Toro 74939 - Checking the Spark Arrester (if Equipped); Fuel System Maintenance; Servicing the Electronic Fuel Injection System; Replacing the Low Pressure Fuel Filter

CheckingtheSparkArrester
(ifequipped)
ServiceInterval:Every50hours
WARNING
Hotexhaustsystemcomponentsmayignite
gasolinevaporsevenaftertheengineisstopped.
Hotparticlesexhaustedduringengineoperation
mayigniteammablematerials.Firemayresultin
personalinjuryorpropertydamage.
Donotrefuelorrunengineunlesssparkarrester
isinstalled.
1.Stoptheengine,waitforallmovingpartstostop,
removethekey,andengagetheparkingbrake.
2.Waitforthemufertocool.
3.Ifthereareanybreaksinthescreenorwelds,replace
thearrester.
4.Ifthescreenisplugged,removethearresterandshake
loosetheparticlesoutofthearrester.
5.Cleanthescreenwithawirebrush(soakinsolventif
necessary).Installthearresterontheexhaustoutlet.
FuelSystem
Maintenance
WARNING
Fuelsystemcomponentsareunderhighpressure.
Theuseofimpropercomponentscanresultin
systemfailure,gasolineleakageandpossible
explosion.
Useonlyapprovedfuellinesandfuellters.
ServicingtheElectronicFuel
InjectionSystem
Thismachinecontainsanelectronicfuelinjectionsystem.It
controlsthefuelowunderdifferentoperatingconditions.
Theelectroniccontrolunit(ECU)continuouslymonitorsthe
operationoftheEFIsystem.
Ifaproblemorfaultwithinthesystemisdetected,the
malfunctionindicatorlight(MIL)isilluminated.TheMILis
theredlightlocatedintherightconsolepanel.
OncetheMILilluminates,initialtroubleshooting
checksshouldbemade.RefertotheMILsectionunder
Troubleshooting(page63).
Ifthesechecksdonotcorrecttheproblem,furtherdiagnosis
andservicingbyanAuthorizedServiceDealerisnecessary.
ReplacingtheLowPressure
FuelFilter
ServiceInterval:Every200hours/Yearly(whichevercomes
rst)(moreoftenindirtyordusty
conditions).
Thefuellterislocatedneartheengineonthefrontorrear
sideoftheengine.
1.DisengagethePTO,movethemotioncontrolleversto
theneutrallockedposition,andsettheparkingbrake.
2.Stoptheengine,removethekey,andwaitforallmoving
partstostopbeforeleavingtheoperatingposition.
3.Allowthemachinetocooldown.
4.Stoptheengine,removethekey,andwaitforallmoving
partstostopbeforeleavingtheoperatingposition.
5.Closethefuelshutoffvalveundertheseat(
Figure57).
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