Exmark VIKING 408 - PTO Safety Switch Adjustment; Engine to Mower Deck Belt Adjustment

Maintenance
1.Stopengineandwaitforallmovingpartstostop.
Engageparkingbrake.Removekeyorsparkplug
wire(s).
2.WithPTOengaged(leverpulledup,adjustthe
linkagelengthtowherethelowerendofthe
bellcrankjustclearstheaxlesupportgusset(see
Figure12).Makesuretheassistarmisagainstthe
rearassistarmstoponthedeck(seeFigure13).
Pushtheleverdowntothedisengagedposition.
Theassistarmshouldcontactthefrontassistarm
stoponthedeck.Ifitdoesnotcontact,readjust
sothatthebellcrankisclosertothegusset.
g006960
Figure12
1.ThebellcrankjustclearsthegussetwiththePTO
engaged
2.PTOSafetySwitch(locatedbeneaththeenginedeck)
3.Bellcrank
PTOSafetySwitch
Adjustment
1.Stopengineandwaitforallmovingpartstostop.
Engageparkingbrake.Removekeyorsparkplug
wire(s).
2.WithPTOdisengagedandassistarmagainstthe
frontassistarmstop,adjustthebladesafetyswitch
mountingbracket(ifneeded)untilthebellcrank
depressestheplungerby1/4inch(.64cm).
3.BesurethebellcrankDoesNottouchtheswitch
bodyordamagetotheswitchcouldoccur.
4.Retightenswitchmountingbracket.
EnginetoMowerDeckBelt
Adjustment
1.Stopengineandwaitforallmovingpartstostop.
Engageparkingbrake.Removekeyorsparkplug
wire(s).
2.EngagePTO.
3.Checkbeltguidesunderrearengineandfront
mowerdecktoseethattheyareproperlyset(see
BeltGuideAdjustmentsectionforinstructions).
4.Beltmustbetightenoughsoitdoesnotslipduring
heavyloadswhilecuttinggrass.Over-tensioning
willreducebeltandspindlebearinglife.Toadjust
belttension,loosenthe5/16inchwhizlocknut
onturnbuckleandrotatetheturnbuckle;rotate
turnbuckletowardrearofmowertotighten,and
towardfrontofmowertoloosenbelttension(see
Figure13).
For48inchDecks:Ifthereisnoadjustmentleft
intheturnbuckleandthebeltisstillloose,therear
idlerpulleycanberepositionedinthefronthole
(seeFigure13).Thebeltguidelocatednexttothe
pulleymustalsoberepositionedinthefronthole
whenthepulleyismoved.Theturnbucklewill
needtobereadjusted.
Checkbelttensionafterthersthourofoperation
andatleasttwiceduringtherst24hoursof
operation.Adjustasnecessary.
Note:Afterreadjustingthebelttensioncheckthe
beltguideadjustmentasstatedintheBeltGuide
AdjustmentandBladeBrakeAdjustment
sections.
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