Troybilt 21A-644A711, 21A-640C711 Owner’s Manual

®

O m m 'w//////al&_Aiiiiiiiiiiiiir

Operator's Manual

/m

Rear-tine Tiller Models

640C-- Tuffy_ CRT
644A m Super Bronco TM CRT

Mode1644A Shown

IMPORTANT: Read safety rules and instructions carefully before operating equipment.

Warning: This unit isequipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-

covered or grass-covered land unless the engine's exhaust system is equipped with a spark attester meeting applicable local or state laws (if
any). If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required
by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark
arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131

Cleveland, Ohio 44136-0019.

Troy-Bilt LLC,P.O.BOX361131CLEVELAND,OHIO44136-0019

PRINTEDINU.S.A. FORMNO. 769-00585C

9/15/04

TABLEOFCONTENTS

Content Page Content Page

Customer Support 2 Maintenance 17
Safety 3 Off-season Storage 21
Assembly 6 Troubleshooting 22

Features and Controls 10 Parts List 23
Operation 12 Warranty Back Cover

FINDINGMODELNUMBER

This Operator's Manual is an important part of your new lawn tractor. It will help you assemble, prepare and maintain the
unit for best performance. Please read and understand what it says.

Before you start assembling your new equipment, please locate the model plate on the equipment and
copy the information from it in the space provided below. A sample model plate is also given below. You can
locate the model plate by looking at the rear of the tine shield. This information will be necessary to use the
manufacturer's web site and/or help from the Customer Support Department or an authorized service dealer.

Copy the model number here:

OTRDV-BILT T,OV-BmLTLLC

www.troybilt.com CLEVELAND,OH44136

,. 1-800-520-552_

P. O. BOX 361131

330-558-7220

Copy the serial number here:

CUSTOMERSUPPORT

PleasedoNOTreh/m thel/nit totheretailer withoutfirstcontactingCustomerSupport.

If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of
this unit, you can seek help from the experts. Choose from the options below:

Visit troy-bilt.com for many useful suggestions. Click on Customer Support button and you
will get the four options reproduced here. Click on the appropriate button and help is

immediately available.

_ 7>,,,,

/;/ ,> ;'V }/ )

..... f ; @; t ;D

j;_ ?" #'s " 4t, ' F_ i/!s ,

* ;,, #FOX }_ j,"

,,, >,, rL;, " ¢j ,_ <# ft, *x J ,7;; _

'_,-., _tf';_'ivc ,l

,v yO, ,_;7f'_;:'

If you prefer to reach a Customer Support Representative, please call 1(800) 520-5520.

The engine manufacturer is responsible for all engine-related issues with regard to

performance, power-rating, specifications, warranty and service. Please refer to the engine
manufacturer's Owner's/Operator's Manual, packed separately with your unit, for more

information.

SECTION1: SAFETY

This machine meets voluntary safety stan-
dard B71.8-1996, which is sponsoredbythe
Outdoor Power Equipment Institute, Inc.,
and is published by the American National

Standards Institute.

WARNING

The engine exhaust from this productcontains
chemicals known to the State of California to

cause cancer, birth defects or other reproduc-

SafetyAlertSymbol

ForwardClutchBail

ReverseClutchControl

(Models644A)

DepthRegulator

TineHoodFlap

,_ This is a safety alert symbol. It is used

and any other literatureyou may receive.
Bethoroughly familiar with the controls
andthe proper use ofthe tiller and its en-
gine. Knowhowto stopthe unit anddisen-
gagethe controls quickly.

2. Neverallowchildrento operatethetiller.
Neverallow adults to operatethe tiller
without proper instruction.

3. Keepthe area of operationclear of all
persons, particularly children andpets.

4. Keepin mindthat theoperatoror useris
responsible for accidentsor hazardsoc-
curring to other people,their property,and

themselves.

in this manual and on the unit to alert
you to potential hazards. When you see

this symbol, read and obey the
message that follows it. Failure to obey

safety messages could result in
personal injury or property damage.

3. Donotoperatethetiller without wearing

1. Carefully readthis Own-

Training

er's Manual,the separate
Engine Owner'sManual,

adequateouter garments. Avoid loose gar-
ments or jewelry thatcould get caught in
moving parts.

4. Donot operatethe tiller when barefoot
or wearing sandals, sneakers,or light foot-
wear.Wear protective footwear that will
improve footing on slippery surfaces.

5. Donottill nearundergroundelectric ca-
bles,telephone lines, pipes or hoses. If in
doubt, contactyour telephone or utility

company.

6. Warning: Handlefuel with care; it is
highly flammableand its vapors areexplo-
sive.Takethe following precautions:

a. Storefuel in containers specifically

b. Thegascapshall neverberemovedor

Preparation

1. Thoroughly inspect the areawhere the

tiller is to be usedand removeallforeign

objects.

2. Be sure all tiller controls are released
and both wheels arein the Wheel Drive po-

sition beforestarting the engine.

c. Keepmatches,cigarettes, cigars,

d. Fill fuel tank outdoorswith extreme

Standard-Rotating-Tines

(CRT)

DrivePin

Figure 1-1: Tiller featuresand contre/s. See separateEngineOwner'sManua/ to
identifyenginecontre/s.

e. Replaceall fueltank andcontainer

caps securely.

f. If fuel isspilled, do not attempt to

start the engine, but move the ma-
chineawayfrom the areaof spillage
and avoid creating any sourceof ig-
nition until fuel vapors havedissi-
pated.

7. Nevermakeadjustments when engineis
running (unless recommendedby manu-

facturer).

Operation

1. Do not put hands or feet near or under
rotating parts.

designedfor this purpose.

fueladdedwhiletheengineisrunning.
Allowthe engineto coolforseveral
minutesbeforeaddingfuel.

pipes, openflamesand sparksaway
from thefueltankand fuelcontainer.

care.Neverfill fueltank indoors.Use
a funnel or spout to preventspillage.

2. Exerciseextremecaution when on or

crossing gravel drives, walks, or roads.
Stayalert for hiddenhazardsor traffic. Do

not carry passengers.

3. After striking a foreign object, stop the

engine,removethe wire from the spark
plug wire andprevent it from touching the
spark plug. Thoroughly inspect the ma-
chine for any damageand repairthe dam-
agebefore restarting andoperatingthe

machine.

4.Exercisecautiontoavoidslippingorfall-
ing.

5.Iftheunitshouldstarttovibrateabnor-
mally,stoptheengine,disconnectthe

sparkplugwireandpreventitfromtouch-
ingthesparkplug,andcheckimmediately
forthecause.Vibrationisgenerallya
warningoftrouble.

6. Stopthe engine, disconnectthe spark
plug wire andprevent it from touching the

spark plug, wheneveryou leavethe operat-
ing position, beforeunclogging thetines,

or whenmaking any repairs,adjustments
or inspections.

7. Takeall possible precautionswhenleav-
ing the machine unattended.Stopthe en-

gine. Disconnectthespark plug wire and
move it awayfrom thespark plug. Besure

that both wheelsarein the Wheel Drive po-

sition.

8. Beforecleaning, repairing,or inspect-
ing, stop the engine and make certain all

moving partshavestopped. Disconnect

the spark plug wire and preventit from
touching thespark plugto preventacci-

dentalstarting.

9. Theflapon thefine hood must bedown
when operatingthetiller.

10. Neveruse the tiller unless proper
guards, plates, or other safetyprotective
devicesare in place.

11. Donot run the enginein an enclosed
area.Engineexhaust containscarbon

monoxide gas, a deadlypoison that is
odorless, colorless, and tasteless.

12. Keepchildren and pets away.

13. Never operate the tiller underengine

powerif thewheels are in theFreewheel
position.Inthe Freewheelposition,the

wheelswill not holdthe tiller back andthe
revolvingtines could propel thetiller rapid-

ly,possibly causingloss ofcontrol. Always
engagethe wheels with the wheel drive
pins in theWheel Drive position before
starting the engine or engaging the

tines4Nheelswith the ForwardClutch Bail

(all models)or the ReverseClutchcontrol
(Model 644A only).

14. Beaware that the tiller may unex-

pectedlybounceupwardorjumpforward
if the tines shouldstrikeextremelyhard
packedsoil, frozenground,or buriedob-
stacleslike large stones,roots,or
stumps.

If indoubtaboutthetilling conditions, al-

ways usethe following operating precau-

tionsto assistyouin maintainingcontrol
of the tiller:

a. Walk behindandto one side of the

tiller, usingone handonthehandle
barsRelax yourarm, but usea

securehandgrip.

b. Useshallowerdepthregulator

settings,working graduallydeeper

with eachpass.

¢. Use slower enginespeeds.

d. Clearthetilling area of all large

stones,rootsor other debris.

e. Avoidusingdownwardpressureon

thehandlebars.If needbe, use
slight upwardpressureto keep the

tinesfrom diggingtoodeeply.

f. Beforecontacting hardpackedsoil

at the endofa row,reduceengine
speedand lift thehandlebarsto

raise the tines out of the soil.

g. In an emergency,stopthe tinesand

wheels byreleasingwhichever
clutch controlis engaged.Do not

attemptto restrainthetiller.

15. Donot overloadthe tiller's capacityby
attempting to till too deeplyat too fast a

rate.

16. Neveroperate the tiller at high trans-
port speeds on hard orslippery surfaces.

Look behind and usecarewhen backing
up.

17. Donot operatethetiller on aslope that
is too steep for safety.When onslopes,

slow down and makesure you havegood
footing. Neverpermit thetille rto freewheel

down slopes.

18. Neverallow bystandersnearthe unit.

19. Onlyuseattachmentsand accessories

that areapproved by the manufacturer of
the tiller.

20. Usetiller attachmentsand accessories
when recommended.

21. Neveroperate the tiller without good
visibility or light.

22. Neveroperatethe tiller if you aretired;
or underthe influence ofalcohol, drugs or

medication.

23. Operatorsshall not tamper with theen-
gine-governor settings onthe machine;

the governor controls the maximum safe

operatingspeedto protectthe engineand
all movingparts from damagecaused by

overspeed.Authorized serviceshall be
sought if a problem exists.

24. Do not touch engine parts which may
behot from operation.Letparts cool down

sufficiently.

25. Pleaseremember:Youcan alwaysstop

thetines andwheels by releasingthe For-
ward ClutchBail or on Model644Athe Re-

verseClutchcontrol, (whichevercontrol is
engaged),or bymoving the ignition switch
and/orthrottle control leveron the engine

to "OFF" or "STOP".

26. Toload or unloadthe tiller, seethe in-

structions in Section4 of this Manual.

27. Useextreme caution when reversing

or pullingthe machinetowards you.

28. Startthe enginecarefully accordingto

instructions and with feetwell awayfrom
thetines.

29. Neverpick up or carry a machinewhile

the engineis running.

MaintenanceandStorage

1. Keepthe tiller, attachmentsand acces-

sories in safeworking condition.

2. Checkall nuts, bolts, and screws for

proper tightness to besurethe equipment
is in safeworking condition.

3. Neverstore thetiller with fuel in thefuel

tank insidea building whereignition sourc-
esare presentsuchashot waterandspace

heaters,furnaces, clothes dryers, stoves,
electric motors, etc.). Allow the engineto
cool beforestoring the unit in any enclo-

sure.

4. Toreducethe chances of afire hazard,

keepthe enginefreeofgrass, leaves,or ex-
cessivegrease.

5. Storegasolinein acool, well-ventilated

area,safelyawayfrom any spark- or
flame-producing equipment. Store gaso-
line in an approvedcontainer,safelyaway

from the reachof children.

6. Referto the Maintenancesections of

this Manualand the separateEngineOwn-
er'sManualfor instructions ifthe unitis to

bestored for an extendedperiod.

7. Neverperform maintenancewhilethe

engineis running orthe spark plug wire is
connected,exceptwhen specifically in-
structed to do so.

8. Ifthe fueltank hasto be drained,dothis

outdoors.

Decals

Foryour safety and the safety of others, vari-
ous safety and operationaldecalsare located
on your unit (seeFigure 1-2).

Keepthe decalsclean and legible atall times.
Contactyour localservicedealeror thefactory

for replacementsif any decalsaredamagedor
missing.

Referto the Parts List pagesin this Manualfor
decallocations, descriptionsand part num-

bers.

ForwardClutchBail

StartingStabilization

Message(on engine)

Figure 1-2: Locationofsafety and operatingdeca/s.

ReverseClutch Control

OperatingInstruction

(Models 644A)

WarningMessages

HotSurfacesWarning

OperatingSymbols

Varioussymbols(shownhere,withworddescriptions)
mayheusedonte'dllerandengine.

NOTE:Yourunitmaynothaveallof_esymbds.

FAST SLOW STOP

* READTHEOWNER'SMANUAL.
* KNOWLOCATIONSAND FUNCTIONSOFALLCONTROLS.
* KEEPALLSAFETYDEVICESANDSHIELDSIN PLACEANDWORKING.
° NEVERALLOWCHILDRENORUNINSTRUCTEDADULTSTOOPERATETILLER.
° SHUTOFFENGINEANDDISCONNECTSPARKPLUGWIREBEFOREMANUALLYUN-

CLOGGINGTINESORMAKINGREPAIRS.
° KEEPBYSTANDERSAWAYFROM MACHINE.
° KEEPAWAYFROM ROTATINGPARTS.
° USEEXTREMECAUTIONWHENREVERSINGOR PULLINGTHEMACHINETOWARDS

YOU.

I"1 I*1 R

CHOKE CHOKE REVERSE

ON OFF ROTATINGTINES

<,-K,

TILLERDIRECTION

TO AVOID SERIOUS INJURY:

<--o-->

LEVERDIRECTION

BAIL

ENGAGED

BAIL

DISENGAGED

SECTION2: ASSEMBLY

WARNING: Toprevent

personalinjury or property
damage,do notstart the engine

until all assemblysteps are
completeandyou have read

and understandthesafety and
operatinginstructions in this
manual.

INTRODUCTION

Carefullyfollow theseassemblysteps to
correctly prepareyour tiller for use. It is
recommendedthatyou readthis Sectionin
its entirety beforebeginning assembly.

NOTE: Various rifler models are

presented in this Manual. Use only the
information appropriate for your tiller
model. Enginestyles vary by model, Your
engine may appear differently than those

illustrated in this manual.

INSPECTUNIT

Inspect the unitand carton for damageim-
mediatelyafter delivery.Contactthe carrier

(trucking company) if you find or suspect
damage. Inform them of the damageand

request instructions for filing a claim. To
protect your rights, put your claim in writ-

ing and maila copyto the carrierwithin 15
days after the unit has beendelivered.

ContactTroy-Bilt LLCif you needassis-

tance inthis matter.

TOOLS/ MATERIALSNEEDED

(2) 1/2" open-end wrench*
(2) 9/16" open-endwrench*
(1) 3/8" open-endwrench*

(1) Largeadjustable wrench

(Models 644A only)
(1) Scissors (totrim plasticties)
(1) Ruler (for belttension check)
(1) Block of wood (to support tiller when

removing wheels)
(1) Tire pressure gauge (for models with

pneumatictires)
(1) Cleanoil funnel
(1) Motor oil. Referto the EngineOwner's

Manualfor oilspecificationsand

quantityrequired.

* Adjustable wrenchesmay be used.

ASSEMBLYSTEPS

STEP 1: UNPACKING INSTRUCTIONS

NOTE:While unpacking, do not severely
bend any control cables.

1.Thetiller weighs approximately 133 Ibs.
Do notattempt to remove it from the ship-

ping platform until instructed to do so in

these Assembly steps.

2. Removeany packagingmaterial from

the carton. Removeany staplesfrom the

bottom of the cartonand removethe car-

ton from the shipping platform.

3. Removeall unassembledparts andthe
separatehardwarebag from the carton.

Checkthat you havethe items listed in the
LooseParts List (contactyour localdealer
or the factory items are missing or dam-
aged).

NOTE: Use the screw length template

(Fig,2-1) to identify screws,

LooseParts List

Qty. Description
1 HandlebarSupport (seeA, Fig. 2-2)

1 HandlebarAssembly(seeK, Fig.2-2)

Hardwarebag contents:

4 Hexhd. screw, 5/16-18 x 1-1/2"
2 Hexhd. screw, 3/8-16 x 3/4"
2 FlatWasher,3/8"

4 Split lockwasher,5/16"
4 Hexnut, 5/16"-18

2 HexIocknut, 34}"-16

*Model 644Aonly

IMPORTANT:Motor oil must beaddedto

the enginecrankcasebeforetheengine is

started. Followthe instructions inthis
Sectionand in the separateEngine

Owner's Manual.

NOTE: LEFTand RIGHTsides of the tiller
are as viewedfrom theoperator's position

behind the handlebars.

STEP 2: ATTACHHANDLEBAR

1. Looselyattachthe legs of thehandlebar
support (A, Fig. 2-2) to the inner sides of

the tiller frame usingtwo 3/8"-16x 3/4" hex

hd. screws (B), 3/8" flat washers(C), and
3/8"-16 hex Iocknuts (D).

_iiii

Figure2-1: Toidentifylengthofscrews,place

screwontemplateasshownandmeasuredis-

tancebetweenbottomofscrewheadandtipof

screw.

2. Usingtwo 5/16"-18 x 1-1/2"screws (G),
5/16" split lockwashers (H) and 5/16"-18
hexnuts (I), looselyattach the handlebar
support (A)usingthe upperholes.Tighten

thetwo screws securely.

3. Therearethree heightadjustment holes
in the two handlebar support brackets (E

and F,Fig. 2-2). Usea setting that will po-
sition the handlebarsat approximately
waist levelwhenthetines are3"-4" into the

soil. Looselyattachthe support bracketsto
theoutsideofthe handlebarassembly (K)

usingtwo 5/16"-18x 1-1/2" screws (G),5/

16"split lockwashers(H)and5/16"-18 hex
nuts (I).NOTE:Ifa support bracketwill not
move, loosenattaching screw (J) and nut.

IMPORTANT:The support bracketsmust

beassembledtotheoutsideofthe
handlebarassembly.

4. Tightenall handlebarmounting hard-
waresecurely.

STEP 3: MOVE TILLER OFF CRATE
Toroll the tiller off the shipping platform,

put the wheels in freewheel,asfollows:

1. Placeasturdy block underthetransmis-
sion to raise one wheel about 1"off the

ground.
2, Removethe hairpin cotter (L, Fig.2-3)

and wheel drive pin (M) from the wheel
hub (0) and wheelshaft (N).

3. Slidethe wheelfully inwardonthe wheel
shaft (N, Fig.2-3). Reinstall the wheel

°-! °

Fig. 2-3: Wheel in FREEWHEELposition

Fig. 2.2: Attachhandlebar.

drive pin (M) through thewheelshaft only
(not through the wheelhub). Securethe

wheeldrive pin with the hairpin cotter (L),
pushingthe hairpincotter in as far as it will

go. Thewheelshould now spin freely
(freewheel) on the wheelshaft. Repeat

with the other wheel.

4. Usethe handlebarto roll the tiller to a
flat area.

A

J

B

STEP 4: INSTALL FORWARD

CLUTCH CABLE

1. Carefullyunwrapthe forward clutch ca-

ble(cablewithout an attachedknob) from
its shipping position andslide thethin ca-

blewire (T,Fig. 2-4) into the slot in the ca-

blebracket. Pushthe cable connector (U,
Fig.2-4) upthrough the holein thebracket

untilthe groove inthe connector snaps
into place.

2. Threadthe#10-24 hexnut (Z, Fig. 2-5)
halfway ontothe screw (V) which runs
through the spring (W, Fig.2-5).

3. Threadthe screw (V) into the cablead-
juster (X).

IMPORTANT: Beforestartingthe engine,

the wheels must beplacedin the WHEEL

DRIVEposition (pinsthrough wheel hubs
andwheelshaft). This procedureis

describedin WheelDrivePinsin Section3.

Fig. 2-4: Installingforward clutchcable bracketand cable.

4. Checkfor correcttension ontheforward
drive belt by taking two measurements of

the cablespring, as follows:

a.With the Forward Clutch Bail (Y,Fig. 2-

6) in an open (released)position, measure

the length of thecablespring (W) fromthe

outermost coil to the outermost coil.
b. Squeezethe ForwardClutch Bailagainst

the handlebar(see Fig. 2-7) and re-mea-

surethe spring length. The belt tension is
correct if this second measurementis be-

tween 1/16"to 3/16" longerthanthe first

measurement.If so,turn the hexnut (Z,
Fig. 2-7) tightly against the cableadjuster
(X) while preventingthe cableadjuster

from turning.
c. Ifthe spring lengthis incorrect, you

must adjustthe cabletension asdescribed
in Checkingand Adjusting ForwardDrive

Belt Tensionin Section5. Incorrect cable

tension can result in belt slippage (cable
tension too loose), or unintentional tine

movement when the clutch bail is in Neu-

tral (cabletension too tight).

Wm

W

iiiiiiiiiiiiiiii

Fig. 2-7: Tocheckforwardbelt tension,take two measurementsofthelengthof the coils inthe
spring-- firstwiththebail open, then withthe bail held against thehandlebar.

STEP 5: INSTALL REVERSECLUTCH
CABLE (MODEL 644A ONLY)

1. Unwrapthe reverseclutch cable (CC,

Fig.2-8 and Fig.2-9) from itsshipping po-
sition androute it up to the handlebar. Be

surethat the cableis routed beneaththe
Forward Clutch Bail.

2. Insertthecable(CC,Fig.2-8)through the
slot inthecablebracketandpositiontheflat
sideof thethreadedassemblynextto the
flat side ofthe hole.Slidethe hexnut (DD)
up the cable andtighten it securely.

Flat Side

3. Fastenthe reverseclutch cable to the
left side handlebarwith acabletie (EE,Fig.

2-9).

4. Testthefunction ofthe reverseclutch by

Fig. 2-8:/nsta//reverse cablebracketand
reverseclutchcable.

pulling out and releasingthe cable knob.
Theknob should return to its neutral posi-

tion (resting against bracket). If it doesn't,

contact your local dealeror Troy-Bilt LLC
for technical assistance.

Fig.2-5: Cable
springand
adjuster.

Fig. 2-6: Attachforward
clutchcable spring to

forwardclutch bail.

Fig. 2-9: Routereverse clutchcable (CC) as

shown.Attachwithcable tie (EE).

5! 6: CHECKTRAHSMiSSiOH
OILLEVEL

Thetransmission wasfilledwith gearoil at
thefactory. However,you shouldcheckthe
gear oil levelat this time to makecertain it

is correct.
IMPORTANT:Donot operatethetiller ifthe

gear oil level islow. Doingso will result in
severedamageto the transmission com-
ponents.

1. With the tiller on levelground, pull the
Depth RegulatorLever(FF,Fig. 2-10) back

andthen all theway up until the lowest
notch inthe lever isengaged.

2. Removethe oil fill plug (GG,Fig. 2-11)
from the transmission housing cover and

locatethe main drive shaft situated inside
the housing.

3. Thegear oil level is correct ifthegear oil
isapproximately halfway upthe sideofthe

main driveshaft.

4. Ifthe oil levelislow, add gear oil by re-
ferring to A. ToCheckthe Transmission

dear 0il Level in Section5.

I El-'/: AUU IVlUI UH UIL

Thetiller isshipped withoutoil in the en-
gine.

IMPORTANT:Donot start the engine with-
out first adding motor oil. Severeengine

damagewill result if the engineis runwith-
out oil.

1. Referto the separateEngineOwner's
Manualfor engine oil specifications and

capacities.

2. With thetiller on levelground, movethe
Depth RegulatorLever(FF,Fig.2-10) upor

down until the engineis level.

3. Addmotor oil as describedin the En-
gine Owner's Manual.

4. Movethe DepthRegulator Leverall the
way down untilthe highest notch is en-
gaged.This placesthe tines in the"travel"
position, which allows the tiller to be
moved without thetines touching the
ground.

_1 El-'8: I.;HEI.;K HAHUWAHE
Checkall nuts and screws for tightness.
STEP g: CHECK AIR PRESSURE IN

TIRES (unitswithpneumatictires)

Checkthe air pressurewith a tire gauge.

Deflateor inflatethe tires equally to be-
tween 15 PSIand 20PSI (pounds per
squareinch). Besurethat bothtires arein-
flated equally or the unit will pull to one

side.

Fig. 2-10: AdjustDepth RegulatorLever.

Fig. 2-11: Removegear oil fill plug.

IMPORTANT: This completesthe assemblysteps. Be-
fore operatingyour tiller, makesure you readthefollow-
ing sectionsin this Manual,as well asthe
separateEngineOwner'sManual:

• Section1: Safety

• Section3: Featuresand Controls

• Section4: Operation

SECTION3: FEATURESANDCONTROLS

_ ARNING: Before

operatingyour machine,
carefully readand understand

all safety, controls and
operatinginstructions in this

Manual,the separateEngine
Owner's Manual,and on the
decalson the machine.

Failureto follow these
instructions can result in

serious personal injury.

INTRODUCTION

This Section describesthe locationand

function ofthecontrols onyourtiller. Refer
to the following Section, Operationfor de-
tailed operatinginstructions.

Practice usingthese controls, with the en-

gine shut off, until you understandthe op-

eration ofthe controls andfeel confident

with eachof them.

ENGINE CONTROLS

Referto the enginemanufacturer'sEngine

Owner'sManual (included inthe tiller liter-

aturepackage)to identify the controls on
your engine.

IMPORTANT:Thecontrol for stopping the

engine is locatedonthe engine.

WHEEL DRIVE PINS

Eachwheel is equippedwith awheel drive

pin (A, Figures3-2 and 3-3) that secures
the wheelto the wheelshaft (B). The

wheelscan be positioned in either a

WHEELDRIVEor a FREEWHEELmode.

_ WARNING: Neverallow

either ofthewheelsto bein the
FREEWHEELposition whenthe

engineis running. Alwaysput
both wheelsin theWHEEL

DRIVEposition beforestarting

the engine.

Failureto comply could cause
loss of tiller control, property
damage,or personalinjury.

Beforestarting the engine,put both wheels

in the WHEELDRIVEposition byinserting
the wheel drive pins through the wheel

hubsandthewheelshaft. Doingso "locks"
the wheels to the wheelshaft, causing the

wheelsto turn when either the

ForwardClutch

Figure3-1: Tiller features and controls.See separateEngineOwner's Manual to identify
enginecontrols.

Bail ReverseClutchControl

(Model 644A)

gulator

HandlebarHeight Adjustment

Wheel Drive Pin

(oneachwheel)

Forward Clutch Bail (all models) or the Re-
verse Clutch Control (Model 644A)is en-

gaged.
Usethe FREEWHEELmode only whenthe

engineis not running, in FREEWHEEL,the
wheeldrive pins areplacedonly through

the holes in the wheel shaft (notthe wheel

hubs), thus allowing the wheelsto turn
freely when you manually movethe tiller.

Toplacethe wheels in WHEELDRIVEor
FREEWHEEL:

1. Stopengine,disconnectsparkplug wire

Figure3-2: WHEELDRIVEposition.

from sparkplug andallowengineto cool.

wheelhub (D,Figure3-2) and wheel

_ WARNING: Donotplace

tiller on its sidewhen changing

wheeldrivepositions. Doingso
could result in gasolineleaking
from the fuel tank.

Failureto follow this instruction
could result in personalinjury

or propertydamage.

2. Raiseone wheelabout oneinch off the
ground andplaceasturdy support under

the transmission.

shaft (B). Insert wheel drive pin (A)
through wheel hub (D)and wheel
shaft (B). Securewheeldrive pinwith hair-
pin cotter (C) by pushing hairpin cotter in
asfar as it will go. Repeatwith the other
wheeland then removethe support from

beneaththe transmission.

5. FORFREEWHEELMODE(Figure 3-3):
Slidethewheelinwardandinsertthewheel

drive pin (A, Figure3-3) onlythrough the
hole in the wheel shaft (B). Secure wheel

3. Removehairpin cotter (C,Figures3-2
and 3-3) from wheel drive pin (A).

4. FORWHEELDRIVEMODE(Figure3-2):
Slide wheel outward and align holes in

lO

drivepin with hairpincotter (C)bypushing
hairpin cotter in asfar asit will go. Repeat

for the other wheeland then removethe
support from beneath the transmission.