Toro 105-1678 User manual

FormNo.3447-231RevA
MuferandSparkArresterKit
ZMaster®SeriesRidingMowers
ModelNo.105-1678
ModelNo.105-1679
ModelNo.105-3633
InstallationInstructions
Important:Whenyounishinstallingthesparkarrester,storetheseInstallationInstructionswithyour
Operator’sManualforfuturereference.
Installation
LooseParts
Usethechartbelowtoverifythatallpartshavebeenshipped.
ProcedureDescriptionQty.Use
1Nopartsrequired–Preparethemachine.
2Nopartsrequired–Removethemufer.
Cableheatshield1
Bolt(1/4x3/4inch)1
3Locknut(1/4inch)1
Installthecableheatshield(forModels
74240and74241).
Mufer1
4Gasket2Installthemufer.
Sparkarrester1
5Self-threadingscrew(#8x1/2inch)2Installthesparkarrester.
1
PreparingtheMachine
NoPartsRequired
Procedure
1.Parkthemachineonalevelsurface.
2.Movethemotion-controlleverstothe
NEUTRAL-LOCKposition.
3.Engagetheparkingbrake.
4.Shutofftheengineandremovethekey.
5.Allowthemachineandenginetocoolcompletely.
2
RemovingtheMufer
NoPartsRequired
Procedure
1.Removethemuferheatshield.
2.Removethe4nutsandlockwasherssecuring
themufertothestudsontheengine.
3.Removetheoldmuferandgasketsfromthe
engineandensurethatyoucleanallthepieces
ofthegasketsofftheengineexhaustmanifold.
©2021—TheToro®Company
8111LyndaleAvenueSouth
Bloomington,MN55420Registeratwww.Toro.com.
OriginalInstructions(EN)
PrintedintheUSA
AllRightsReserved*3447-231*

3
InstallingtheCableHeat
Shield
ForModels74240and74241
Partsneededforthisprocedure:
1Cableheatshield
1Bolt(1/4x3/4inch)
1Locknut(1/4inch)
Procedure
1.Removetheboltbelowthecablebracketthatis
installedtotheengine(Figure1).
2.Installthecableheatshieldbelowthecable
bracketusingtheboltremovedinstep1(Figure
1).
Ensurethatyouinstallthecableheatshield
betweenthemuferandcablebracket.
3.Installthebolt(1/4x3/4inch)inthetopofthe
cablebracketandintothecableheatshield
(Figure1).
4.Securethebolt(1/4x3/4inch)usingthelocknut
(1/4inch)asshowninFigure1.
g006626
Figure1
1.Cableheatshield
(installed)
5.Bolt(1/4x3/4inch)
2.Cablebracket6.Locknut(1/4inch)
3.Cable7.Engine
4.Boltbelowthecable
bracket
2

4
InstallingtheMufer
Partsneededforthisprocedure:
1Mufer
2Gasket
Procedure
1.Slidethe2newgasketsoverthestudsonthe
engine.
2.Installthenewmufertothestudsonthe
engine,securingittightlyusingthepreviously
removedlockwashersandnut(Figure2).
3.Installthemuferheatshield(Figure2).
g006627
Figure2
1.Mufer4.Washer
2.Gaskets5.Cableheatshield
(installed)
3.Nut6.Cable
5
InstallingtheSparkArrester
Partsneededforthisprocedure:
1Sparkarrester
2Self-threadingscrew(#8x1/2inch)
Procedure
WARNING
Hotexhaustsystemcomponentsmayignite
fuelvaporsevenaftershuttingofftheengine.
Hotparticlesexhaustedduringengine
operationmayigniteammablematerials.
Firemayresultinpersonalinjuryorproperty
damage.
Donotrefuelorruntheengineunlessthe
sparkarresterisinstalled.
1.Installthescrewholeendofthesparkarrester
ontheexhaustoutletasfaraspossiblebyhand.
Important:Donotuseahammer;otherwise,
youwilldamagethesparkarrester.
2.Securethesparkarrestertothemuferusing
the2self-threadingscrews(#8x1/2inch)as
showninFigure3.
2
1
g355094
Figure3
1.Sparkarrester2.Self-threadingscrew(#8x
1/2inch)
3

Maintenance
MaintainingtheSpark
Arrester
KeepthisSheetwiththe
Operator’sManualforFuture
Reference
ServiceInterval:Every50hours—Inspectthespark
arresterfordamageorbuild-upon
thescreen.
1.Parkthemachineonalevelsurface.
2.Movethemotion-controlleverstothe
NEUTRAL-LOCKposition.
3.Engagetheparkingbrake.
4.Shutofftheengineandremovethekey.
5.Waitforthemufertocoolcompletely.
6.Ifyouobserveanybreaksinthescreenor
welds,replacethesparkarrester.
7.Ifthescreenisplugged,removethespark
arresterandremovethelooseparticlesfromthe
sparkarresterandcleanthescreenusingawire
brush(soakinsolvent,ifnecessary).
Installthesparkarrestertotheexhaustoutlet.
4