Toro 74991 Z Master Professional 5000 Series - Fuel System Maintenance

InstallingtheSparkPlug
Tightenthesparkplug(s)to24.4to29.8N∙m(18to22ft-lb).
Figure59
CheckingtheSparkArrester
(ifEquipped)
ServiceInterval:Every50hours
WARNING
Hotexhaustsystemcomponentsmayignite
gasolinevaporsevenafteryoushutofftheengine.
Hotparticlesexhaustedduringengineoperation
mayigniteammablematerials.Firemayresultin
personalinjuryorpropertydamage.
Donotrefuelorruntheengineunlessaspark
arresterisinstalled.
1.Shutofftheengine,waitforallmovingpartstostop,
andremovekey.Engageparkingbrake.
2.Waitforthemufertocool.
3.Ifthereareanybreaksinthescreenorwelds,replace
thearrester.
4.Ifthescreenisplugged,removethearresterand
shakethelooseparticlesoutofthearresterandclean
thescreenwithawirebrush(soakitinsolventif
necessary).Installthearresterontheexhaustoutlet.
FuelSystem
Maintenance
WARNING
Fuel-systemcomponentsareunderhighpressure.
Theuseofimpropercomponentscanresultin
systemfailure,gasolineleakage,andpossible
explosion.
Useonlyapprovedfuellinesandfuellters.
ServicingtheElectronic
Fuel-InjectionSystem
Thismachinecontainsanelectronicfuel-injectionsystem.It
controlsthefuelowunderdifferentoperatingconditions.
Theelectroniccontrolunit(ECU)continuouslymonitorsthe
operationoftheEFIsystem.
Ifaproblemorfaultwithinthesystemisdetected,the
malfunctionindicatorlight(MIL)illuminates.TheMIListhe
redlightlocatedintherightconsolepanel.
OncetheMILilluminates,makeinitialtroubleshooting
checks.RefertotheMILsectionunderTroubleshooting
(page69).
Ifthesechecksdonotcorrecttheproblem,furtherdiagnosis
andservicingbyanAuthorizedServiceDealerisnecessary.
ReplacingtheLow-Pressure
FuelFilter
ServiceInterval:Every200hours/Yearly(whichevercomes
rst)
Thefuellterislocatedneartheengineonthefrontorrear
sideoftheengine.
1.Disengagetheblade-controlswitch(PTO),movethe
motion-controlleverstotheNEUTRAL-LOCKposition,
andsettheparkingbrake.
2.Shutofftheengine,removethekey,andwaitforall
movingpartstostopbeforeleavingtheoperating
position.
3.Waitforthemachinetocooldown.
4.Closethefuel-shutoffvalveundertheseat(Figure60).
42