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Safety • Assembly • Operation • Tips &Techniques • Maintenance • Troubleshooting • Parts Lists • Warranty
OF A O AL
21" Rear & Side Discharge
MulchingLawnMower
Model Series 430
iMPORTANT
READ SAFETY RULES AND iNSTRUCTiONS CAREFULLY BEFORE OPERATION
Warning: Thisunitisequippedwithaninternalcombustionengineandshouldnotbeusedon or nearanyunimprovedforest-covered,brush-
coveredor grass-coveredlandunlesstheengine'sexhaustsystemisequippedwitha sparkarrestermeetingapplicablelocalor statelaws(if any).
If a sparkarresterisused,it shouldbemaintainedineffectiveworkingorderbytheoperator.IntheStateofCaliforniatheaboveisrequiredbylaw
(Section4442oftheCaliforniaPublicResourcesCode).Otherstatesmayhavesimilarlaws.Federallawsapplyonfederallands.A sparkarrester
forthemufflerisavailablethroughyournearestengineauthorizedservicedealeror contacttheservicedepartment,RO.Box361131Cleveland,
Ohio44136-0019.
FORMNO.769-01638B
PRINTEDIN U.S.A MTD LLC, P.O. BOX 361131 CLEVELAND, OHiO 44136-0019 3/2/2006
This Operator's Manual is an important part of your new lawn mower, it will help you assemble,
prepare and maintain the unit for best performance. Please read and understand what it says.
Table of
Slope Gauge ....................................................... 3
Safe Operation Practices ................................... 4
Setup and Adjustment ....................................... 6
Operating Your Lawn Mower .............................. 8
Contents
Maintaining Your Lawn Mower ......................... 10
Troubleshooting ................................................ 12
Safety Labels .................................................... 13
Parts List ........................................................... 14
Finding and Recording Model Number
BEFOREASSEMBLINGYOUR NEW EQUIPMENT,please
locatethe model plateon the equipmentandcopy the infor-
mationto thesample modelplate providedto theright.You
can locatethe modelplate by standingatthe operatingposi-
tion and lookingdown atthe rear ofthe deck. This information
will be necessaryto usethe manufacturer'swebsite, to obtain
assistancefromthe CustomerSupport Department,or when
contactingan authorizedservice dealer.
Model Number
Serial Number
P. O. BOX ;361131
CLEVELAND,OH44136
www.yardman.com 330-220-4683
800-800-731 0
Customer Support
Please do NOTreturn the unit to the retailer from which it was
purchased, without first contacting Customer Support.
Ifyou havedifficultyassemblingthis productor haveany questionsregardingthe controls, operation,or maintenanceof this
unit,youcan seek helpfrom the experts. Choosefromthe optionsbelow:
1. Visitwww.yardman.com
2. Call a Customer Support Representative at
1-800-800-7310.
3. The engine manufacturer isresponsiblefor all engine-
relatedissueswithregards to performance,power-rating,
specifications,warranty andservice. Pleasereferto the
engine manufacturer'sOwner's/Operator'sManual, packed
separatelywith your unit,for more information.
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Sightandholdthis levelwith a verticaltree...
also
I
15°
WARNING
Thissymbolpoints
out importantsafety
instructionswhich,if
notfollowed,could
endangerthe personal
i safetyand/or property
I ofyourselfand others.
Readandfollowall
instructionsinthis
manualbeforeat-
temptingto operate
i this machine.Failure
I to complywiththese
instructionsmay result
i inpersonalinjury.When
youseethis symbol.
i HEED ITS WARNING!
Your Responsibility
Restrictthe use
ofthis powermachine
to personswho read,
_understand
ano followthe warnings
and instructions
inthis manual
and on the machine.
WARNING: EngineExhaust,some of itsconstituents,andcertain vehiclecompo-
nentscontain or emit chemicals knownto Stateof Californiato cause cancer and
birth defectsor other reproductiveharm.
DANGER: Thismachinewas builtto beoperatedaccordingto the rulesfor safe operationin this
manual.As with anytype of powerequipment,carelessnessor erroronthe part ofthe operatorcan
result inseriousinjury.This machine iscapable of amputatinghands andfeet andthrowingobjects.
Failureto observethe followingsafety instructionscould resultin serious injuryor death.
Children
Tragicaccidentscanoccurifoperatorisnotalertto presence
ofchildren.Childrenareoftenattractedtomowerand mowing
activity.Theydonot understandthedangers.Neverassume
thatchildrenwill remainwhereyoulastsawthem.
1. Keepchildrenoutofthe mowingareaandunderwatchful
careofa responsibleadultotherthanthe operator.
2. Bealertandturnmoweroffif achildentersthearea.
3. Beforeandwhilemovingbackwards,lookbehindanddown
forsmallchildren.
4. Useextremecarewhenapproachingblindcorners,
doorways,shrubs,trees,orotherobjectsthatmayobscure
yourvisionofachildwhomayrunintothe mower.
5. Keepchildrenawayfromhotor runningengines.Theycan
sufferburnsfroma hotmuffler.
6. Neverallowchildrenunder14yearsoldto operateapower
mower.Children14yearsoldandovershouldreadand
understandoperationinstructionsandsafetyrulesinthis
manualandshouldbetrainedandsupervisedbyaparent.
General Operation
1. Readthisoperator'smanualcarefullyin its entiretybefore
attemptingtoassemblethismachine.Read,understand,
andfollowall instructionsonthe machineandin the
manual(s)beforeoperation.Becompletelyfamiliarwith
thecontrolsandthe properuseofthis machinebefore
operatingit. Keepthis manualin asafeplaceforfuture
andregularreferenceand for orderingreplacementparts.
2. Thismachineisaprecisionpieceof powerequipment,
nota plaything.Therefore,exerciseextremecautionat all
times.Yourunithas beendesignedto performonejob: to
mowgrass.Donotuseit foranyotherpurpose.
3. Neverallow childrenunder14yearsoldto operatethis
machine.Children14yearsoldand overshouldreadand
understandthe instructionsinthismanualandshould
betrainedand supervisedbya parent.Onlyresponsible
individualswhoarefamiliarwiththeserulesofsafe
operationshouldbeallowedto usethismachine.
4. Thoroughlyinspectthe areawherethe equipmentisto
beused.Removeall stones,sticks,wire,bones,toys
andotherforeignobjects,whichcouldbetrippedoveror
pickedupandthrownbythe blade.Thrownobjectscan
causeseriouspersonalinjury.Planyourmowingpattern
toavoiddischargeofmaterialtowardroads,sidewalks,
bystandersandthe like.Also,avoiddischargingmaterial
againsta wallor obstruction,whichmaycausedischarged
materialto ricochetbacktowardthe operator.
5. Tohelpavoidbladecontactora thrownobjectinjury,
stayinoperatorzonebehindhandlesand keepchildren,
bystanders,helpersandpetsatleast75feetfrom mower
whileit is inoperation.Stopmachineifanyoneenters
area.
6. Alwayswearsafetyglassesor safetygogglesduringopera-
tionandwhile performinganadjustmentorrepairtoprotect
youreyes.Thrownobjectswhichricochetcancauseserious
injurytothe eyes.
7. Wearsturdy,rough-soledworkshoesand close-fitting
slacksandshirts. Shirtsand pantsthatcoverthe armsand
legsandsteel-toedshoesarerecommended.Neveroperate
thismachineinbarefeet,sandals,slipperyor light-weight
(e.g.canvas)shoes.
8. Donotputhandsorfeet nearrotatingpartsorundercutting
deck.Contactwithbladecanamputatehandsandfeet.
9. Amissingor damageddischargecovercancauseblade
contactor thrownobjectinjuries.
10.Manyinjuriesoccuras a resultofthe mowerbeingpulled
overthefoot duringa fall causedbyslippingor tripping.
Do notholdontothe mowerifyouarefalling;releasethe
handleimmediately.
11.Neverpullthe mowerbacktowardyouwhileyouare
walking.Ifyoumust backthe mowerawayfromawallor
obstructionfirstlookdownand behindtoavoidtrippingand
thenfollowthesesteps:
a. Stepbackfrommowertofully extendyourarms.
b. Besureyouarewellbalancedwithsurefooting.
c. Pullthe mowerbackslowly,no morethanhalfway
towardyou.
d. Repeatthesestepsas needed.
12.Do notoperatethe mowerwhileunderthe influenceof
alcoholordrugs.
13.Do notengagetheself-propelledmechanismon unitsso
equippedwhilestartingengine.
14.Thebladecontrolhandleisasafetydevice.Neverattempt
tobypassitsoperation.Doingso makesthe safetydevice
inoperativeandmayresultinpersonalinjurythrough
contactwiththe rotatingblade.Thebladecontrolhandle
mustoperateeasilyin bothdirectionsandautomatically
returntothe disengagedpositionwhenreleased.
15.Neveroperatethe mowerinwet grass.Alwaysbesureof
yourfooting. Aslipand fall cancauseseriouspersonal
injury.If youfeelyouarelosingyourfooting,releasethe
bladecontrolhandleimmediatelyandthe bladewillstop
rotatingwithinthreeseconds.
16.Mowonlyin daylightor goodartificiallight.Walk,neverrun.
17.Stopthe bladewhencrossinggraveldrives,walksor roads.
18.If theequipmentshouldstartto vibrateabnormally,stopthe
engineandcheckimmediatelyfor the cause.Vibrationis
generallya warningoftrouble.
4
19.Shuttheengineoff andwait untilthe bladecomesto a
completestopbeforeremovingthe grasscatcheror unclog-
ging thechute.
The cuttingbladecontinuesto rotatefor a fewsecondsafter
the engineisshutoff. Neverplaceany partofthe bodyin
the bladearea untilyouaresurethe bladehasstopped
rotating.
20. Neveroperatemowerwithoutpropertrail shield,discharge
cover,grasscatcher,bladecontrolhandleor othersafety
protectivedevicesin placeandworking.Neveroperate
mowerwithdamagedsafetydevices.Failuretodo socan
resultin personalinjury.
21. Mufflerandenginebecomehotandcan causeaburn.Do
nottouch.
22.Only usepartsand accessoriesmadeforthismachineby
manufacturer.Failuretodo socanresultinpersonalinjury.
23. Ifsituationsoccurwhicharenotcoveredin thismanual,
usecareand goodjudgment.Contactyourdealerfor
assistance.Telephone1-800-800-7310forthe nameofyour
nearestdealer.
Slope Operation
Slopesareamajorfactorrelatedto slipandfallaccidents,which
can resultinsevereinjury.Operationonslopesrequiresextra
caution.Ifyoufeeluneasyon aslope,do notmowit.Foryour
safety,usetheslopegaugeincludedaspartofthis manualto
measureslopesbeforeoperatingthisunitona slopedor hilly
area.Iftheslopeisgreaterthan15degrees,donot mowit.
Do:
1. Mowacrossthefaceofslopes;neverupanddown.Exercise
extremecautionwhenchangingdirectiononslopes.
2. Watchfor holes,ruts,rocks, hiddenobjects,or bumpswhich
can causeyouto slipor trip. Tallgrasscanhideobstacles.
3. Alwaysbesureofyourfooting.A slip andfall cancause
seriouspersonalinjury.Ifyoufeelyouarelosingyour
balance,releasethe bladecontrolhandleimmediately,and
the bladewill stoprotatingwithin3 seconds.
Do Not:
1. Donot mowneardrop-offs,ditchesorembankments,you
could loseyourfootingorbalance.
2. Donot mowslopesgreaterthan 15degreesasshownon
the slopegauge.
3. Donot mowon wetgrass.Unstablefootingcouldcause
slipping.
Service
Safe HandlingOf Gasoline:
1. To avoidpersonalinjury orpropertydamageuseextreme
care inhandlinggasoline.Gasolineisextremelyflammable
andthevaporsareexplosive.Seriouspersonalinjurycan
occurwhengasolineisspilledonyourselforyourclothes,
whichcanignite.
2. Washyourskinandchangeclothesimmediately.
3. Useonlyanapprovedgasolinecontainer.
4. Neverfillcontainersinsideavehicleoron atruckor trailer
bedwitha plasticliner.Alwaysplacecontainersonthe
groundawayfromyourvehiclebeforefilling.
5. Removegas-poweredequipmentfromthe truckortrailer
andrefuelit onthe ground.Ifthisis notpossible,thenrefuel
suchequipmentonatrailerwitha portablecontainer,rather
thanfroma gasolinedispensernozzle.
6. Keepthe nozzlein contactwiththe rimofthefueltank or
containeropeningat alltimesuntilfuelingis complete.Do
notuseanozzlelock-opendevice.
7. Extinguishallcigarettes,cigars,pipesand othersources
ofignition.
8. Neverfuel machineindoorbecauseflammablevaporswill
accumulatein thearea.
9. Neverremovegascap oraddfuelwhileengineishot or
running. Allowengineto coolatleasttwo minutesbefore
refueling.
10.Neveroverfillfueltank. Filltankto nomorethanY2inch
belowbottomoffiller neckto provideforfuelexpansion.
11.Replacegasolinecapandtightensecurely.
12.If gasolineis spilled,wipeitoff theengineand equipment.
Moveunittoanotherarea.Wait5 minutesbeforestarting
engine.
13.Neverstorethe machineorfuel containernearanopen
flame,sparkor pilotlightasona waterheater,space
heater,furnace,clothesdryeror othergasappliances.
14.Toreducefire hazard,keepmowerfreeofgrass,leaves,
orother debrisbuild-up.Cleanupoil orfuelspillageand
removeanyfuel soakeddebris.
15.Allowamowertocoolat least5 minutesbeforestoring.
GeneralService:
1. Neverrunanengineindoorsorin a poorlyventilatedarea.
Engineexhaustcontainscarbonmonoxide,anodorlessand
deadlygas.
2. Beforecleaning,repairing,or inspecting,makecertainthe
bladeandall movingpartshavestopped.Disconnectthe
sparkplugwireandgroundagainstthe engineto prevent
unintendedstarting.
3. Checkthe bladeandenginemountingboltsatfrequent
intervalsfor propertightness.Also,visuallyinspectbladefor
damage(e.g.,bent,cracked,worn)Replacebladewiththe
originalequipmentmanufacture's(O.E.M.)bladeonly,listed
inthismanual."Useof partswhichdo notmeetthe original
equipmentspecificationsmayleadto improperperformance
andcompromisesafety!"
4. Mowerbladesaresharpandcancut.Wrapthebladeor wear
gloves,anduseextracautionwhenservicingthem.
5. Keepallnuts,bolts,andscrewstightto besurethe equip-
mentis insafeworkingcondition.
6. Nevertamperwithsafetydevices.Checktheirproperopera-
tionregularly.
7. Afterstrikinga foreignobject,stopthe engine,discon-
nectthesparkplugwireandgroundagainsttheengine.
Thoroughlyinspectthe mowerfor anydamage.Repairthe
damagebeforestartingandoperatingthe mower.
8. Neverattemptto makea wheelor cuttingheightadjustment
whiletheengineis running.
9. Grasscatchercomponents,dischargecover,andtrail
shieldaresubjecttowearanddamagewhichcould expose
movingpartsor allowobjectsto bethrown.Forsafety
protection,frequentlycheckcomponentsandreplaceim-
mediatelywithoriginalequipmentmanufacturer's(O.E.M.)
partsonly,listedinthis manual."Useofpartswhich do
notmeetthe originalequipmentspecificationsmayleadto
improperperformanceandcompromisesafety!"
10.Do notchangetheenginegovernorsettingor over-revthe
engine.Thegovernorcontrolsthe maximumsafeoperating
speedoftheengine.
11.Maintainor replacesafetylabels,asnecessary.
12.Observeproperdisposallawsand regulations.Improper
disposaloffluidsand materialscanharmtheenvironment.
5
Operation
WARNING
Thissymbol points
out importantsafety
instructions,which if
notfollowed,could
endangerthe personal
safety and/or property
of yourselfand others.
Readand followall
instructions inthis man-
ual beforeattemptingto
operatethis machine.
Failureto comply with
these instructionsmay
result inpersonalinjury.
Whenyou seethis
symbol.
HEED IT'S WARNING!
YourResponsibility
Restrictthe use
of this powermachine
to personswho read.
understand
and followthe warnings
and instructions
in this manua
and onthe machine.
Standbehindthe mower
asifyou weregoingto
operateit. Yourright hand
i correspondsto the right
sideofthe mower;your
lefthandcorrespondsto
the leftsideof the mower.
Makesureto routecable
outsidethe lowerhandle.
Donot crimpcablewhile
liftingthe handleup.
i I[vlPORTANT
i Thisunit isshippedwith-
out gasoline oroilinthe
engine.Fillup gasoline
and oUas instructedin
the accompanying engine
manualBEFOREoperat-
ingyour mower.
Figure3-1: Unfoldhandleandtightenhardware.
WingNuts(2)
Figure3-2:Securelowerhandleto mountingbrackets.
ThisOperatorsManualcoversa rangeofproduct
specificationsforvariousmodels.Characteristicsandfea-
turesdiscussedand/orillustratedinthis manualmaynot
beapplicabletoall models.MTDLLCreservesthe right
tochangeproductspecifications,designs,andequipment
withoutnoticeandwithoutincurringobligation.
1. Removeanypackingmaterialwhichmaybebetween
upperandlowerhandles.
a. Pullupand backon upperhandleasshownin
Figure3-1.Makecertainthelowerhandleisseated
securelyintothehandlemountingbrackets.
b. Tightenstarknobssecuringupperhandleto lower
handle,Figure3-1.Makesurethateachcarriage
boltisseatedproperlyin thehandle.
2. Locatethehairpinclipon theweldpinon eachside
lowerhandle.
a.
Removehairpinclipfromthis hole.Usinga pair
ofpliers,inserthairpinclipintothe holeon pin
closesttothebracket,Figure3-2.Repeaton other
side.
.
b. Inserta carriageboltfromthehardwarepackinto
theupperholeonthehandlemountingbracket,
Figure3-2.Securewithone plasticwingnut,also
includedthehardwarepack.Repeaton otherside.
Theropeguideisattachedtotherightsideofthe
upperhandle.Loosenthewingnutwhichsecuresthe
ropeguide,Figure3-3.
a. Holdbladecontrolhandleagainstupperhandle.
b. Pullstarterropeoutoftheengine.Releaseblade
controlhandle.
.
c. Slipstarterropeintoropeguide.
d. Tightenwingnut.
Insertpostoncabletiesintoholesprovidedon the
lowerhandle.Pullcabletietightandtrimexcess,
Figure3-4.
\,\
Figure3-3:Pullrecoilstarterthroughropeguideandtighten.
f
J
Figure3-4:Securecabletohandleusingcableties.
J
6
Followstepsbelowtoassemblethegrasscatcher
(if needed).Makecertainbagisturnedrightside
outbeforeassembling(warninglabelwill beonthe
outside).
a. Placebagoverframesothat itsblackplasticside
is atthebottom.
b. Slip plasticchannelofgrassbagoverhooksonthe
frame,Figure3-5.All theplasticchannelsexcept
centertopof bagattachfromoutsideofbag.
c. Attachcentertopofbagfrominsideofbag.
6. Followstepsbelowtoattachthegrasscatcher:
a. Liftreardischargedoor.
b. Placegrasscatcheron thepivotrod.Letgo
ofdischargedoorsothat itrestson thegrass
catcher,Figure3-6.
7. Yourmoweris shippedasa mulcher.Toconvertto
sidedischarge,makesuregrasscatcherisoff ofthe
unitandreardischargedoorisclosed.
a. On thesideofthemower,liftthemulchingplug.
b. Slidechutehooksunderhingepinon mulching
plugassembly.Lowersidemulchingplug,Figure
3-7.Donotremovesidemulchingplugatanytime,
evenwhenyouarenotmulching.
_ WARNING:Neveroperate mowerunless the
hookson the grass catcherare firmly seated
on the pivot rod and the rear discharge door rests
firmly against top of thegrass catcher.
Adjustments
An adjustingplateandthumbleverateachwheel
providescuttingheightadjustment.
1. Depresslevertowardswheel.
2. Moveittoanyone ofthepositionsfordesiredcutting
height,Figure3-8. Makesurethateachwheelis
positionedatthesameheight.
3. Releaselevertowardsmowerdeck.
f
Figure3-5:Assemblethegrasscatcher.
Figure3-6:Attachthegrasscatcher.
J
Figure3-8:Useadjustmentleverstochangeheight. Figure3-7:Liftmulchplugandinstallsidedischargechute.
7
Never operate
mowerw thoutthe
mulching plug, the
grass catcher, or
the discharge chute
properly insiailedl
CUTTINGHEIGHT
Allwheelsmust be
positonedat the same
height.
i_iii_iI_ iiiiii_ii__i_: i_
i Thebladecontrolisa
i safetydevice.DONOT
i bypass itsoperations.
i Use extremecarewhen
handling gasoline.
Gasolineisextremely
flammable andthe vapors
i areexplosive.Neverfuel
the machineindoorsor
i whilethe engineishot
or running.Extinguish
cigarettes, cigars,pipes
andother sourcesof
i ignition.
i Keephandsand feet
awayfrom the chutearea
oncuttingdeck.Referto
warninglabel on the unit.
Theoperationofany
lawnmowercanresult
inforeignobjects being
i thrown intotheeyes,
whichcandamageyour
i eyesseverely.Always
, wearsafetyglasseswhile
operatingthe mower,
orwhileperformingany
adjustmentsorrepairs
onit.
Know Your Lawn Mower
_===== BladeControl
RecoilStarter======__
GrassCatcher======_
CuttingHeightAdjustment
Levers(frontandrear,for
eachwheel)
l
MulchPlug
SideDischargeChute
Figure4-1:Themaincomponentsonthe mower.
Nowthatyouhavesetupyourlawnmower,itsimportantto
Blade Control
Thebladecontrolisattachedtothe upperhandleof
themower.Depressand squeezeitagainsttheupper
handletooperatetheunit. Releaseittostopengineand
blade.
,_lk WARNING:This bladecontrolisa safety
device. Neverattempt to bypass itsopera-
tions.
Cutting Height Adjustment Levers
Oneadjustmentleverislocatedat eachwheelandis
usedtoadjustthecuttingheight.All fourwheelsmust
bepositionedatthe sameheighttoensurea uniform
cut.
Mulch Plug
Themulchplugisusedonlyformulchingpurposes.
Insteadofcollectingthegrassclippingsina grass
catcher,somemowermodelshavetheoptionof
recirculatingtheclippingsbacktothelawn.Thisis
calledmulching.
becomeacquaintedwithitscontrolsandfeatures.
Recoil Starter
Therecoilstarteris attachedtotherightupperhandle.
Standbehindtheunitand pullthe recoilstarterropeto
startthe unit.
Gas and Oil Fill-Up
Referto the enginemanualfor instructions.
1. Checkoillevelandaddoil if necessary.Followengine
manualforthis.
2. Servicetheenginewithgasolineasinstructedinthe
enginemanual.
,_ WARNING:Useextreme when
care
handling
gasoline. Gasolineisextremely flammable
and thevapors are explosive. Neverfuel the machine
indoorsor while the engine ishot or running. Extin-
guish cigarettes, cigars, pipes andother sources of
ignition.
Theoperationof anylawnmowercanresultinforeign
objectsbeingthrownintotheeyes,which candamage
youreyesseverely.Alwayswearsafetyglasseswhile
operatingthemower,or whileperforminganyadjust-
mentsor repairson it.
8
Starting Engine i
WARNING:Besurenooneotherthantheop- , /J
oratorisstandingnear the lawnmower while
starting engineor operatingmower.Never ....
runengine indoorsor in enclosed, poorly ventilated
areas. Engine exhaustcontains carbon monoxide,an
Operating
aower
odorless and deadly gas. Keep hands,feet, hair and
loose clothing awayfrom any moving partson engine
and lawn mower.
1. Pushprimerthreetimes.Waitabouttwoseconds
betweeneachpush,Figure4-2.Intemperature
around550For below,primefive times.Donotprime
to restarta warmengine.
2. Standingbehindthe mower,squeezethebladecontrol
againstupperhandle,Figure4-2.
3. Holdingthesetwo handlestogetherfirmly,grasprecoil
starterhandleand pullropeoutwitha rapid,continu-
ous,fullarmstroke,Figure4-2.Keepinga firmgripon
thestarterhandle,letthe roperewindslowly.Repeat
untilenginecranks.Letthe roperewindeachtime
slowly.
_IL ARNING:Wait for the bladeto stopcom-
pletelybefore performinganywork onthe
mower or to removethe grass catcher.
Stopping Engine
1. Releasebladecontroltostoptheengineand blade.
2. Disconnectsparkplugwirefromsparkplugand
groundagainsttheengine.
UsingYour Lawn Mower
Besurelawnisclearof stones,sticks,wire,or other
objectswhichcoulddamagelawnmowerorengine.
Suchobjectscouldbe accidentlythrownbythemower
in anydirectionandcauseseriouspersonalinjurytothe
operatorandothers.
_ WARNING:If youstrike aforeign object, stop
the engine.Removewirefrom the sparkplug,
thoroughly inspectmowerfor any damage,
and repair damagebeforerestarting and operating.
Extensivevibration of mower during operation isan
indicationof damage.Theunit should be promptly
inspectedand repaired.
Figure4-2:Startingthe mower.
1. Forbest results,do notcut wetgrass.
2. Fora healthierlawn,nevercut offmorethanone-
thirdofthetotallengthofthegrass.
Using as Mulcher
Formulchinggrass,removethegrasscatcheror side
dischargefromthemower.Thereardischargedoor
shouldbeclosed.
1. Foreffectivemulching,do notcut wetgrass.
2. Newor thickgrassmayrequirea narrowercut.
Adjustgroundspeedaccordingtoconditionoflawn.
3. If thegrasshasbeenallowedto growinexcessof
4 inches,mulchingisnotrecommended.Usethe
grasscatchertobagclippingsinsteador usethe
sidedischargetoreducethegrassheightto3-1/4
inchesor lessbeforemulching.
Using Grass Catcher
Youcanusethegrasscatchertocollectclippingswhile
youareoperatingthemower.
1. Attachgrasscatcherfollowinginstructionson page
7. Grassclippingswillautomaticallycollectinthe
bagasyourunthe mower.Operatethemowertillthe
grassbagisfull.
2. Stopenginecompletelybyreleasingtheblade
controlhandle.Makesurethattheunithascometo
a completestop.
3. Liftdischargedoorandpullgrassbagup andaway
fromthe mowertodisposeofthegrassclippings.
_ ARNING:Neveroperateyour mower
withouteitherthe rear door or theentire
grass catcher assembly firmly secured.
WARNING
Besure no oneotherthan
the operatorisstanding
nearthe lawn mowerwhUe
starting engine or operatinc
mower.Never run engine
indoorsor inenclosed,
poorlyventilatedareas.
Engineexhaustcontains
carbonmonoxide,an
odorless and deadlygas.
Keephands feet, hair and
looseclothingawayfrom
any moving partson engine
andlawn mower.
ifyoustrike aforeign
object,stop the engine.
Removewirefrom the spark
plug,thoroughly inspect
mowerfor anydamage,
and repair damagebefore
restarting and operating.
Extensivevibration of
mowerduring operationis
an indicationofdamage.
The unitshouldbepromptly
inspectedand repaired.
Neveroperateyour mower
withouteither the rear door
or the entire grass catcher
assembly firmly secured.
9
WA
disconnect sparkplug,
and groundagainstengine
before performinganytype
of maintenanceonyour
machine.
Nevertip the mowermore
ihan9oO nony
landdonorleavethe mower
iipped for any engthof
iimel Oil candrain intothe
Upperpart ofthe engine
pausing a startingproblem.
I
Do not use a pressure
washer orgardenhoseto
cleanyourunit.Thesemay
causedamageto bear'
ingS,or theengine:The
use ofwaterwillresultin
shortenedlifeandreduce
Deck Care
Cleanundersideofthe mowerdeckaftereachuseto
preventbuild-upofgrassclippingsorotherdebris.
1. Disconnectsparkplugwire.Draingasolinefromlawn
mower,or placea pieceof plasticunderthegascap.
2. Tipmowersothat itrestsonthe housing.Keepthe
sidewiththeaircleanerfacingup.Holdmowerfirmly.
_lb ARNING:Nevertip the mowermorethan 90°
inany direction and do not leavethemower
tipped for any length of time. Oilcan drainintothe
upper partof the enginecausinga startingproblem.
Figure5-1:Areasoflubrication(model435 shown)
General Recommendations
• Alwaysobservesafetyruleswhenperforming
anymaintenance.
• Thewarrantyon thislawnmowerdoesnotcover
itemsthathavebeensubjectedtooperatorabuse
ornegligence.Toreceivefullvaluefromwarranty,
operatormustmaintainthelawnmoweras
instructedhere.
• Changingofengine-governedspeedwillvoid
enginewarranty.
• Alladjustmentsshouldbecheckedat leastonce
eachseason.
• Periodicallycheckallfastenersand makesurethese
aretight.
_ ARNING:Alwaysstop engine,disconnect
spark plug, and groundagainst engine
before performing anytype of maintenance
on your machine.
Lubrication
• Lubricatepivotpointson thebladecontrolatleast
oncea seasonwithlightoil.Thebladecontrolmust
operatefreelyinbothdirections,Figure5-1.
• Lubricatethewheelsatleastoncea seasonwith
lightoil (ormotoroil). If wheelsareremovedforany
reason,lubricatesurfaceofthepivotarmandinner
surfaceof thewheelwithlightoil,Figure5-1.
• Lubricatethetorsionspringandpivotpointonthe
reardischargedoorandsidemulchplugperiodically
withlightoil topreventrust,Figure5-1.
• Followtheaccompanyingenginemanualforlubrica-
tionscheduleandinstructionforenginelubrication.
3. Scrapeandcleantheundersideofthedeckwitha
suitabletool.Donotspraywithwater.
4. Putthemowerbackonitswheelsontheground.If
youhadputplasticunderthegascapearlier,make
sureto removeitnow.
Engine Care
A listofkeyenginemaintenancejobsrequiredforgood
performancebythemowerisgivenbelow.Followthe
accompanyingenginemanualforadetailedlistand
instructions.
1. Maintainoil levelasinstructedinenginemanual.
2. Serviceaircleanerevery25 hoursundernormal
conditions.Cleaneveryfewhoursunderextremely
dustyconditions.Poorengineperformanceand
floodingusuallyindicatesthattheaircleanershould
beserviced.Toservicetheaircleaner,refertothe
enginemanual.
3. Cleansparkplugand resetthegaponcea season.
Sparkplugreplacementisrecommendedatthestart
ofeachmowingseason.Checkenginemanualfor
correctplugtypeand gapspecifications.
4. Cleanengineregularlywitha clothorbrush.Keepthe
coolingsystem(blowerhousingarea)cleantopermit
properaircirculation.Removeall grass,dirtand
combustibledebrisfrommufflerarea.
NOTE:Wedo notrecommendtheuseofa pressure
washeror gardenhosetocleanyourunit.Thesemay
causedamageto bearingsor theengine.Theuseof
waterwillresultinshortenedlifeandreduceservice-
ability.
10
_IL ARNING:Whenremovingthe cuttingblade
for sharpeningor replacement, protectyour
handswitha pairof heavyglovesor usea heavyrag
to hold theblade.
Periodicallyinspectthebladeadapterforcracks,
especiallyif youstrikea foreignobject.Replacewhen
necessary.Followthe stepsbelowforbladeservice.
1. Disconnectsparkplugwirefromsparkplug.Turn
moweron itssidemakingsurethattheairfilterand
thecarburetorareup.
2. Removetheboltandthe bladebellsupportwhich
holdthebladeand thebladeadaptertotheengine
crankshaft,Figure5-2.
3. Removebladeandadapterfromthecrankshaft,
Figure5-2.
4. Thebladecanbe sharpenedwitha fileor on a grind-
ingwheel.Donotattempttosharpenthebladewhile
itisstillon themower.Whensharpeningtheblade,
followtheoriginalangleofgrind.Grindeachcutting
edgeequallytokeepthebladebalanced.
5. Removebladefromtheadapterfortestingbalance.
Balancethebladeona roundshaftscrewdriverto
check.Removemetalfromtheheavysideuntilit
balancesevenly.
_ii ARNING:An unbalancedblade will cause
excessivevibrationwhenrotating at high
speeds.It may causedamageto mowerand could
break causingpersonalinjury.
/
/
\
Figure5-2:Removethebolt,support,andadaptertoaccess
theblade.
6. Lubricatetheenginecrankshaftandtheinnersurface
ofthebladeadapterwithlightoil.Slidetheblade
adapterontotheenginecrankshaft.
7. Placethebladeon theadaptersuchthattheside
oftheblademarked"Bottom"(orwithpartnumber)
facesthegroundwhenthemowerisintheoperating
position.Makesurethatthebladeisalignedand
seatedon thebladeadapterflanges.
8. Placebladebellsupportonthe blade.Alignnotches
on thebladebell supportwith smallholesinblade.
9. Replacehexboltandtightenhexboltto torque:450
in.Ibs.rain.,600 in.Ibs.max.
Toensuresafeoperationofyourmower,periodically
checkthebladeboltforcorrecttorque.
Replacing Rear Flap
1. Toremoverearflap,cutoff theflat endofthewirerod
whichsecuresitto thedeck,Figure5-3.
2. Attachthenewflapandnewrodto deck,bendingthe
endsofthenewrodovertosecuretodeck.
Figure5-3:Cutwiretoremoverearflap.
Off-Season Storage
Thefollowingstepsshouldbetakento prepareyour
lawnmowerforstorage.
• Cleanandlubricatemowerthoroughlyasdescribed
inthe lubricationinstructions.
• Donotusea pressurewasherorgardenhoseto
cleanyourunit.
Refertoenginemanualforcorrectengine
storageinstructions.
Coatmower'scuttingbladewithchassisgreaseto
preventrusting.
Storemowerina dry,cleanarea.Donotstorenext
tocorrosivematerials,suchas fertilizer.
Whenstoringanytypeof powerequipmentina poorly
ventilatedor metalstorageshed,careshouldbetaken
torust-prooftheequipment.Usinga lightoil or silicone,
coattheequipment,especiallycablesandall moving
partsofyourlawnmowerbeforestorage.
11
Maintaining
You
WARNING
Whenremoving the cutting
bladefor sharpeningor
replacement, protectyour
handswitha pairofheavy
glovesoruse a heavy rag
to hold the blade.
Anunbalancedblade will
causeexcessivevibration
whenrotating at high
speeds, it maycausedam-
age to mower,and could
breakcausingpersonal
injury.
repairsbeyond
theminoradjustments
listed here, contact
an authorizedservice
i ii i _ i
i i i i
/i _iii_ii_i_!i_/_ _i_ ii_iii_i
Problem Cause Remedy
Engine fails to Start i. Blade controldisengaged. Engagebiadecontrol
sparkp!ugwiredisconnected: I conBect WiretoSparkp!ug_
3. Fueltankemptyorstalefuel. 3. FiItankwith clean,freshgasoline.
4. Enginenotchoked. 4. Chokeengineas instructedinthe
OPe[atingYOU[LawnMower section•
5: Faultysparkpug 5, Clean,adjustgap,or replace.
6. BloCkedfuel linel 6, cieanfueliinel
7: Engineflooded. 7: Wait afew minutesto iestart,but do
I notprime:
Enginerunserratic 1. Sparkplugwireloose.
2. Blockedfuel lineor stalefuel.
3. Ventingascap plugged.
4. Wateror dirt infuel system.
5. Dirtyair cleaner.
6. Carburetorout ofadjustment.
1. Connectandtightensparkplugwire.
2. Cleanfuelline;filltank withclean,
freshgasoline.
3. Clearvent.
4. Drainfueltank. Refillwithfreshfuel.
5. Referto enginemanual.
6. Referto enginemanual.
Engine overheats 1 Engineoil levellow. 1. Fillcrankcasewith properoil.
2....A rfow restrcted I 2 Removebower housngandcean
3. Carburetornotadjustedpropery. 3• Refertoengne manua.
Occasional skips 1. Sparkpluggap tooclose. 1. Adjust gapto .030-inch.
(hesitates) at high speed 2. Carburetoridlemixtureadjustment 2. Referto enginemanual.
improperlyset.
Idles poorly 1. Sparkplugfouled,faultyor gaptoo wide. 1. Resetgapto .030-inchor replace
sparkpug.
2 Carburetorimproperlyadjusted 2. Referto enginemanual.
. 3. Dirtyair cleaner. 3. Referto enginemanual.
Excessive Vibration 1. Cuttingbladelooseor unbalanced. 1. Tightenbladeandadapter.Balance
blade.
2. Bentcuttingblade. 2. Seeanauthorizedservicedealer.
Mower will not mulch grass 1 Wetgrass• 1. Donot mowwhengrassiswet wait
untillatertocut.
2. Excessivelyhighgrass. 2. Mowonce atahighcuttingheight,
then mowagainatdesirecJheightor
I makeanarrowerCuttingpath.
, 3. Du bade. , 3• Sharpenor replaceblade.
Uneven cut 1. Wheelsnotpositionedcorrectly. 1. Placeallfour wheelsin same
heightposition.
2. Dullblade. 2. Sharpenor replaceblade.
ii_ i!_i_ii_ii_I _ii i ii _i i
NOTE:SpeCifications are
SubjeCt to change without
notification or obligation.
!mage s my not reflect your
exact model and are for
[efe[ence purposes oniy:
i
12
13
ii i _iI_ii
Model Series 430
"s @
14
Fief. PartNo. Description
No.
1 747-1161A BladeControlHandle
2 749-1092A UpperHandle
3 747-04080 GrassCatcherFrame
4 749-0928A LowerHandle
5 720-0279 WingNut
6 710-1205 RopeGuide
7 710-1174 CarriageBolt,5/16-18x2
8 664-04027 GrassBagAssembly
9 720-04072 HandKnob
10 731-1506A FrontCover
11 726-0240 CableTie
12 710-0703 CarriageBolt,I/4-20
13 731-04134A RearDischargeDoor
14 750-04162 Spacer
15 732-04089A TorsionSpring- LH
16 732-04090A TorsionSpring- RH
17 734-04087 RearWheel,8 x 1.8
18 731-04150C RearBaffle
19 710-0599 Screw,1/4-20x.500
20 787-01279 Deck- 21"
21 687-02055 HingedMulchPlugAssembly
22 782-5002B FrontBaffle
23 748-0377C BladeAdapter
24 742-0741 MulchingBlade
25 710-1257 HexScrew,3/8-24x2.5
26 687-02076A PivotArmAssembly-RH
687-02077At PivotArmAssembly-LH
27 736-0524B BladeBellSupport
28 787-01290 FrontAdjustmentPlate
Fief. PartNo. Description
No.
29 720-0426 AdjustmentLeverKnob
30 732-0404 SpringLeverAssembly
31 787-01292 HandleBracket-RH
787-01291t HandleBracket-LH
32 734-04086 FrontWheel,7 x 1.8
33 710-04371 Screw,1/4-15x 1.250
34 746-1137 ControlCable-53" SnapOn
35 731-04525 EngineShroud
36 731-04998 Trailshield
37 732-0700 TrailshieldWire
38 712-0397 WingNut,1/4-20
39 747-04035 RearDoorPivotRod
40 732-04175 SpringLever
41 687-02071A PivotArmAssembly- RH
687-02070At PivotArmAssembly- LH
42 710-1652 ABScrew
43 712-04065 FlangeLockNut,3/8-16
44 714-0104 HairpinClip
45 710-0654A TTSeresScrew,3/8-16x 1.0
46 687-02099A Ht.Adj.Assy.Front- LH
687-02100At Ht.Adj.Assy.Front- RH
47 687-02069 RearHandleBracketAssy.- LH
687-02068t RearHandleBracketAssy.- RH
48 732-1014 TorsionSpring
49 731-04177 SideChute
50 747-0710 HingePin
51 738-0507B ShoulderScrew
52 736-0270 BellWasher
53 17032A DeflectorChuteAdaptor
t NotShown
!i iii!ii !i i ii ii ii ii!iii ii i i!i I I IIII ! II
Toorderrop acer.eot
parts;call
1,800,800-7310
or visit us onthe Webat
www.yardman:com
15
MANUFACTURER'S LiMiTED WARRANTY FOR
ThelimitedwarrantysetforthbelowisgivenbyMTDLLCwithrespectto
newmerchandisepurchasedandusedin theUnitedStates,itsposses-
sionsandterritories.
"MTD"warrantsthisproductagainstdefectsin materialandworkmanship
fora periodoftwo(2) yearscommencingonthedateoforiginalpurchase
andwill,atits option,repairor replace,freeofcharge,anypartfoundto
bedefectiveinmaterialsor workmanship.Thislimitedwarrantyshallonly
applyifthis producthasbeenoperatedandmaintainedinaccordance
withtheOperator'sManualfurnishedwiththeproduct,andhasnotbeen
subjectto misuse,abuse,commercialuse,neglect,accident,improper
maintenance,alteration,vandalism,theft,fire,water,ordamagebecause
ofotherperilor naturaldisaster.Damageresultingfromtheinstallationor
useofanypart,accessoryorattachmentnotapprovedbyMTDforuse
withtheproduct(s)coveredbythis manualwillvoidyourwarrantyasto
anyresultingdamage.
Normalwearpartsarewarrantedto befreefromdefectsinmaterialand
workmanshipfora periodofthirty(30)daysfromthedateof purchase.
Normalwearpartsinclude,butare notlimitedto itemssuchas: batteries,
belts,blades,bladeadapters,grassbags,riderdeckwheels,seats,snow
throwerskidshoes,shaveplates,augerspiralrubberandtires.
NOWTOOBTAINSERVICE:Warrantyserviceisavailable,WITH
PROOFOFPURCHASE,throughyourlocalauthorizedservicedealer.To
locatethedealerin yourarea,checkyourYellowPages,orcontactMTD
LLCatRO.Box361131,Cleveland,Ohio44136-0019,or call1-800-800-
7310or logon toourWebsiteatwww.mtdproducts.com.
Thislimitedwarrantydoesnot providecoverageinthefollowingcases:
a. Theengineor componentpartsthereof.Theseitemsmaycarrya
separatemanufacturer'swarranty.Refertoapplicablemanufacturer's
warrantyfortermsandconditions.
b. Logsplitterpumps,valves,andcylindershavea separateoneyear
warranty.
c. Routinemaintenanceitemssuchaslubricants,filters,blade
sharpening,tune-ups,brakeadjustments,clutchadjustments,deck
adjustments,andnormaldeteriorationoftheexteriorfinishduetouse
orexposure.
d. Servicecompletedbysomeoneotherthananauthorizedservice
dealer.
e. MTDdoesnotextendanywarrantyforproductssoldor exported
outsideofthe UnitedStates,itspossessionsandterritories,except
thosesoldthroughMTD'sauthorizedchannelsofexportdistribution.
f. ReplacementpartsthatarenotgenuineMTDparts.
g. Transportationchargesand servicecalls.
No impliedwarranty,includinganyimpliedwarranty of merchant-
ability of fitness for a particularpurpose,applies after the applicable
periodof expresswritten warranty aboveas to the partsas identi-
fied. Noother expresswarranty, whether written or oral, exceptas
mentionedabove,givenby anypersonor entity,includinga dealer
or retailer,with respect to anyproduct,shallbind MTD.Duringthe
periodof the warranty, the exclusive remedyisrepairor replacement
of the productas set forth above.
Theprovisionsas set forth inthis warranty providethe sole and
exclusive remedyarising from the sale. MTDshall not beliable
for incidentalor consequential loss or damageincluding,without
limitation, expensesincurredfor substitute or replacementlawncare
services or for rentalexpensesto temporarily replacea warranted
product.
Somestatesdo notallowtheexclusionor limitationofincidentalor
consequentialdamages,or limitationson howlonganimpliedwarranty
lasts,sotheaboveexclusionsor limitationsmaynotapplytoyou.
Innoeventshallrecoveryofanykindbegreaterthantheamountofthe
purchasepriceoftheproductsold.Alterationof safetyfeatures of the
productshallvoid this warranty. Youassumetheriskandliabilityfor
loss,damage,or injurytoyouandyourpropertyand/ortoothersandtheir
propertyarisingoutofthemisuseor inabilitytousetheproduct.
Thislimitedwarrantyshallnotextendto anyoneotherthantheoriginal
purchaseror tothepersonforwhomitwaspurchasedasa gift.
HOWSTATELAWRELATESTOTHISWARRANTY: Thislimitedwar-
rantygivesyouspecificlegalrights,andyoumayalsohaveotherrights
whichvaryfromstatetostate.
IMPORTANT:OwnermustpresentOriginalProofofPurchasetoobtain
warrantycoverage.
MTD LLC, P.O. BOX 361131 CLEVELAND, OHiO 44136-0019; Phone: 1-800-800-7310
/