeedcontrolforwardandback
toneutral.Recheckthedrivewheelrotation
toseeiffurtheradjustmentisnecessary.
4.Thespringthatkeepstensionontheknob
shouldnormallynotneedadjustment.
However,ifadjustmentisneeded,adjustto
wherelengthofspringisabout1inch(2.5cm)
betweenthewashers.Adjustspringlengthby
turningnutatfrontofspring.
•DriveLeverLinkageAdjustment:
1.Withrearofmachinestillonjackstandsand
enginerunningatfullthrottle,disengage
theparkbrakeandmovethespeedcontrol
levertothemidwayposition.Movethe
respectivedriveleverupwarduntilitreaches
theneutralpositionandengageneutrallock
latches(Figure22).Ifthetirerotatesineither
direction,thelengthofthedriveleverlinkwill
needtobeadjusted.
g006953
Figure22
2.Adjustthelinkagelengthbylooseningthejam
nutsatbothendsofthelinkageandrotating
thelinkageintheballjoints.Lengthenthe
linkageifthetireisturninginreverseand
shortenthelinkageifthetireiscreeping
forward.Tightenthejamnutsatbothends.
Releaseandre-engagetheneutrallocklatch
checkingthatthetirestops.Continuethis
processuntilthetireisatadeadstop.
3.Makethisadjustmentforbothsides.
4.Stopengineandwaitforallmovingparts
tostop.Raiserearofmachine,removejack
stands,andcarefullylowermachinetothe
ground.
TrackingAdjustment
1.Stopengineandwaitforallmovingpartstostop.
2.Checkthedrivetirepressuresandtire
circumferencesasstatedinChecktheTire
PressuressectioninMaintenance.
3.Runtheunitandobservethetrackingonalevel,
smooth,hardsurfacesuchasconcreteorasphalt.
4.Iftheunittrackstoonesideortheother,turnthe
quicktrackknob.Turntheknobrightto“steer”
right,turntheknobleftto“steer”left.
HydroPumpSpringTension
Setting
1.Formediumorheavydutydriveconditionssuch
asoperationwithasulkyonsteepslopes,ahigher
springforcemayberequiredonthehydropump
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