Troybilt 21A 643B711 User Manual REAR TINE TILLER Manuals And Guides L0601227

TROYBILT Rear Tine, Gas Tiller Manual L0601227 TROYBILT Rear Tine, Gas Tiller Owner's Manual, TROYBILT Rear Tine, Gas Tiller installation guides

User Manual: Troybilt 21A-643B711 21A-643B711 TROYBILT REAR-TINE TILLER - Manuals and Guides View the owners manual for your TROYBILT REAR-TINE TILLER #21A643B711. Home:Lawn & Garden Parts:Troybilt Parts:Troybilt REAR-TINE TILLER Manual

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Operator's Manual

Rear-tine Tiller Models

643C m Tuffy¢ /Bronco CRT

643B, 645A -- Super BroncoTM

Mode1645A Shown

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

Warning: This unit is equipped 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

PRINTEDIN U.S.A. FORMNO. 769-00585E.

11/11/05

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 24

Operation 12 Warranty Back Cover

FINDINGMODELNUMBER

This Operator's Manual is an important part of your new tiller. Itwill 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.

P. O. BOX 361131

www.troybilt.com CLEVELAND,OH44136

330-558-7220

866-840-6483_

Copy the model number here:

Copy the serial number here:

CUSTOMERSUPPORT

Please doNOTreturnthe unit to theretailer without firstcontactingCustomerSupport.

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.

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Iilo I1 II ff bl _ll i {_1 7 7fl ,

/)_,'_'_ ;<;W";; jiI_)7,/_;7

;J< /I+ 1_,7_ .............. ......

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If you prefer to reach a Customer Support Representative, please call 1(866) 840-6483.

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 sponsored bythe

Outdoor Power Equipment Institute, Inc.,

and is published bythe 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-

tive harm.

SafetyAlertSymbol

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

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.

ForwardClutchBail ReverseClutchControl

(Mode/s643B& 645A)

DepthRegulator

TineHoodFlap

Counter-Rotating-Tines

(CRT)

Drive Pin

Figure 1-1: Tiller featuresand contre/s. See separateEngine Owner'sManua/ to

identify enginecontre/s.

Training

1. Carefully readthis Own-

er's Manual,the separate

Engine Owner'sManual,

and any other literature you may receive.

Bethoroughly familiar with the controls

andthe proper use of the tiller and its en-

gine. Know how to stop the unit and disen-

gagethe controls quickly.

2. Neverallow childrento operatethe tiller.

Neverallow adults to operatethe tiller

without proper instruction.

3. Keepthe area of operation clear of all

persons, particularly children and pets.

4. Keepin mind that the operator or user is

responsible for accidents or hazardsoc-

curring to other people,their property,and

themselves.

Preparation

1. Thoroughly inspect the areawhere the

tiller is to be usedand removeall foreign

objects.

2. Be sure all tiller controls are released

and both wheelsare in the Wheel Drive po-

sition before starting the engine.

3. Donot operatethe tiller without wearing

adequateouter garments. Avoid loose gar-

ments or jewelry that could get caught in

moving parts.

4. Do not operatethe tiller when barefoot

or wearing sandals, sneakers,or light foot-

wear.Wear protective footwear that will

improve footing on slippery surfaces.

5. Do not till nearunderground electric ca-

bles, telephone lines, pipes or hoses. If in

doubt, contactyour telephone or utility

company.

6. Warning: Handlefuel with care; it is

highly flammable and its vapors areexplo-

sive. Takethe following precautions:

a. Store fuel in containers specifically

designed for this purpose.

b. Thegas capshall neverberemovedor

fueladdedwhiletheengineis running.

Allowthe engineto cool for several

minutes beforeaddingfuel.

c. Keepmatches, cigarettes, cigars,

pipes, openflames andsparks away

from the fuel tank and fuel container.

d. Fill fuel tank outdoors with extreme

care.Neverfill fuel tank indoors. Use

a funnel or spout to preventspillage.

e. Replaceall fuel tank and container

caps securely.

f. If fuel is spilled, do not attempt to

start the engine, but move the ma-

chine awayfrom the areaof spillage

and avoid creating any source of ig-

nition until fuel vapors havedissi-

pated.

7. Nevermakeadjustments when engineis

running (unless recommended by manu-

facturer).

Operation

1. Do not put hands or feet near or under

rotating parts.

2. Exerciseextreme caution when on or

crossing gravel drives, walks, or roads.

Stay alert for hidden hazardsor traffic.

3. After striking a foreign object, stop the

engine, removethe wire from the spark

plug wire and prevent it from touching the

spark plug. Thoroughly inspect the ma-

chine for any damageand repairthe dam-

agebefore restarting and operating the

machine.

4. Exercisecautionto avoid slipping or fall-

ing.

5.Iftheunitshouldstarttovibrateabnor-

mally,stoptheengine,disconnectthe

sparkplugwireandpreventitfromtouch-

ingthesparkplug,andcheckimmediately

forthecause.Vibrationisgenerallya

warningoftrouble.

6.Stoptheengine,disconnectthespark

plugwireandpreventitfromtouchingthe

sparkplug,wheneveryouleavetheoperat-

ingposition,beforeuncloggingthetines,

orwhenmakinganyrepairs,adjustments

orinspections.

7.Takeallpossibleprecautionswhenleav-

ingthemachineunattended.Stoptheen-

gine.Disconnectthesparkplugwireand

moveitawayfromthesparkplug.Besure

thatbothwheelsareintheWheelDrivepo-

sition.

8.Beforecleaning,repairing,orinspect-

ing,stoptheengineandmakecertainall

movingpartshavestopped.Disconnect

thesparkplugwireandpreventitfrom

touchingthesparkplugtopreventacci-

dentalstarting.

9.Theflaponthetinehoodmustbedown

whenoperatingthetiller.

10.Neverusethetillerunlessproper

guards,plates,orothersafetyprotective

devicesareinplace.

11.Donotruntheengineinanenclosed

area.Engineexhaustcontainscarbon

monoxidegas,adeadlypoisonthatis

odorless,colorless,andtasteless.

12.Keepchildrenandpetsaway.

13. Neveroperatethe tiller underengine

powerif thewheels are in the Freewheel

position. In the Freewheelposition, the

wheelswill not hold the tiller back andthe

revolvingtines could propel the tiller rapid-

ly,possibly causingloss of control. Always

engagethe wheels with the wheel drive

pins in the Wheel Drive position before

starting the engine or engaging the

tines_vheelswith the Forward Clutch Bail

(all models) or the ReverseClutch control

(Models 643B & 645A only).

14. Be aware that the tiller may unex-

pectedlybounceupwardor jumpforward

if the tines shouldstrike extremelyhard

packedsoil, frozen ground,or buried ob-

stacleslike large stones, roots,or

stumps.

If indoubtaboutthe tilling conditions,al-

ways usethe following operating precau-

tionsto assistyouin maintainingcontrol

of the tiller:

a. Walk behindandto one side of the

tiller, usingone handon the handle

barsRelax yourarm, but use a

securehandgrip.

b. Use shallower depthregulator

settings,working graduallydeeper

with each pass.

c. Use slower enginespeeds.

d. Clear the tilling area of all large

stones, rootsor other debris.

e. Avoidusingdownwardpressureon

the handlebars. If needbe, use

slight upwardpressureto keep the

tinesfrom diggingtoodeeply.

f. Beforecontacting hard packedsoil

at the endof a row, reduce engine

speedand lift the handlebarsto

raise the tines out of the soil.

g. In an emergency, stopthe tinesand

wheels by releasing whichever

clutch controlis engaged.Do not

attemptto restrainthe tiller.

15. Do not overloadthe tiller's capacityby

attempting to till too deeply at too fast a

rate.

16. Neveroperate the tiller at high trans-

port speeds on hard or slippery surfaces.

Look behind and usecare when backing

up.

17. Donot operatethe tiller on aslope that

is too steep for safety.When on slopes,

slow down and makesure you have good

footing. Neverpermit thetiller to freewheel

down slopes.

18. Neverallow bystanders nearthe unit.

19. Onlyuse attachmentsand accessories

that are approved by the manufacturer of

the tiller.

20. Usetiller attachmentsand accessories

when recommended.

21. Neveroperatethe tiller without good

visibility or light.

22. Neveroperatethe tiller if you aretired;

or underthe influence of alcohol, drugs or

medication.

23. Operatorsshall not tamper with the en-

gine-governor settings onthe machine;

the governor controls the maximum safe

operating speed to protect the engine and

all moving parts from damagecaused by

overspeed.Authorized service shall be

sought if a problem exists.

24. Do not touch engine parts which may

behot from operation.Let parts cool down

sufficiently.

25. Pleaseremember:Youcan alwaysstop

the tines and wheels by releasingthe For-

ward Clutch Bailor on Models 643B &

645Athe ReverseClutch control, (which-

evercontrol is engaged),or by moving the

ignition switch and/orthrottle control lever

on the engineto "OFF" or "STOP".

26. To load or unloadthe tiller, seethe in-

structions in Section4 of this Manual.

27. Useextreme caution when reversing

or pulling the machinetowards you.

28. Startthe enginecarefully accordingto

instructions and with feet well away from

the tines.

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 besure the equipment

is in safeworking condition.

3. Neverstore the tiller with fuel in the fuel

tank inside abuilding where ignition sourc-

esare presentsuchas hot waterandspace

heaters, furnaces, clothes dryers, stoves,

electric motors, etc.). Allow the engine to

cool before storing the unit in any enclo-

sure.

4. To reducethe chances of a fire hazard,

keepthe enginefree of grass, leaves,or ex-

cessivegrease.

5. Store gasoline in acool, well-ventilated

area, safely awayfrom any spark- or

flame-producing equipment. Store gaso-

line in an approved container, safely away

from the reachof children.

6. Referto the Maintenancesections of

this Manual and the separateEngineOwn-

er's Manual for instructions if the unit is to

bestored for an extendedperiod.

7. Neverperform maintenancewhile the

engineis running orthe spark plug wire is

connected,except when specifically in-

structed to do so.

8. Ifthe fuel tank hasto be drained, dothis

outdoors.

Decals

For your safety and the safety of others, vari-

ous safety and operational decalsare located

on your unit (seeFigure 1-2).

Keepthe decalsclean and legible at all times.

Contactyour local service dealeror thefactory

for replacementsif any decalsaredamagedor

missing.

Referto the Parts List pagesin this Manualfor

decal locations, descriptions and part num-

bers.

Forward Clutch Bail

StartingStabilization

Message(on engine)

ReverseClutch Control

OperatingInstruction

_(Models 643B& 645A

WarningMessages

Hot Surfaces Warning

Figure 1-2: Locationof safety and operatingdeca/s.

Operating Symbols

Varioussymbols(shownhere,_dthworddescrip'dons)

maybeusedonte'dllerandengine.

NOTE:YourunihT_ynothaveallof_esymbols.

FAST SLOW STOP

I"1 I*1 R

CHOKE CHOKE REVERSE

ON OFF ROTATINGTINES

TILLERDIRECTION

<--o-->

LEVERDIRECTION

BAIL

ENGAGED BAIL

DISENGAGED

TO AVOID SERIOUS INJURY:

* READTHEOWNER'SMANUAL.

* KNOWLOCATIONSAND FUNCTIONSOFALLCONTROLS.

* KEEPALLSAFETYDEVICESANDSHIELDSIN PLACEAND WORKING.

. NEVERALLOWCHILDRENORUNINSTRUCTEDADULTSTO OPERATETILLER.

° SHUTOFFENGINEAND DISCONNECTSPARKPLUGWIREBEFOREMANUALLYUN-

CLOGGINGTINES ORMAKINGREPAIRS.

° KEEPBYSTANDERSAWAYFROM MACHINE.

° KEEPAWAYFROM ROTATINGPARTS.

° USEEXTREMECAUTIONWHEN REVERSINGOR PULLINGTHE MACHINETOWARDS

YOU.

SECTION2: ASSEMBLY

WARNING: Toprevent

personal injury or property

damage,do not start the engine

until all assemblysteps are

complete andyou have read

and understandthe safety and

operating instructions in this

manual.

INTRODUCTION

Carefully follow these assemblysteps to

correctly prepareyour tiller for use. It is

recommendedthatyou readthis Sectionin

its entirety before beginning assembly.

NOTE: Various tiller models are

presented in this Manual. Use only the

information appropriate for your tiller

model. Engine styles vary by model, Your

engine may appear differently than those

illustrated in this manual.

INSPECTUNIT

Inspect the unit and 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 mail a copyto the carrier within 15

days after the unit has beendelivered.

ContactTroy-Bilt LLCif you needassis-

tance in this matter.

TOOLS/MATERIALSNEEDED

(2) 1/2" open-end wrench*

(2) 9/16" open-endwrench*

(1) 3/8" open-endwrench*

(1) Largeadjustable wrench

(Models 643B & 645A only)

(1) Scissors (to trim plastic ties)

(1) Ruler (for belt tension check)

(1) Block of wood (to support tiller when

removing wheels)

(1) Tire pressure gauge (for models with

pneumatic tires)

(1) Cleanoil funnel

(1) Motor oil. Refertothe EngineOwner's

Manualfor oil specificationsand

quantity required.

* Adjustable wrenches may be used.

ASSEMBLYSTEPS

STEP 1: UNPACKING INSTRUCTIONS

NOTE:While unpacking, do not severely

bend any control cables.

1. The tiller weighs approximately 133 Ibs.

Do not attempt to remove it from the ship-

ping platform until instructed to do so in

these Assembly steps.

2. Removeany packagingmaterial from

the carton. Removeany staples from the

bottom of the carton and removethe car-

ton from the shipping platform.

3. Removeall unassembled parts andthe

separatehardware bag from the carton.

Checkthat you havethe items listed in the

Loose Parts List (contactyour local dealer

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

1HandlebarSupport (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"

4Split lock washer,5/16"

4 Hex nut, 5/16"-18

2 HexIocknut,3_8"-16

*Models 643B & 645A only

IMPORTANT: Motor oil must beaddedto

the enginecrankcasebefore the engine is

started. Followthe instructions inthis

Sectionand in the separateEngine

Owner's Manual.

NOTE: LEFTand RIGHTsides of the tiller

are as viewedfrom the operator's position

behind the handlebars.

STEP 2: ATTACHHANDLEBAR

1. Looselyattachthe legs of the handlebar

support (A, Fig. 2-2) to the inner sides of

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

hd. screws (B), 3/8" flat washers, and3/8"-

16 hex Iocknuts.

_iiii

Figure2-1: Toidentifylengthofscrews,place

screwontemplateasshownandmeasuredis-

tancebetweenbottomofscrewheadandtipof

screw.

2. Usingtwo 5/16"-18x 1-1/2"screws (C),

5/16"split lock washers (D) and 5/16"-18

hex nuts (G), loosely attach the handlebar

support (A) using the upperholes.Tighten

the two screws securely.

3. Therearethree height adjustment holes

in the two handlebar support brackets (E

and F,Fig. 2-2). Usea setting that will po-

sition the handlebarsat approximately

waist levelwhen the tines are3"-4" into the

soil. Looselyattachthe support bracketsto

the outsideof the handlebarassembly (I)

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

16"split lockwashers (D) and5/16"-18 hex

nuts (G). NOTE:If asupport bracket will

not move, loosen attaching screw (H) and

nut.

IMPORTANT:The support bracketsmust

beassembled to the outside of the

handlebarassembly.

4. Tightenall handlebarmounting hard-

ware securely.

STEP 3: MOVE TILLER OFF CRATE

To roll the tiller off the shipping platform,

put the wheels in freewheel, as follows:

1. Placeasturdy block underthe transmis-

sion to raise one wheel about 1" off the

ground.

2. Removethe Klik Pin (J, Fig. 2-3) from

the wheel hub (K) and wheel shaft (L).

3. Slidethe wheelfully inward onthe wheel

shaft (N,Fig. 2-3). Reinstallthe Klik pin (J)

The supportbracketsmust

be assembledto the outside

of the handlebarassembly.

Fig.2-3: Wheelin FREEWHEELposition

(wheeldrivepin throughwheelshaftonly).

STEP 4: INSTALL FORWARD

CLUTCH CABLE

1. Carefully unwrap the forward clutch ca-

ble(cable without an attached knob) from

its shipping position and slide the thin ca-

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

blebracket. Push the cable connector (N,

Fig.2-4) upthrough the holein the bracket

until the groove in the connector snaps

into place.

2. Threadthe #10-24 hex nut (Z, Fig. 2-5)

halfway onto the screw (V) which runs

through the spring (W, Fig. 2-5).

3. Threadthe screw (V) into the cable ad-

juster (X).

Fig. 2.2: Attachhandlebar.

through the wheel shaft (L) only (not

through the wheel hub). The wheelshould

now spin freely (freewheel)on the wheel

shaft. Repeatwith the other wheel.

4. Usethe handlebarto roll the tiller to a

flat area.

IMPORTANT: Beforestarting the engine,

the wheels must beplaced in the WHEEL

DRIVEposition (pins through wheel hubs

andwheel shaft). This procedure is

described in WheelDrivePins on page 10.

Fig. 2-4:/nstal/ing forward clutchcable bracketand cable.

4. Checkfor correct tension onthe forward

drive belt by taking two measurements of

the cable spring, as follows:

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

6) in an open (released)position, measure

the length of the cable spring (W) from the

outermost coil to the outermost coil.

b. Squeezethe ForwardClutch Bailagainst

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

sure the spring length. The belt tension is

correct if this second measurementis be-

tween 1/16" to 3/16" longer than the first

measurement. If so, turn the hex nut (Z,

Fig. 2-7) tightly against the cable adjuster

(X) while preventing the cable adjuster

from turning.

c. If the spring length is incorrect, you

must adjustthe cabletension as described

in Checkingand Adjusting Forward Drive

Belt Tensionin Section 5. 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).

Fig.2-5: Cable

springand

adjuster.

Fig. 2-6: Attachforward

clutchcable spring to

forwardclutch bail

iiiiiiiiiiiiiiii

Fig. 2-7: Tocheckforwardbelt tension, take twomeasurementsof thelengthof the coilsin the

spring-- first withthebah open, then withthe bah held against thehandlebar.

STEP 5: INSTALL REVERSECLUTCH

CABLE(MODELS643BAND 645A ONLY)

1. Unwrapthe reverseclutch cable (CC,

Fig.2-8 and Fig.2-9) from its shipping po-

sition and route it up to the handlebar. Be

sure that the cable is routed beneaththe

Forward Clutch Bail.

2. Insertthe cable(CC,Fig.2-8)through the

slot inthe cablebracketandpositionthe flat

side of the threadedassemblynextto the

flat side of the hole. Slidethe hex nut (DD)

up the cable andtighten it securely.

3. Fastenthe reverseclutch cable to the

left side handlebarwith acabletie (EE,Fig.

2-9).

4. Testthe function ofthe reverseclutch by

pulling out and releasingthe cable knob.

The knob should return to its neutral posi-

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

contact your local dealeror Troy-Bilt LLC

for technical assistance.

Flat Side

Fig. 2-8: Install reverse cable bracketand

reverse clutchcable.

Fig. 2-9: Route reverse clutchcable (CC)as

shown. Attachwithcable tie (EE).

5! =-P6: CHECKTRAHSMiSSiOH

OILLEVEL

Thetransmission was filled with gearoil at

the factory. However,you should checkthe

gear oil level at this time to makecertain it

is correct.

IMPORTANT:Donot operatethe tiller if the

gear oil level is low. Doing so will result in

severedamageto the transmission com-

ponents.

1. With the tiller on level ground, pull the

Depth RegulatorLever (FF,Fig. 2-10) back

andthen all the way up until the lowest

notch in the lever is engaged.

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 if the gear oil

is approximately halfway upthe side of the

main drive shaft.

4. Ifthe oil level is low, add gear oil by re-

ferring to A, ToCheckthe Transmission

GearOil Level in Section5.

I El."/: AUU IVlUI UH UIL

Thetiller is shipped withoutoil in the en-

gine.

IMPORTANT:Do not start the engine with-

out first adding motor oil. Severeengine

damagewill result if the engineis run with-

out oil.

1. Referto the separateEngineOwner's

Manual for engine oil specifications and

capacities.

2. With the tiller on levelground, movethe

Depth RegulatorLever(FF,Fig.2-10) up or

down until the engine is level.

3. Add motor oil as describedin the En-

gine Owner's Manual.

4. Movethe DepthRegulator Lever all the

way down until the highest notch is en-

gaged.This placesthe tines in the "travel"

position, which allows the tiller to be

moved without the tines touching the

ground.

_I L:I."8: L;Ht:L;KHAHUWAHt:

Checkall nuts and screws for tightness.

STEP 9: CHECKAIR PRESSURE IN

TIRES (units with pneumatic tires)

Checkthe air pressurewith a tire gauge.

Deflateor inflatethe tires equally to be-

tween 15 PSiand 20 PSi (pounds per

square inch). Besure that both tires arein-

flated equally or the unit will pull to one

side.

Fig. 2-10: AdjustDepth Regu/atorLever.

Fig. 2-11: Removegear oil fill plug.

IMPORTANT: This completesthe assembly steps. Be-

fore operatingyour tiller, makesureyou readthe follow-

ing sections in this Manual,as well as the

separateEngineOwner'sManual:

• Section 1: Safety

• Section 3: Featuresand Controls

• Section 4: Operation

SECTION3: FEATURESANDCONTROLS

_ ARNING: Before

operating your machine,

carefully readand understand

all safety, controls and

operating instructions 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 describes the location and

function of the controls onyour tiller. Refer

to the following Section, Operationfor de-

tailed operating instructions.

Practice using these controls, with the en-

gine shut off, until you understandthe op-

eration of the controls and feel confident

with each of them.

Forward Clutch ReverseClutchControl

(Models643B& 645A)

Regulator

HeightAdjustment

Wheel Drive Pin

(oneachwheel)

ENGINE CONTROLS

Referto the enginemanufacturer's Engine

Owner's Manual (included in the tiller liter-

ature package)to identify the controls on

your engine.

IMPORTANT:Thecontrol for stopping the

engine is located onthe engine.

WHEEL DRIVE PINS

Eachwheel is equippedwith a wheel drive

Klik pin (A, Figures3-2 and 3-3) that se-

curesthe wheelto the wheel shaft (B). The

wheelscan be positioned in either a

WHEELDRIVEor a FREEWHEELmode.

_ WARNING: Neverallow

either of the wheelsto bein the

FREEWHEELposition when the

engineis running. Always put

both wheelsin the WHEEL

DRIVEposition before starting

the engine.

Failureto comply could cause

loss of tiller control, property

damage,or personal injury.

Beforestarting the engine,put both wheels

in the WHEELDRIVEposition by inserting

the wheel drive Klik pins through the wheel

hubs andthe wheel shaft. Doingso "locks"

the wheels to the wheel shaft, causing the

wheelsto turn when either the

Figure 3-1: Tiller features and controls. See separateEngine Owner's Manual to identify

enginecontrols.

Forward Clutch Bail (all models) or the Re-

verse Clutch Control (Models 643B &

645A) is engaged.

Usethe FREEWHEELmode only when the

engineis not running. In FREEWHEEL,the

wheel drive pins are placed only through

the holes in the wheel shaft (not the wheel

hubs), thus allowing the wheels to turn

freely when you manually movethe tiller.

Toplacethe wheels in WHEELDRIVEor

FREEWHEEL:

1. Stop engine,disconnectsparkplug wire

from sparkplug andallow engineto cool.

_ WARNING: Donotplace

tiller on its side when changing

wheel drive positions. Doing so

could result in gasoline leaking

from the fuel tank.

Failureto follow this instruction

could result in personal injury

or property damage.

2. Raiseone wheel about one inch off the

ground and place asturdy support under

the transmission.

3. RemoveKlick Pin (A, Figures3-2 and 3-

3) from wheel drive shaft (B).

4. FORWHEELDRIVEMODE(Figure3-2):

Slide wheel outward andalign holes in

Figure3-2: WHEELDRIVEposition.

wheel hub (D, Figure 3-2) and wheel

shaft (B). Insert Klik pin (A) through wheel

hub (C) and wheel shaft (B). Repeatwith

the other wheel andthen removethe sup-

port from beneaththe transmission.

5. FORFREEWHEELMODE(Figure 3-3):

Slide the wheel inward and insert the Klik

pin (A, Figure3-3) onlythrough the hole in

the wheel shaft (B). Repeatfor the other

wheel and then removethe support from

beneaththe transmission.

Figure 3-3: FREEWHEELposition.

WARNING: Beforestarting

engine, besure that both

wheelsare in WHEELDRIVE

position. SeeWheelsDrivePins

for instructions.

Engagingthe Forward Clutch

Bail or ReverseClutch Control

(if equipped) when the wheels

arenot in WHEELDRIVEcould

allow the tinesto rapidly propel

the tiller forward or backward.

Failureto comply could cause

loss of tiller control, property

damage,or personal injury.

FORWARDCLUTCHBAIL

The Forward Clutch Bail (D, Figure3-4)

controls the engagementof forward drive

to the wheelsand tines.

Tooperatethe ForwardClutchBail:

1. Put wheelsin WHEELDRIVEposition

(see "WARNING"statement above).

2. Lift and holdthe clutch bail (D, Figure 3-

4) againstthe handlebarto start the wheels

andtines rotating in a forward direction.

3. Releasethe clutch bail to disengage

(stop) the wheels andtines (the enginewill

continue to run).

REVERSECLUTCHCONTROL

(Models 643B & 645A only)

The ReverseClutch Control (E, Figure3-4)

controls the engagementof reversedrive

to the wheelsandtines. The reversingfea-

ture is used for maneuvering the tiller

only-- never engage the tines in the

ground while operatingin reverse.

WARNING: Useextreme

caution when reversing or

pulling the machinetowards

you. Look behindto avoid

obstacles.

Neverattemptto till in reverse.

Failureto follow this warning

could result in personal injury

or property damage.

Tooperatethe Reverse ClutchControl:

1. Put wheels in WHEELDRIVEposition

(see "WARNING"statement at the left).

2. Stop all tiller motion by releasingthe

Forward Clutch Bail.

3. Lift the handlebar until the tines clear

the ground, look behind you to avoid any

obstacles, and then pull the control knob

(E, Figure3-4) out. The wheels andtines

will rotate in a reversedirection.

4. Releasethe control knob to disengage

(stop) the wheels andtines (the enginewill

continue to run).

Figure3-4:All modelshaveaForwardClutch

Bail(E). OnlyModel634,4haveaReverse

ClutchCentre/(F).

DEPTHREGULATORLEVER

Thislever (F,Figure3-5) controls the tilling

depth of the tines. Pull the lever back and

slide it up or down to engagethe notched

height settings.

The"travel position" (highestnotch) raises

the tines approximately1-1/2"off the

ground, allowing the tiller to bemoved

without the tines contacting the ground.

This setting should also be used when

starting the engine.

Moving the lever upward will increasethe

tilling depth.The lowest notch allows a till-

ing depth of approximately6", depending

on soil conditions. For best results,always

begintilling at avery shallow depth setting

and gradually increasethe tilling depth.

WARNING: Donot attempt

to till too deeplytoo quickly.

Graduallywork down to deeper

tilling depths.

Placethe DepthRegulator

Lever in the "travel" position

before starting the engine. This

position prevents thetines from

touching the ground until you

are readyto begintilling.

Failureto follow this warning

could result in personalinjury

or property damage.

Travel Position

Figure3-5: Depth RegulatorLever (G).

HANDLEBARHEIGHT ADJUSTMENT

Thehandlebarheight is adjustableto three

different settings (Figure 3-6). In general,

adjust the handlebars so they areat waist

level when the tines are3"-4" in the soil.

Toadjust the handlebars:

1. Stop engine, disconnectspark plugwire

from spark plug and allow engineto cool.

2. Remove hardware,reposition handle-

bars,and reinstall hardware securely.

High

Medium

Figure3-6: Handlebarheightadjustment.

SECTION4: OPERATION

_ARNING: Before

operating your machine,

carefully readand understand

all safety (Section 1), controls

(Section 3) and operating

instructions (Section4) inthis

Manual,the separateEngine

Owner's Manual,and on the

decalson the machine.

Failureto follow these

instructions can result in

serious personal injury.

INTRODUCTION

Readthis OperationSection andthe sepa-

rate EngineOwner's Manual before you

start the engine. Then,take the time to fa-

miliarize yourself with the basic operation

of the tiller before using it in the garden.

Findan open, level areaand practice using

the tiller controls without the tines engag-

ing the soil (put tines in "travel" setting).

Only after you've becomecompletely fa-

miliar with the tiller should you beginusing

it in the garden.

BREAK-INOPERATION

Perform the following maintenance after

the first two (2) hours of new operation

(see MaintenanceSection in this manual

and in the Engine Owner'sManual).

1. Changeengine oil.

2. Checkfor loose or missing hardware on

unit. Tighten or replaceas needed.

3. Checktension on forward drive belt.

4. Checktransmission gear oil level.

STARTINGANDSTOPPING

Pre-StartChecklist

With the spark plug wire disconnected

from the sparkplug, perform the following

checksand services before each use:

1. Readthe Safetyand Controls Sections

in this manual. Readthe separateEngine

Owner's Manual provided with the unit.

2. Putthe wheels inthe WHEELDRIVEpo-

sition (wheel pins must be through holes

in wheel hubs and wheel shaft).

3. Checkunit for loose or missing hard-

ware. Serviceas required.

4. Checkengineoil level.SeeEngineOwn-

er's Manual.

ReverseClutchControl

(Mode/s643B&

ClutchBail DepthRegulator

DrivePin

Fig. 4-1

5. Checkthat all safety guards andcovers

are in place.

6. Checkair cleanerand engine cooling

system. SeeEngineOwner's Manual.

_ WARNING: GASOLINEIS

HIGHLYFLAMMABLEAND ITS

VAPORSAREEXPLOSIVE.

Followgasoline safety rules in

this Manual (seeSection 1)and

in the separateEngineOwner's

Manual.

Failureto follow gasoline safety

instructions can result in

serious personal injury and

property damage.

7. Fill the fuel tank with gasoline according

to the directions inthe separate Engine

Owner's Manual.Follow all instructions

and safety rules carefully.

8. Attach spark plug wire to spark plug.

Startingthe Engine

The following steps describe how to start

and stop the engine.

_ WARNING: Donotattempt

to engagethe tines or wheels

until you have readall of the

operating instructions in this

Section. Also, reviewthe safety

rules in Section 1: Safety,and

the tiller and enginecontrols

information in Section3:

Featuresand Controls.

1. Completethe Pre-StartCheckliston this

page.

2. Putthe wheels inthe WHEELDRIVEpo-

sition (see WheelDrivePinsin Section3 of

this manual).

,_ WARNING: Tohelp

preventserious personal injury

or damageto equipment:

•Before starting engine, put both

wheels in the WHEELDRIVE position.

Never have wheels in FREEWHEELpo-

sition when engine is running. When

the wheels are in FREEWHEEL,they do

not hold back the tiller and the tines

couldpropel the tiller rapidly

forwardor backward.

•Before starting engine, put Forward

Clutch Bail (all models) and Reverse

Clutch Control (Models 643B &645A

only) in neutral (disengaged)positions

by releasing levers.

• Never run engine indoors or in en-

closed,poorlyventilatedareas. Engine

exhaustcontainscarbonmonoxide,an

odorlessanddeadlygas.

•Avoidenginemuffler andnearbyareas.

Temperaturesin these areas may ex-

ceed 150° F.

3. Movethe Depth RegulatorLever all the

way down to the "travel" position, so that

the tines clear the ground.

4. Releaseall controls on the tiller.

5. Onengine's with a fuel shut-off valve,

turn valve to openposition, as instructed

in the separateEngine Owner'sManual.

6. Put ignition switch and/or throttle con-

trol lever located on engine in the "ON",

"RUN", "FAST"or "START"position, as in-

structed in the EngineOwner's Manual.

7. Chokeor prime engine,as instructed in

EngineOwner's Manual.

8. Put one hand on fuel tank to stabilize

unit when pulling starter ropehandle.Then

use recoil starter to start engine, as in-

structed in the EngineOwner's Manual.

Whenenginestarts, gradually move choke

lever (if so equipped) to "NO CHOKE",

"CHOKEOFF"or "RUN" position.

9. Usethe "FAST"throttle speed setting

when tilling.

Stopping the Engineand Tiller

1. Tostop the wheelsandtines, releasethe

Forward Clutch Bail (all models) orthe Re-

verse Clutch Control (Models 643B &

645A) -- whichever control is in use.

2. Tostop the engine, put the ignition

switch and/or the throttle control lever in

the "OFF"or "STOP"position.

OPERATINGTHE TILLER

Thefollowing operating instructions pro-

vide guidelines to using your tiller effec-

tively and safely. Besure to read Tilling

Tips & Techniquesin this Section before

actually putting the tines into the soil.

This is a "Counter-Rotating-Tine" (CRT)

tiller. It operatesdifferently from "Stan-

dard-Rotating-Tine" (SRT)tillers. As the

wheels pull forward, the tines rotate back-

ward, creating an "uppercut" action which

digs deeply, uprooting soil and weeds.

1. Followthe Pre-Start Checklistat the be-

ginning of this Section. Besure that the

wheelsare in the WHEELDRIVEposition.

2. Movethe DepthRegulator Lever all the

way down, so that the tines clear the

ground. Usethis position when practicing

with the tiller and when traveling between

tilling sites. Beforeactually tilling, move

the lever to the desired depth setting (see

Tilling Tips & Techniques).

Fig.4-2: Useonehandtoguidetiller when

movingforward.

3. Start engineand allow it to warm up.

Then put throttle in "FAST"setting.

4. For forwardmotion of the wheels and

power to the tines:

(a) Pull Forward Clutch Bail (Fig.4-1) up

against handlebar.Releasebail to stop for-

ward motion of wheels and tines.

(b) When tilling, relaxand let the wheels

pull the unit while the tines dig. Walk be-

hind anda little to oneside of the unit. Use

one hand, yet keepa light--but secure--

grip on the handlebar (while keepingyour

arm loose). SeeFig.4-2. Let the unit move

at its own paceand do not push down on

the handlebarsto try and forcethe tines to

dig deeper-- this takes weight off the

wheelsand reducestraction.

,_ WARNING: Donotpush

down onthe handlebarsto try

to makethe tiller till more

deeply.This prevents the

wheelsfrom holding the tiller

backand can allow the tines to

rapidly propelthe tiller forward,

which could resultin loss of

control, property damage,or

personal injury.

5. For reverse motion of the wheelsand

tines (Models 643B & 645A only):

(a) Look behindand exercisecaution when

operating in reverse.Do not till while in

reverse.

(b) Stop all forward motion. Lift handlebar

with one handuntil tines areoff the ground

andthen pull ReverseClutch Control knob

out (see Fig.4-3). Tostop reversing, let go

of ReverseClutch Control knob.

(b) Swing the handlebarto the left so the

right wheeltakes a "step" backward.Next

swing the handlebarto the right so the left

wheel"steps" backward.Repeatas needed.

in reverse,shut off the engine, then place

the two wheels in FREEWHEEL.

7. ToTurn the Tiller Around:

(a) Practiceturning the tiller in a level,

openarea.Beverycarefulto keepyour feet

and legs away from the tines.

(b) Tobeginaturn, lift the handlebarsuntil

thetinesareout ofthe groundandtheengine

andtinesarebalancedoverthe wheels(Fig.

4-4).

handlebarto steer in direction of turn (Fig.

4-5). After turning, slowly lower tines into

soil to resumetilling.

Fig.4-3: Raisetinesoffgreundandlook

behindwhenmovinginreverse.

6. To movethe Model 643C in reversefor

short distances:

(a) Releaseforward Clutch Bail.Then lift

handlebaruntil tines are off the ground.

Fig. 4-4: Tobegin turn, lift handlebars until

tines are outof groundand unit is balanced.

Fig. 4-5: With tines out of greund,push han-

dlebars sidewaysto turn tiller.

Stoppingthe Tiller andEngine

1. Tostop the wheelsandtines, releasethe

Forward Clutch Bail (all models) orthe Re-

verse Clutch Control (Models 643B &

645A) -- whichever control is in use.

2. Tostop the engine, put the ignition

switch and/orthe throttle control lever in

the "OFF"or "STOP"position.

TILLINGTIPS& TECHNIQUES

Tilling Depths

WAHNING: Before

tilling, contact your

telephone or utilities

company and inquire if

undergroundequipment or

lines are usedon your

property. Do not till near

buriedelectric cables,

telephone lines, pipes or

hoses.

This is a CRT(counter-rotatingtine) tiller. As the wheelspullforward, the tinesrotateback-

ward. Thiscreatesan "uppercut" tine actionwhich digs deeply,uprooting soil and weeds.

Don't overloadthe engine,but dig as deeplyas possibleon eachpass. Onlater passes,the

wheelsmaytendto spinin thesoft dirt. Helpthemalongby lifting upslightly onthehandlebar

(onehand,palm up,works most easily).

Avoidthe temptationto push down on the handlebarsinan attemptto force thetiller to dig

deeper.Doingso takesthe weightoff the poweredwheels,causingthemto lose traction.

Withoutthe wheelsto holdthe tiller back,the tineswill attemptto propelthe tiller backward,

towardsthe operator.(Sometimes,slightdownwardpressureonthe handlebarswill helpget

througha particularlytough sectionof sod or unbrokenground, but in most casesthiswon't

benecessary.)

• Whencultivating(breakingup surfacesoil aroundplantsto destroyweeds,seeFig.4-9), ajust the tinesto dig only 1"to 2" deep.Using

shallowtilling depthshelps preventinjury to plantswhoseroots often grow close to the surface.If needed,lift up on the handlebars

slightly to preventthe tinesfrom diggingtoo deeply.(Cultivatingona regularbasisnot only eliminatesweeds,it alsoloosensandaerates

thesoil for bettermoistureabsorptionandfaster plantgrowth.) Wateringthegardenareaafewdayspriorto tilling will maketilling easier,

aswill lettingthe newlyworkedsoil setfor a dayor two beforemakinga final, deeptilling pass.

ChoosingCorrectWheel & TineSpeeds With experience,you will find the "just right" tilling depth andtilling speedcombination

that is bestfor your garden.

Setthe enginethrottle leverat a speedto givethe engineadequatepowerandyetallow it to operateat the slowestpossiblespeed...atleast

until you haveachievedthe maximumtilling depth you desire.Fasterenginespeedsmay be desirablewhen makingfinal passesthrough

the seedbedor whencultivating. Selectionof the correct enginespeed,in relationto the tilling depth,will ensurea sufficientpower levelto

do the jobwithout causingthe engineto labor.

Letthe Tiller Dothe Work

Whiletilling, relaxandletthe wheelspullthe

tiller along while the tines do the digging.

Walkon the side that is not yet finished(to

avoid makingfootprints in the freshly tilled

soil) and lightly, but securelygrip the han-

dlebarwith just onehand.

AvoidMaking Footprints

Wheneverpossible, walk on the untilled

sideof the unit to avoid makingfootprints in

your freshly tilled or cultivated soil. Foot-

prints causesoil compactionthat can ham-

per root penetrationand contribute to soil

erosion. They can also "plant" unwanted

weed seeds back into the freshly tilled

ground.

AvoidTilling Soggy, Wet Soil

Tilling wet soil often results in large,hard

clumps of soil that can interferewith plant-

ing. If time permits,wait a day or two after

heavyrains to allow the soil to dry before

tilling. Testsoil by squeezingit into a ball. If

it compressestoo easily,it is too wetto till.

Preparing Seedbeds

• Whenpreparingaseedbed,go overthe samepathtwice inthefirst row,then over-

lapone-halfthetiller width onthe rest of the passes(seeFig.6). Whenfinishedin

onedirection, makea secondpassat a right angle,as shownin Fig.4-7. Overlap

eachpassfor best results (invery hardground, it maytakethree or four passesto

thoroughlypulverizethe soil.)

Fig. 4-6 Fig. 4-7

• If the gardensizewill not permitlengthwiseandthencrosswisetilling, then over-

lapthefirst passesby one-halfatiller

width,followedby successivepasses ....................v .................................

at one-quarterwidth (seeFig.4-8). _ _

Fig. 4-8

Cultivating

With planning, you can =,,_r,_, ..,'q r_

allow enoughroom _" _ (_

betweenrows to cultivate _ _

(seeFig.4-9). Leaveroom _ _

for the hood width,

plus enough extra _ _'

room for future plant Fig.4-9

growth.

TILLINGTIPS& TECHNIQUES(CON'T)

TillingOnSlopes

Readthe followingrecommendationsbeforetilling onslopes:

Ifyou must gardenon a moderateslope,pleasefollow two very importantguidelines:

1. Till only on moderateslopes,neveronsteepgroundwherefooting is difficult (reviewsafe-

ty rulesin Section1: Safetyof this manual).

2. We recommendtilling up and down slopes ratherthan terracing. Tilling vertically on a

slopeallows maximumplantingareaandalso leavesroom for cultivating.

IMPORTANT:Whentilling onslopes, besurethe correct oil levelis maintainedin the engine

(checkeveryone-half hour of operation).The inclineof the slopewill causethe oil to slant

awayfrom its normal levelandthis can starveenginepartsof requiredlubrication. Keepthe

motor oil levelat the full point at all times!

WAHNING: Do not

operatetiller on aslope too

steepfor safe operation.Till

slowly and besure you have

good footing. Neverpermit

tiller to freewheeldown

slopes. Failureto follow this

warning could result in

personal injury.

Tilling Upand DownSlopes(Vertical Tilling)

•To keepsoil erosionto aminimum, besureto addenoughorganicmatterto the soil sothat it has goodmoisture-holdingtexture andtry

to avoid leavingfootprints or wheelmarks.

• Whentilling vertically,tryto makethe first passuphillas thetiller digs moredeeplygoing uphillthan it doesdownhill.In soft soil or weeds,

you mayhaveto lift the handlebarsslightly while going uphill. Whengoingdownhill, overlapthe first passby about one-halfthe width of

the tiller.

Clearingthe Tines

Thetines have a self-clearing action which eliminates most tangling of debris in the

tines. However,occasionally dry grass, stringy stalks or tough vines maybecome tan-

gled. Follow these proceduresto help avoid tangling and to cleanthe tines, if neces-

sary.

•To reducetangling, set the depth regulator deep enoughto get maximum "chopping"

action as the tines chop the material against the ground. Also, try to till under crop

residues or cover crops while they are green, moist and tender.

• While tilling, try swaying the handlebars from side to side (about 6" to 12"). This

"fishtailing" action often clearsthe tines of debris.

• If tangling occurs, lift the tines out of the soil and run the tiller in reverse (if unit is

equippedwith powered reverse) for a few feet. This reversing action should unwind a

good deal of debris.

• It may benecessaryto remove the debris by hand(a

pocket knifewill helpyou to cut awaythe material). Be

sure to stop the engineand disconnect the spark plug

wire before clearing the tines by hand.

WARNING: Beforeclearing the

tines by hand,stop the engine,allow all

moving partsto stop and disconnect the

spark plug wire. Removethe ignition key

on electric start models.

Failureto follow this warning could result

in personal injury.

LoadingandUnloadingthe Tiller

_ ARNING: Loading and

unloading the tiller into avehicle is

potentially hazardousandwe don't

recommend doing so unless

absolutelynecessary,as this could

result in personal injury or

property damage.

However,if you must load or

unloadthe tiller, follow the

guidelines given next.

• Before loading or unloading, stopthe engine,

wait for all parts to stop moving,

disconnect the spark plug wire and let the en-

gine and muffler cool.

• Thetiller is too heavy and bulky to lift safely

by one person. Twoor more people should

sharethe load.

• Use sturdy ramps and manually (engine shut

off) roll the tiller into and out ofthe

vehicle. Two or more people are neededto do

this.

• Theramps must be strong enoughto support

the combined weight of the tiller and any han-

dlers. The ramps should provide good traction

to prevent slipping; they should have siderails

to guide the tiller along the ramps; and they

should havea locking deviceto securethem to

the

vehicle.

• The handlersshould wearsturdy footwear that

will helpto preventslipping.

• Position the loading vehicle so that the ramp

angle is as flat as possible (the less incline to

the ramp, the better). Turn the

vehicle's engineoff and apply its parking brake.

• When going up ramps, stand in the

normal operating position and push the tiller

ahead of you. Havea person at eachside to

turn the wheels.

• When going down ramps, walk backward

with the tiller following you. Keep alert for any

obstaclesbehind you. Position a person at

eachwheel to control the speedof the tiller.

Nevergo down ramps tiller-first, as the tiller

could tip forward.

• Placewooden blocks on the downhill side of

the wheels if you needto stop the tiller from

rolling down the ramp. Also, use the blocks to

temporarily keep the tiller in place on the

ramps (if necessary),and to chockthe wheels

in place after the tiller is in the vehicle.

• After loading the tiller, prevent it from rolling

by engaging the wheels in the WHEELDRIVE

position. Chock the wheels with blocks and se-

curely tie the tiller down.

TILLINGTIPS& TECHNIQUES(CON'T)

TerraceGardening(continued)

•Tocreateaterrace, start at the top of the slopeand work down. Gobackand

forth acrossthe first row as shownin Fig.4-10.

• Eachsucceedinglowerterraceis startedby walking belowthe terraceyou're 0 m_

preparing.Foraddedstability of thetiller,alwayskeepthe uphillwheel inthesoft,

newlytilled soil. Do not till the last 12" or more of the downhill outsideedgeof

eachterrace.Thisuntilled strip helpspreventsthe terracesfrom breakingapart

andwashingdownhill. It alsoprovidesa walkingpath betweenrows. _, REPEAT

Fig. 4-10

LOADINGAND UNLOADING

THE TILLER

,_ WARNING: Loadingand

unloading the tiller into a

vehicleis potentially hazardous

andwe don't recommend doing

so unlessabsolutely necessary,

asthis could result in personal

injury or property damage.

However,if you must load or

unloadthe tiller, follow the

guidelines given next.

• Before loading or unloading, stop the en-

gine, wait for all parts to stop moving,

disconnect the spark plug wire and let the

engineand muffler cool.

• The tiller is too heavyand bulky to lift

safely by one person. Twoor more people

should share the load.

• Usesturdy ramps and manually (engine

shut off) roll the tiller into and out of the

vehicle. Twoor more peopleare neededto

do this.

• The ramps must bestrong enoughto

support the combined weight of the tiller

and any handlers. The rampsshould pro-

vide goodtraction to preventslipping; they

should have side rails to guide the tiller

along the ramps; andthey should have a

locking deviceto securethem to the

vehicle.

• The handlersshould wearsturdy footwear

that will helpto preventslipping.

• Position the loading vehicle so that the

ramp angle is as flat as possible (the less

incline to the ramp,the better). Turn the

vehicle's engine off and apply its parking

brake.

• When going up ramps, stand in the

normal operating position and push the

tiller aheadof you. Havea person at each

side to turn the wheels.

• When going down ramps, walkbackward

with the tiller following you. Keepalert for

any obstacles behind you. Position a per-

son at each wheel to control the speed of

the tiller. Nevergo down ramps tiller-first,

as the tiller could tip forward.

• Placewooden blocks onthe downhill side

of the wheels if you needto stop the tiller

from rolling down the ramp. Also, use the

blocks to temporarily keepthe tiller in

place on the ramps (if necessary),and to

chock the wheels in placeafter the tiller is

in the vehicle.

• After loading the tiller, prevent it from

rolling by engagingthe wheels in the

WHEELDRIVEposition. Chockthe wheels

with blocks andsecurely tie the tiller down.

SECTION5: MAINTENANCE

WARNING: Before

inspecting, cleaning or servicing

the machine, shut off engine,

wait for all moving partsto come

to acomplete stop, disconnect

spark plug wire and movewire

awayfrom spark plug. Remove

ignition keyon electric start

models.

Failureto follow these

instructions can result in serious

personal injury or property

damage.

MAINTENANCESCHEDULE

PROCEDURE

Check motor oil level

Cleanengine

Check drive belt tension

Check nuts and bolts

Changemotor oil

Lubricate tiller

Service engine air cleaner system

Check gearoil level in transmission

Checktines for wear

Check air pressure in tires

(if unit haspneumatic tires)

Service spark plug

NOTES

2,3

2,7

1,4

4,6,9

1,5

1Check after first 2 hours of break-in operation.

2Before each use.

3 Every 5 operating hours.

4 Every 10 operating hours,

5 Every 30 operating hours,

6Changemore frequently in dusty conditions.

7-See Engine Owner's Manual forservice

recommendations.

8 - Whichever time interval occurs firsL

g - Changeafter first 2 hours of break-in

TILLER LUBRICATION

After every 10 operating hours, oil or

grease the lubrication points shown in

Figure5-1 and described below.

Useclean lubricating oil (#30weight motor

oil is suitable) and clean generalpurpose

grease (greasecontaining a metallubricant

is preferred, if available).

• Removethe wheels,cleanthe wheel shaft

(A, Fig. 5-1) and apply a thin coating of

grease to the wheel shaft.

• Greasethe back, front and sides of the

depth regulator lever (B, Fig.5-1).

• Removethe tines andclean the tine shaft

(C,Fig.5-1). Usea file or sandpaperto gen-

tly removeany rust, burrs or rough spots

(especiallyaround holes in shaft). Apply

grease to ends of shaft before installing

tines.

• Oil the threads on the handlebar height

adjustment screws and the handlebar

attaching screws (D, Fig.5-1).

D B

Figure 5-1

CHECKFOROIL LEAKS

Beforeeach use,checkthe tiller for signs of

an oil leak-- usually a dirty, oily accumu-

lation either on the unit or on the floor.

A little seepagearound a cover or an oil

seal is usually not a causefor alarm. How-

ever,if the oil drips overnight, then imme-

diate attention is needed. Ignoring an off

leak can result in severetransmission

damage!

If acover is leaking,check for loose

screws. If the screws are tight, a new

gasket or oil seal may be required.

If the leak is from around a shaft andoil

seal, the oil seal probably needsto be

replaced.Seeyour authorized dealeror

contact the factory for service or advice.

IMPORTANT:Neveroperatethe tiller if

the transmission is low on oil. Checkthe

oil level after every 30 hours of

operation and wheneverthere is any oil

leakage.

CHECKHARDWARE

Checkfor loose or missing hardwareaf-

ter every 10 operatinghours andtighten

or replace(as needed)before reusing

tiller

Besure to checkthe screws underneath

the tiller hoodthat securethe transmis-

sion coverandthe DepthRegulatorLever

to the transmission.

CHECKTIRE PRESSURE

(Modelswith pneumatictires)

Checkthe air pressurein both tires. The

air pressure should bebetween 15 PSi

and 20 PSi (pounds per square inch).

Keepboth tires equally inflated to help

prevent machinefrom pulling to one

side.

TRANSMISSION

GEAROIL SERVICE

Checkthe transmission gear oil level

after every 30 hours of operation or

wheneveryou notice any oil leak.Oper-

ating the tiller when the transmission is

low on oil can result in severedamage.

A. To Check the Transmission

Gear Oil Level:

1. Checkthe gear oil level when the

transmission is cool. Gearoil will

expand in warm operatingtemperatures

and this expansionwill provide an incor-

rect oil level reading.

2. With the tiller onlevelground, pull the

Depth Regulator Leverall the way up.

3. Removethe oil fill plug (A, Fig. 5-2)

from the transmission housing andlook

inside the oil fill hole to locatethe main

drive shaft situated below the hole.

WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all

moving partsto come to a complete stop, disconnectspark plug wire and move wire awayfrom

spark plug. Failureto follow these instructions can result in serious personal injury or property

damage.

4. Thegear oil level is correct if the gear oil

is approximately halfway upthe side of the

main drive shaft.

5. Ifthe gearoil level is low, addgear oil as

described next. If the gearoil level is okay,

securely replacethe oil fill plug.

IMPORTANT:Donot operatethe tiller if the

gear oil level is low. Doing so will result in

severedamageto the transmission com-

ponents.

Figure5-2:Removeofffi/I p/ug (tl) to check

gearoff levelandtoaddgearoiL Remove

fourcoverscrews(B)todraingearoil.

6. If adding only a few ounces of gear oil,

use API rated GL-4or GL-5 gearoil having

a viscosity of SAE140, SAE85W-140 or

SAE80W-90. If refilling an empty trans-

mission, use only GL-4gear oil having a

viscosity of SAE85W-140 or SAE140.

IMPORTANT:Do not use automatic trans-

mission fluid or motor oil in the transmis-

sion.

7. While checking frequently to avoid over-

filling, slowly add gear oil into the oil fill

hole until it reachesthe halfway point on

the drive shaft.

8. Securely replacethe oil fill plug.

B. ToDrain theTransmissionGear Oil:

Thetransmission gear oil does not needto

bechanged unless it has beencontaminat-

ed with dirt, sand or metal particles.

1. Drain gasoline from the fuel tank or run

the engine until the fuel tank is empty.See

"DANGER"statement below.

WARNING: Gasolineis

highly flammable andits vapors

areexplosive. Followthese

safety practicesto prevent

personal injury or property

damagefrom fire or explosion.

Allow the engine and muffler to cool

for at least two minutesbefore drain-

ingthe tiller's gasolinetank.

Do not allow open flames, sparks,

matchesor smokingin the area.

Wipe away spills and pushtiller away

from spilled fuel.

Use only an approved fuel container

and store it safely out of the reach of

children.

Donotstoregasoline in an area where

its vapors could reach an open flame

or spark, orwhere ignitionsourcesare

present (such as hot water and space

heaters, furnaces, clothes dryers,

stoves,electric motors,etc.)

2. Drain the oil from the engine.

3. Removefour screws (B, Figure5-2) and

removetransmissioncoverandgasket.

4. Removethe left-side wheel.

5. Tilt the left-side wheel shaft into a drain

panand allow the gearoil to drainthrough

the top of the transmission.

6. Reinstall the wheel.

7. Install a new gasket (do not reuse old

gasket) and reinstall the transmission cov-

er.

8. Refill the transmission using GL-4gear

oil (SAE85W-140 or SAE140).

g. Refill the enginewith motor oil and re-

plenish the fuel tank with gasoline.

BOLOTINES

The bolo tines will wear with useand

should beinspected at the beginning of

eachtilling seasonand afterevery 30 oper-

ating hours. The tines can be replacedei-

ther individually or as a complete set. See

the Parts List pagesfor tine identification

and part numbers.

A. Tine Inspection:

With use,the tines will becomeshorter,

narrower and pointed. Badlyworn tines

will result in a loss of tilling depth, and re-

duced effectiveness when chopping up

andturning under organic matter.

B. Removing4nstalling a Single Tine:

1. With the engine shut off and the spark

plug wire disconnected, remove the two

screws (A, Figure5-3) and nuts (B)that at-

tachasingle tine to atine holder.If needed,

usepenetrating oil on the nuts.

2. When installing a single tine, besure to

position it so that its cutting edge (sharp)

will enter the soft first as the tiller moves

forward.

C. Removing4nstallinga Tine Assembly:

1. Atine assemblyconsists of eight tines

mounted on atine holder.

2. If removing both tine assemblies, mark

them "left" and "right" before removal. Re-

move the screw (C, Figure5-3) and lock-

nut (D)that securethe tine assemblyto the

tine shaft. If necessary,usea rubber mallet

to tap the tine assembly outward off the

shaft.

3. Beforereinstalling the tine assembly,in-

spectthe tine shaft for rust, roughspots or

burrs. Lightly file or sand, as needed. Ap-

ply a thin coat of greaseto the shaft.

4. Install each tine assemblyso that the

cutting (sharp) edge of the tines wifl enter

thesoil first when the filler movesforward.

Securethe fine assemblyto the tine shaft

using the screw and Iocknut

,_ WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all

moving partsto come to a complete stop, disconnectspark plug wire and move wire awayfrom

spark plug. Failureto follow these instructions can result in serious personal injury or property

damage.

FORWARD

Figure 5-3: Install tinesso that cuttingedge oftines entersoft first when tiller movesforward.

CHECKINGAND ADJUSTING

FORWARDDRIVE BELT TENSION

It is important to maintain correct tension

on the forward drive belt. A loosebelt will

causethe tinesandwheelsto slow down--

or stop completely -- eventhough the en-

gine is running at full speed.A too tight

belt can result in unintentional tine move-

ment when the clutch bail is in the Neutral

(released) position.

• Checkbelt tension after the first two

hours of break-in operation andafter every

10 operating hours.

• At the end of each tilling season, check

the belt for cracks, cuts or frayed edges

and replace it as soon as possible.

tension is correct if this second measure-

ment is between1/6"-to- 3/16" longer than

the first measurement.

4. If the spring is too short (lessthan

1/16"), the tension is too loose. If the

spring is too long (more than 3/16"), the

tension is too tight.

5. Toadjust the length of the spring:

a. Releasethe Forward Clutch Bail.

b. Unthreadthe hex nut (C,Figure 5-4)

halfway up the adjustment screw (D).

c. Unhookthe top of the spring from the

Forward Clutch Bail.

d. Usepliers to preventthe adjuster (B)

from turning andturn the slotted screw lo-

cated inside the spring clockwise (viewed

from operator'sposition) to increaseten-

sion onthe spring. Turnthe screw counter-

clockwise to decreasetension. Once

adjusted, reattachthe spring to the For-

ward Clutch Bail.

e. RepeatSteps2and3to re-measurethe

length of the spring.Whenthe secondmea-

surementis between1/16"-to- 3/16"longer

than thefirst measurement,retightenthe hex

nut (C)againstthe top of the adjuster(B).

ReplacementBelt Information

If the drive belt needsto be replaced,see

your local authorizeddealeror refer to the

Parts List for ordering information. Use

only a factory-authorized belt as an "over-

the-counter" belt may not perform satis-

factorily. The procedure requires average

mechanicalability andcommonly available

tools.

ToCheckForwardBeltTension:

1. Stop engine, wait for all parts to stop

moving and disconnect spark plug wire.

2. With the ForwardClutch Bailinan open

(released) position, measureand note the

overall length of the cable spring (A, Figure

5-4) by measuringfrom the outermost coil

to the outermost coil.

3. SqueezetheForwardClutch Bailagainst

the handlebar(see Figure 5-4) and re-

measurethe length of the coils. The belt

Figure5-4: Tocheckforwardbelt tension, take twomeasurementsof the

overa//length of the coilsin the spring-- first withthedutch bail open,

thenwith thedutch bail closedagainstthe handlebar.

,_ WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all

moving partsto come to a complete stop, disconnectspark plug wire and move wire awayfrom

spark plug. Failureto follow these instructions can result in serious personal injury or property

damage.

FORWARDCLUTCH

BAIL ADJUSTMENT

If the Forward Clutch Baildoes not func-

tion properly,first checkthat the forward

drive belt is adjusted properly (see Check-

ing andAdjusting Forward Drive Belt Ten-

sion). If this fails to correct the problem,

contact Troy-Bilt LLC or your authorized

dealerfor service advice.

CHECKINGANDADJUSTINGRE-

VERSEDRIVEBELTTENSION

(Models643B & 645A only)

It is important to maintain correct tension

on the reversedrive belt. A loose belt will

causethe tines andwheelsto slow down -

or stop completely - eventhough the en-

gine is running at full speed.

Whenchecking belttension, also checkthe

belt for cracks, cuts or frayed edgesand

replace it as soon as possible.

• Checkbelt tension after the first two

hours of break-in operation andafter every

10 operating hours.

ToCheckReverseBeltTension:

1. Stop engine, wait for all parts to stop

moving and disconnect spark plug wire.

2. Removescrew in plastic belt cover and

slide belt cover (which is attached to for-

ward clutch cable) out of the way.

3. Haveanassistant pull the Reverse

Clutch Control knob all the way out and

hold it inthat position. Measurethe length

of the cable wire betweenthe end of the

threaded cableadjuster (A, Figure5-5) and

the end of the Z-fitting (B)to which the ca-

ble wire is attached.

4. Thebelt tension is idealif the cablewire

length measuresbetween1/8"to 1/4".If it is

lessthan 1/8" (andif there is no reverseac-

tion whenthe tiller is running), then make

the following adjustments

NOTE:Ifthe lengthis morethan 1/4",noad-

justment is needed--as long asthe reverse

actionfunctions properly.

5. Releasethe ReverseClutch Control

knob.andthen unthread the inner jam nut

(C, Figure 5-6) oneto two turns. Pull the

threaded cable adjuster (A, Figure 5-6) to

the left until the innerjam nut (C) touches

the bracket.

6. Preventthe inner jam nut (C) from turn-

ing and tighten the outer jam nut (D)

againstthe bracket. Preventthe outer jam

nut (D) from turning and tighten the inner

jam nut (C) againstthe bracket.

7. Measurethe gap by repeating Step 3.

Readjust as neededby repeating Steps 5

and 6.

8. Reinstall the belt cover.

Figure5-5: Measure cable wire lengthto

checkfor correctreversebelt tension.

Figure5-6:Movethreadedadjuster(,4)toleft

toincreasebelttension.

Replacement Belt Information

If the drive belt needsto be replaced,see

your local authorizeddealeror refer to the

Parts List for ordering information. Use

only a factory-authorized belt as an "over-

the-counter" belt may not perform satis-

factorily. The procedure requires average

mechanicalability andcommonly available

tools.

ENGINECLEANING

Keepingthe engineclean will help to en-

sure smooth operation and prevent dam-

agefrom overheating. Referto the Engine

Owner's Manualfor enginecleaning ser-

vice intervals and instructions. Besure

thatthe muffler is cool beforeservicing the

engine.

AIRCLEANERSERVICE

The air cleaner filters dirt and dust out of

the air before it enters the carburetor. Op-

erating the enginewith a dirty, clogged air

filter can causepoor performance and

damageto the engine. Neveroperatethe

enginewithout the air cleanerinstalled. In-

spect and service the air cleaner more of-

ten if operating in very dusty or dirty

conditions. Referto the engine Owner's

Manualfor air cleanerservice intervals and

instructions.

ENGINE OIL SERVICE

Checkthe engine oil level before each use

and after every five hours of continuous

operation. Runningthe engine when it is

low on oil will quickly ruin the engine.

It is recommendedthat you changethe

motor oil after every 10hours of operation

and even sooner when operating in ex-

tremely dirty or dusty conditions. Referto

the EngineOwner's Manual for detailed

service instructions.

A. ToCheckthe EngineOil Level:

1. Parkthetiller ona levelareaandshut off

the engine.

2. Levelthe engine (use the Depth Regula-

tor Leverto adjust the engineangle).

WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all

moving partsto come to a complete stop, disconnectspark plug wire and move wire awayfrom

spark plug. Failureto follow these instructions can result in serious personal injury or property

damage.

3. Cleanaround the oil dipstick or oil fill

tube (whichever applies) to prevent dirt

from failing into the crankcase.

4. Onengines with an oil fill tube, remove

the fill cap and add oil (if required) until it

reachesthe top of the fill tube. Reinstallthe

fill cap.

5. Onengines with a dipstick, remove it

and wipe it clean. Reinsertthe dipstick,

tighten it securely,and removeit. Add oil

as neededto bring the level upto the FULL

mark. Wipe dipstick clean each time oil

level is checked. Do not overfill. Tighten

dipstick securely.

B. ToChange the EngineOil:

Changethe engine oil as instructed in the

EngineOwner's Manual.

SPARKPLUGSERVICE

Inspect andcleanor replacethe spark plug

after every 100 operating hours or annual-

ly. Referto the EngineOwner'sManualfor

spark plug service instructions.

In some areas,local law requires using re-

sistor spark plugs to suppress ignition sig-

nals. If the enginewas originally equipped

with a resistor spark plug, use the same

type for replacement.

SPARKARRESTERSCREEN

SERVICE

If the engine muffler is equipped with a

spark arresterscreen, removeand clean it

according to the service intervals and in-

structions in the EngineOwner'sManual.

THROTTLELEVERADJUSTMENT

If the engine does not respond to various

throttle lever settings, refer to the Engine

Owner's Manual for service information or

contact your local authorized engine

dealer.

WARNING: Operators

shall not tamper with the engine

governor settings onthe

machine;the governor controls

the maximum safeoperating

speedto protect the engineand

all moving parts from damage

causedby overspeed.

Authorizedservice shall be

sought if a problem exists.

CARBURETOR/GOVERNOR

CONTROLADJUSTMENTS

Thecarburetor wasadjusted at the factory

for best operating speed. Referto the En-

gine Owner's Manualfor any adjustment

information or see your authorizedengine

dealer.

The governor controls the maximum safe

operating speed and protects the engine

andall moving partsfrom damagecaused

by overspeeding. Do not tamper with the

enginegovernor settings.

OFF-SEASONSTORAGE

When the tiller won't be used for an

extendedperiod, prepareit for storageas

follows:

1. Cleanthe tiller and engine.

2. Do routine tiller lubrication and check

for loose parts and hardware.

3. Protect the engine and perform recom-

mended engine maintenanceby following

the storage instructions found in the

EngineOwner'sManual. Besure to protect

the fuel lines, carburetor and fuel tank

from gum deposits by removing fuel or by

treating fuel with a fuel stabilizer (follow

enginemanufacturer'srecommendations).

4. Store unit in a clean,dry area.

5. Neverstore the tiller with fuel in the fuel

tank in an enclosedareawhere gas fumes

could reach an open flame or spark, or

where ignition sources are present (space

heaters, hot water heaters, furnaces, etc.).

PROBLEM

Enginedoes not start

Enginerunspoorly.

Engineoverheats.

Enginedoesnotshotoff

WheelsandTineswill notturn

Tinesturn,butwheelsdon't,

WheelsTurn,butTinesDon't,

Poor tilling performance.

WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all

moving partsto come to a complete stop, disconnectspark plug wire and move wire awayfrom

spark plug. Failureto follow these instructions can result in serious personal injury or property

damage.

TROUBLESHOOTING

POSSIBLECAUSE

1. Spark plug wire disconnected.

2. Engine Throttle Control Lever incorrectly set.

3. Fueltank empty.

4. Choke control (if so equipped) in incorrect position.

5. Stale gasoline.

6. Dirty airfilter.

7. Defective or incorrectly gapped spark plug.

8. Carburetor out of adjustment.

9. Misadjusted throttle control.

10. Dirt or water in fuel tank.

1. Defective or incorrectly gapped spark plug.

2. Dirty airfilter(s).

3. Carburetor out of adjustment.

4. Stale gasoline.

5. Dirt or water in fuel tank.

6. Engine cooling system clogged.

1. Engine cooling system clogged.

2. Carburetor out of adjustment.

3. Oil level is low.

1. Misadjusted throttle control or ignition switch.

1. Improper useof controls.

2. Worn, broken, or misadjusted drive belt(s).

3. Internal transmission wear or damage.

4. Bolt loose in transmission pulley.

1. Wheel Drive Pins not in WHEEL DRIVE.

2. Bolt loose in transmission pulley.

3. Internal transmission wear or damage.

1. Tine holder mounting hardware missing.

2. Bolt loose in transmission pulley.

3. Internal transmission wear or damage.

1. Worn tines.

2. Improper Depth Regulator setting.

3. Incorrectthrottle setting.

4. Forward Drive Beltslipping.

CORRECTION

Reconnectwire.

2. Put lever in STARTposition.

3. Add fuel.

4. See Engine Owner's Manual.

5. Drain fuel and add fresh fuel.

6. Clean or replace filter.

7. Inspect spark plug.

8. See Engine Service Dealer.

9. See Engine Service Dealer

10. See Engine Service Dealer.

Inspect spark plug (see Engine Owner's Manual).

2. Clean or replace (see Engine Owner's Manual).

3. See Engine Service Dealer.

4. Replacewith fresh gasoline.

5. See Engine Service Dealer.

6. Cleanair cooling system (see Engine Owner's Manual).

Cleanair cooling area (see Engine Owner's Manual).

2. See Engine Service Dealer.

3. Check oil level (see Engine Owner's Manual).

1. See Engine Owner's Manual or Engine Service Dealer.

1. ReviewSections 3 and 4.

2. See "Checking Drive Belt Tension," Section 5.

3. Contact local dealer or the factory.

4. Tighten bolt.

1. See "Wheel Drive Pins" in Section 3.

2. Tighten bolt.

3. Contact local Dealer or the Factory.

1. Replacehardware.

2. Tighten bolt.

3. Contact local Dealer or the Factory.

1. See "Bolo Tines" (Section 5).

2. See "Tilling Tips & Techniques," Section 4.

3. See Section 4.

4. See "Checking Forward Drive Belt Tension," Section 5.

NOTES

Models643C, 643B& 645A

MODELS643C,643B& 645A

REF PART NO.

NO.

1 686-04043

686-04041

2 710-0395

3 710-0597

4 710-0599

5 710-0874

6 710-3008

7 712-04063

8 712-04064

9 715-0108

10 732-04320

11 736-0275

12 750-04149

13 750-04160

14 750-04556

15 786-04092

16 786-04098

17 786-04104

18 786-04191

19 786-04290

20 786-04291

21 786-04292

22 710-0106

23 710-04163

24 712-3009

25 712-0121

26 712-0291

DESCRIPTION

TineHoodAssembly(A)

TineHoodAssembly(B)(C}

HexScrew,5/16-18x 2.25

HexHd.Screw,1/4-20x 1

Screw,Self-Tapping,I/4-20x 1/2

mexHd.Screw,5/16-18x 1-1/4

mexHd.Screw,5/16-18x .75

HexLockNut,Nylon,5/16-18

HexLockNut,Nylon,1/4-20

SpirolPin

Spring,DepthRegulator

FlatWasher,5/16

Spacer,.462x .328x 1.63

Bushing

Spacer

ReverseStopArm

ChannelSupportBracket

DragBar

FlapStopBracket

HoodBracket,LeftHand

HoodBracket,RightHand

AdjustableDepthBar

HexHd.Screw,1/4-20x 1-1/4

Screw,#10-24x 2

HexLockNut,5/16-18

mexNut,#10-24

HexLockNut,1/4-20

REF PART NO.

NO.

27 732-04185

28 746-04208

29 746-04058

30 747-04210

31 749-04084

32 749-04208

33 749-04106

34 732-04040

35 786-04188

36 786-04200

37 710-0216

38 710-0805

39 712-3000

40 736-0119

41 725-0157

42 736-3050

43 712-04065

44 710-0347

45 710-0514

46 710-04048

47 742-04117

48 742-04116

49 686-04066

686-04065

GW-1901

DESCRIPTION

Spring, ForwardClutch

CableAssembly, Forward Clutch

CableAssembly, ReverseClutch (B) (C)

Bail, ForwardClutch

Upper Handlebar

Lower Handlebar

Tab,Conduit Mount

Bracket, ReverseClutch Cable(B) (g)

HandlebarSupport

Panel

Screw, Hex, 3/8-16 x 3/4

Screw, Hex,5/16-18 x 1-1/2

Hex Lock Nut, 3/8-16

LockWasher, 5/16

CableTie

FlatWasher, 3/8

FlangeLock Nut 3/8-16

Hex Hd. Screw, 3/8-16 x 1-3/4

Hex Hd. Screw,3/8-16 x 1, Grade5

FlangeScrew .312-18 x 1.00

Single BoloTine - Left Hand

Single BoloTine - Right Hand

Tine Holder (A)

Tine Holder (B) (C)

Bolo Tine ReplacementSet (IncL eight

right-hand tines, eight left-hand tines and

required hardware). (A)(B)(C)

(A)ForModel643C

(B)ForModel643B

(C)ForModel645A

MODELS643C,643B& 645A

REF

NO.

1 GW-9517

2 GW-1714

3 GW-50043

4 711-04110

5 GW-1224-1*

GW-1224-2"

GW-1224-3"

GW-1224-4"

-- GW-1325C

PARTNO. DESCRIPTION

Snap Ring

Bearing,Tapered Roller(with race)

Support Washer, Rear

Drive Shaft

Shim, RearBearing Cap,.010"thick

Shim, sameas above,except .030" thick

Shim, same asabove, except .005"thick

Shim, sameas above,except .062" thick

Shim Set (Incl. the following shims:

two #1224-1, two 1224-2 & one #1224-4)

* Useas required to obtain between .005" and .015" allowable end-play.

REF

NO.

1 GW-9727

2 710-04049

3 736-0119

4 1918377

5 1916641

6 GW-50032

7 721-04030

8 721-04031

9 619-04013

10 721-04036

11 736-3008*

12 718-04008

13 710-04048

14 710-3008

PARTNO. DESCRIPTION

Plug,TransmissionOilFill

HexHd.FlangeScrew,5/16-18x 5/8,Gr.5

LockWasher,5/16

RearCover,Transmission

FrontCover,Transmission

Gasket,HousingCover

OilSeal,DriveShaft

OilSeal,WheelShaft

TransmissionRousingAssembly

OilSeal,TineShaft

Washer,Flat,.344x.750x.120

RearBearingCap

HexHd.FlangeScrew,5/16-18x 1

Hexmd.FlangeScrew,5/16-18x 3/4

*Includedwithtransmissionwhenpurchasedasanassemblyonly.

Removeanddiscardwheninstallingthetransmissionontiller.

MODELS643C,643B& 645A

FRONT

(A) ForModel643C

(B) ForModel643B

REF

NO.

* Useas

PARTNO. DESCRIPTION

1909950

GW-1166-1*

GW-1166-2"

GW-1166-3"

GW-1166-4"

GW-1166-5"

GW-1086

711-04512

711-04486

GW-9305

GW-1132-2

1904278

711-04078

GW-1104

1916542

Retainer,SnapRing

Shim,0.062"thick

Shim,0.030"thick

Shim,0.015"thick

Shim,0.010"thick

Shim,0.005"thick

BronzeBushing

WheelShaft(A)

WheelShaft(B)(C)

Key,Hi-Pro,1/4x 1

Spacer

WormGear,WheelShaft

TillerShaft

WoodruffKey

WormGear,TillerShaft

required to obtain between .005" and .030" allowable end-play.

MODELS643C,643B& 645A

Model 643C

MODELS643C,643B& 645A

REF

NO.

PARTNO.

736-0159

756-04198

656-04023

656-04005

756-04169

786-04095

754-04090

754-04091

731-05268

732-04289

732-04081

732-04079

786-04068

786-04069

786-04070

748-04087

786-04276

786-04275

710-0672

710-0117

710-0237

710-0376

710-04049

710-0347

710-0520

710-0599

710-3103

712-3000

712-3009

DESCRIPTION

FlatWasher, 5/16

Pulley, EngineDrive

Transmission Pulley(A)

Transmission Pulley (B} (C)

Pulley, ReverseIdler (B) (C)

Guard, Belts/Pulleys

Forward Drive Belt

ReverseDrive Belt (B) (C)

BeltCover

ReverseReturnSpring (B) (C)

BeltGuide (B) (C)

BeltGuide

EngineBracket, Left

EngineBracket, Right

Bracket, BeltCover

Shoulder Washer

ReverseIdler Arm (B) (C)

Forward Idler Lever

HexHd. Screw,5/16-24 x 1.25 (A)

HexHd. Screw,5/16-24 x 1 (B) (C)

HexHd. Screw,5/16-24 x 543

HexHd. Screw,5/16-18 x 1

HexHd. Screw,5/16-18 x 5/8

HexHd. Screw,3/8-16 x 1-3/4 (A)

HexHd. Screw,3/8-16 x 1.50 (B) (C)

Screw, Self-Tapping, 1/4-20 x 1/2

HexHd. Screw,5/16-18 x 2 (B) (C)

Lock Nut, 3/8-16

Lock Nut, 5/16-18 (B) (C)

REF

NO.

PARTNO.

736-0119

750-0535

736-3050

736-3090

736-0452

710-0459A

736-04181

732-04085

786-04107

756-04170

714-0105

736-3078

736-04193

710-0805

710-0395

712-04063

750-0258

736-0315

736-04192

736-0242

749-04193

726-0201

714-0143

734-04188

634-04232

634-04218

734-0255

734-04163

DESCRIPTION

LockWasher, 5/16 (A)

Spacer,.380 IDx .625 ODx .21 (A)

FlatWasher .406 x .812 x .051 (B) (C)

FlatWasher

BellWasher

HexHd. Screw, 3/8-24 x 1.50,GR5

Support Washer

Forward ReturnSpring

Bracket,Cable Mounting

Forward Idler Pulley

Key,3/16" x 1"

FlatWasher

BellevilleWasher

HexScrew, 5/16-18 x 1.50 Gr5 (A) (B)

HexScrew, 5/16-18 x 2-1/4, Gr5 (C)

Nut, HexLock, 5/16-18

Spacer,Shoulder (A)

Washer, Flat, .75x 1.5x.125 (A)

FlatWasher .786 x 1.000x .031 (B) (C)

BellWasher

Bumper (C)

Nut, Speed, 5/16-18 (C)

Klik Pin

CompleteWheel Assembly 10 x 2.75 (A)

CompleteWheelAssembly 13 x 5 x 6 (B} (C)

Rim Assembly (B) (C)

AirValve(B} (C)

Tire(B)(C)

(A)ForModel643C

(B)ForModel643B

(C)ForModel645A

NOTES

TROY-BILT TILLER LIFETIME LIMITED WARRANTY

WHAT PRODUCT

IS COVERED All Troy-Bilt branded rear tine walk-behind tillers with gear drive transmissions.

This warranty begins on the date of purchase and is warranted by Troy-Bilt LLC for the life of the

tiller, to the original purchaser only.

WHAT IS COVERED Troy-Bilt LLC will, at its option, repair or replace any part found to be defective in material or

BY THIS WARRANTY workmanship without charge for parts and labor

This limited lifetime warranty also applies to non-powered attachments and accessories.

Powered attachments and accessories are warranted separately by their manufacturers. Refer

to the applicable manufacturer's warranty on these items for terms and conditions.

WHAT IS NOT This warranty does not apply to parts that have been damaged by accident, alteration, misuse,

COVERED BY THIS abuse, neglect, improper maintenance, vandalism, theft, fire, water, or damage because of peril

WARRANTY or other natural disaster.

The following items are not covered after the first year of this residential use limited warranty:

belts, batteries, bushings, seals, tines, tires, wheels, paint, appearance items, and similar items

that are normally replaced through periodic maintenance.

Charges for pick-up, delivery, and service calls are not covered by this warranty.

Service completed by someone other than an authorized service dealer is not covered by this

warranty.

Parts that are not genuine Troy-Bilt LLC service parts are not covered by this warranty.

The engine is warranted separately by the engine manufacturer. Refer to the engine

manufacturer's warranty for terms and conditions.

LIMITED

COMMERCIAL

USE WARRANTY

If used for commercial, institutional, industrial, rental, or demonstrator purposes, the warranty

on the tiller is limited in duration to 90 days from the date of purchase.

This warranty does not apply to parts that have been damaged by accident, alteration, misuse,

abuse, neglect, improper maintenance, vandalism, theft, fire, water, or damage because of

peril or other natural disaster.

HOW TO OBTAIN

SERVICE Warranty service is available, with proof of purchase, through your local authorized service

dealer. To locate a dealer in your area, consult your Yellow Pages, or contact Troy-Bilt LLC at

P.O. Box 361131, Cleveland, Ohio 44136-0019, 1-866-840-6483, or log on to our Web site at

www.troybilt.com.

The provisions set forth in this warranty provide the sole and exclusive remedy arising from the sale. Troy-Bilt LLC shall

not be liable for any incidental or consequential damage or expense of any kind, including but not limited to cost of

equipment rental, loss of profits, or costs of hiring services to perform tasks normally performed by the equipment.

Any implied warranties, including any implied warranty of merchantability or fitness for a particular purpose, shall be limited

in duration to the period of ownership by the original purchaser (and a maximum of 90 days from the date of sale if the tiller is

purchased for commercial or other non-residential use).

Some states do not allow the exclusion or limitation of incidental or consequential damages, or limitations on how long an

implied warranty lasts, so the above exclusions or limitations may not apply to you.

This limited warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

For customer assistance, contact your nearest authorized dealer, or contact us at:

TROY-BILT LLC, P.O. Box 361131, Cleveland, Ohio 44136-0019, 1-866-840-6483

Troybilt 21A 643B711 User Manual REAR TINE TILLER Manuals And Guides L0601227

TROYBILT Rear Tine, Gas Tiller Manual L0601227 TROYBILT Rear Tine, Gas Tiller Owner's Manual, TROYBILT Rear Tine, Gas Tiller installation guides

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