Exmark VIKING 408 - Replace Emissions Air Intake Filter; Thread Locking Adhesives

Maintenance
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Figure8
1.Chargepumpcap2.Loosen11/2turnsonly
1.Stopengineandwaitforallmovingpartstostop.
Raisetherearofthemachineupontojackstands
highenoughtoraisethedrivewheelsoffthe
ground.
2.CheckoillevelasstatedinCheckHydraulicOil
Levelsection.
3.Startengineandmovethrottlecontrolaheadto
fullthrottleposition.Movethespeedcontrol
levertothemiddlespeedpositionandplacethe
driveleversinthe“drive”position.
Ifeitherdrivewheeldoesnotrotate,itispossible
toassistthepurgingofthechargepumpby
carefullyrotatingthetireintheforwardposition.
Note:Itisnecessarytolightlytouchthecharge
pumpcapwithyourhandtocheckthepump
temperature.Ifthecapistoohottotouch,turn
offengine.Thepumpsmaybedamagedifthe
pumpbecomestoohot.
Ifeitherdrivewheelstilldoesnotrotatecontinue
withstep4.
4.Thoroughlycleantheareaaroundeachofthe
chargepumphousings.
5.To“prime”chargepump,loosentwohexsocket
headcapscrews(showninFigure8)11/2turns
only.Makesureengineisnotrunning.Lift
thechargepumphousingupwardandwaitfor
asteadyowofoiltoowoutfromunderthe
housing.Retightenthecapscrews.Dothisfor
bothpumps.
Note:Hydraulicreservoircanbepressurizedup
to5psitospeedthisprocess.
6.Ifeitherdrivewheelstilldoesnotrotate,stop
andrepeatsteps4and5abovefortherespective
pump.Ifwheelsrotateslowly,thesystemmay
primeafteradditionalrunning.Checkoillevel
asstatedinChecktheHydraulicOilLevel
section.
7.Allowunittorunseveralminutesafterthecharge
pumpsare“primed”withdrivesysteminthefull
speedposition.CheckoillevelasstatedinCheck
theHydraulicOilLevelsection.
8.Checkhydrodrivelinkageadjustmentasstatedin
HydroDriveLinkageAdjustmentsectionin
Adjustments.
ReplaceEmissionsAirIntake
Filter
ServiceInterval:Every500hours
1.Stopengine,waitforallmovingpartstostop,and
removekeyorsparkplugwire(s).Engageparking
brake.
2.Removethelterfromtheventhose.
3.Insertanewlterintotheendoftheventhose.
ThreadLockingAdhesives
Threadlockingadhesivessuchas“Loctite242”
or“Fel-Pro,Pro-LockNutType”areusedonthe
followingfasteners:
•Pumpsheavesetscrews.
•Squareheadsetscrewsonhydropumpcontrol
arms.
•OPCleversetscrews.
•Shoulderboltsinendsofspeedcontrolcrank.
•Sheaveretainingboltinendofenginecrankshaft.
•Fueltankbulkheadttingthreads
Adhesivessuchas“LoctiteRC/609orRC/680”or
“Fel-ProPro-LockRetainingIorRetainingII”are
usedonthefollowing:
•OPCleverhubsandcross-shaft.
Note:Caremustbeusednottobondthe
bearing,nexttoeachOPChub,tothecross-shaft
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