Troy-Bilt PRO LINE 644HMBRONCO, PRO LINE 645AMBRONCO, PRO LINE Bronco 644H, PRO LINE Bronco 645A Operator's Manual

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Operator's Manual

Rear-tine Tiller Models

644HmBronco TM 645AmBronco TM

Model 644H Shown (bumper syles vary)

IMPORTANT:READ SAFETY RULES AND INSTRUCTIONS CAREFULLY

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 arrester 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 by contacting the service department at Troy-Bilt LLC, P.O. Box 361131 Cleveland, Ohio 44136-0019.

TROY-BILT LLC, P.O. BOX 361131, CLEVELAND, OH 44136-0019

PRINTED IN USA FROM NO. 769-00585B

(11/2003)

TABLEOFCONTENTS

Content Page Content Page

Customer Support 2 Maintenance 19 Safety 3 Off-season Storage 24 Assembly 6 Troubleshooting 25

Features and Controls 10

Operation 13 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.

www.troybilt:com CLEVELAND,01144136

330-558-7220 1-800-520"5520

Copy the model number here:

Copy the serial number here:

CUSTOMERSUPPORT

PleasedoNOTreturntheunittotheretailerwithoutfirstcontactingCustomerSupport.

Ifyou have difficultyassembling 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 willget the four options reproduced here. Click on the appropriate buttonand help is

immediately available.

The answer you are _ The answer you are

I lOOKingfor could be just ....,,_y.... _ ,,.........,_0._......... looking for could bejust

a mouse click away! a mouse click away!

The engine manufacturer is responsible for all engine-related issues with regard to performance, power-rating, specifications, warranty to engine

and service. Please refer the

manufacturer's Owner's/Operator's Manual, packed separately with your unit, for more information.

Safety

SPARKARRESTERWARNINGTO RESIDENTSOFCALIFORNIAANDSEVERALOTHERSTATES

UnderCalifornia law, and underthe laws of several other states,you are not permitted to operatean internalcombustion engine using hydrocarbon fuels on anyforest, brush, hay, grain, or grass

covered land; or land covered byanyflammable agricultural crop without an engine spark arrester in continuous effectiveworking order.

The engineonthe unit is an internal combustion engine which burns gasoline,a hydrocarbon fuel, and must be equippedwith a

spark arrester muffler incontinuous effectiveworking order. Thespark attester must beattachedto the engine exhaustsystem in such a mannerthat flames or heatfrom the systemwill not ignite flammable material. Failureof the owner/operator of the unit to

comply with this regulation is a misdemeanor under California law (and other states) and may also bea violation of otherstate and/orfederal regulations, laws, ordinancesor codes. Contactyour local fire marshal or forest servicefor specific information

aboutwhich regulationsapply in your area.

Training

1. Carefully readthis

Owner's Manual,the separateEngineOwner's Manual,and any other literature you may receive.Bethoroughly familiar with the controls and the proper use of the tiller and its engine. Know howto stop the unit and disengagethe controls quickly.

2. Neverallow children to operate the tiller. Neverallow adults to operatethe tiller without proper instruction.

3. Keepthe area of operationclear of all

persons, particularly children and pets.

4. Keepin mind that the operator or user

is responsiblefor accidents or hazards occurring to other people,their property,

andthemselves.

Preparation

1. Thoroughly inspect thearea wherethe tiller isto be usedand removeall foreign

objects.

2. Besure all tiller controls are released

and both wheelsare in the WheelDrive position before starting the engine.

3. Do not operatethe tiller without

wearingadequateoutergarments. Avoid loosegarments or jewelry that could get caught in moving parts.

4. Do not operatethe tiller when barefoot

or wearing sandals,sneakers,or light

footwear. Wear protectivefootwear that

will improve footing on slippery surfaces.

5. Donot till near underground electric cables,telephonelines, pipesor hoses. If

in doubt, contact your telephoneor utility

company.

6. Warning: Handlefuel with care; it is highlyflammable and its vaporsare

explosive. Besureto takethe following

precautions:

a. Storefuel in containers specifically

designedfor this purpose.

b. Thegascap shall neverbe removed

or fuel addedwhile the engine is running. Allow the engineto cool

for several minutes beforeadding fuel.

c. Keepmatches,cigarettes, cigars,

pipes, openflames, and sparks

awayfrom the fuel tank and fuel container.

d. Fillfuel tank outdoors with extreme

care. Neverfill fuel tank indoors.

Useafunnel or spout to prevent

spillage.

e. Replaceall fuel tank and container

caps securely.

I. If fuel isspilled, do not attempt to

start the engine, but movethe

machineawayfrom the areaof spillage and avoidcreating any source of ignition until fuel vapors

havedissipated.

7. Nevermakeadjustments when engine is running (unless recommendedby manufacturer).

Operation

1. Do not put hands or feet nearor under

rotating parts. Thetines begin to rotate oncethe engine startsand the Forward Clutch Bail (or ReverseClutchControl) is engaged.

2. Exerciseextremecaution whenon or crossing gravel drives,walks, or roads.

Stay alert for hidden hazardsor traffic. Do not carry passengers.

3. After striking a foreign object, stop the engine,remove the wire from the spark plug and prevent it from touching the spark plug, thoroughly inspectthe machinefor any damage,and repairthe damagebeforerestarting and operating

the machine.

4. Exercisecaution to avoidslipping or falling.

5. If the unit should start to vibrate abnor- mally, stop theengine, disconnect the

spark plug wire and prevent it from touching the spark plug, and check immediately for thecause.Vibration is generallya warning of trouble.

6. Stopthe engine, disconnect the spark plug wire and preventit from touching the spark plug wheneveryou leavethe operating position, before unclogging the tines, or when making any repairs,adjust- ments or inspections.

Section1: Safety

7. Takeall possible precautions when

leavingthe machineunattended.Stopthe

engine. Disconnectspark plug wire and

move it awayfrom the spark plug. Be

sure both wheels are in the WheelDrive

position.

8. Before cleaning, repairing, or inspect- ing,stop the engineand makecertain all moving parts havestopped. Disconnect

the spark plug wire and prevent it from touching the spark plug to prevent acci- dentalstarting.

9. The flap on the tine hood must be

down when operatingthe tiller.

10. Never usethe tiller unless proper

guards, plates, or other safety protective devicesare in place.

11. Do not run engine in an enclosed

area.Engineexhaustcontains carbon

monoxide gas,a deadly poisonthat is

odorless, colorless, andtasteless.

12. Keepchildren and pets away.

13. Never operatethe tiller under

engine powerif the wheels are in the

Freewheelposition.Inthe Freewheel

position,the wheelswill notholdthe tiller backand therevolvingtines could

propelthe tiller rapidly, possibly causinglossof control.Always engage

the wheelswith the wheel drive pins in the WheelDrive position before starting the engine orengaging thetines/wheels

with the Forward Clutch Bailor the

ReverseClutchControl.

14. Beawarethat thetiller may unexpect-

edly bounceupward or jump backward and bepropelled towardyou if the tines should strike extremely hard packedsoil, frozen ground, or buried obstacleslike

largestones, roots, or stumps. If in doubt

about thetilling conditions, alwaysuse thefollowing operating precautionsto assist you in maintaining control of the

tiller:

a. Walk behindandto oneside ofthe

tiller, usingone handonthe han- dlebars. Relaxyour arm, butuse a

securehandgrip.

b. Use a deepdepthregulator

setting.

c. Useslowerenginespeeds. d. Clear the tilling area of all large

stones,rootsandotherdebris.

e. Avoidusingdownwardpressure

on handlebars.If needbe, use slightupwardpressureto keep the

tines from diggingtoodeeply.

f. Beforecontactinghardpackedsoil

at the endof a row, reduceengine speedand lilt handlebarsto raise

tines out ofthesoil.

g. In an emergency,stoptines and

wheels by releasingwhichever

clutchcontrolis engaged. Donot attemptto restrainthetiller.

15. Do not overloadthetiller's capacity

by attempting to till too deeplyattoo fast a rate.

16. Neveroperatethetiller at high

transport speeds on slippery surfaces.

Look behind and usegreat care when backing up.

17. Do not operatethe tiller on a slope

that istoo steepfor safety. When on

slopes,slow down and makesureyou havegood footing. Never permitthe tiller

to freewheel down slopes.

18. Neverallow bystanders nearthe unit.

19. Only use attachments and acces- sories that areapproved bythe manufac-

turer of the tiller.

20. Usetiller attachments and acces- sories when recommended.

21. Neveroperatethetiller without good

visibility or light.

22. Neveroperatethetiller ifyou are

tired, or underthe influenceof alcohol,

drugs or medication.

23. Operatorsshall not tamper with the engine-governorsettings on the machine;

the governor controls the maximum safe

operatingspeedto protect the engineand all moving partsfrom damagecausedby overspeed. Authorized serviceshall be sought if a problem exists.

24. Do not touch engine parts which may be hot from operation. Let parts cool down sufficiently.

25. Pleaseremember:You canalways stop the tines and wheels by releasingthe

Forward Clutch control or the Reverse Clutchcontrol (whichevercontrol you

haveengaged),or by moving thethrottle control leveron the engineto "OFF"or "STOP".

26. To load or unload thetiller, seethe instructions in Section4 of this Manual.

27. Useextremecaution when reversing or pulling the machinetowards you.

28. Startthe engine carefully according to instructions andwith feet well awayfrom

the tines.

29. Neverpick up or carry a machine

while the engine is running.

Maintenance and Storage

1. Keepthe tiller, attachments and acces-

sories in safe working condition.

2. Checkall nuts, bolts, and screws at

frequent intervals for proper tightness to

besure the equipment is in safeworking

condition.

3. Neverstore thetiller with fuel in the

fuel tank insidea building where ignition sources are presentsuch as hot water and space heaters,furnaces, clothes

dryers,stoves, electric motors, etc.).

Allow engine to cool before storing in any enclosure.

4. To reduce the chancesof afire hazard, keepthe enginefree of grass, leaves,or

excessivegrease.

5. Storegasoline in acool, well-ventilated

area,safelyaway from any spark- or flame-producing equipment. Store gasoline in anapprovedcontainer, safely away from the reachof children.

6. Referto the Maintenancesections of

this Manualand theseparate Engine

Owner's Manualfor instructions if the

tiller isto be stored for an extended

period.

7. Neverperform maintenancewhile the

engine is running or the spark plug wire

is connected,exceptwhen specifically instructed to do so.

8. If the fuel tank hasto be drained,do

this outdoors.

Section1: Safety

Decals

For your safety and the safety of others,

various safety and operational decals are

located on your unit (see Figure 1 below).

Keepthe decalscleanand legible atall

times. Contactyour local service dealer

or the factory for replacementsif any decalsare damagedor missing.

Referto the separate parts catalogfor decallocations, part numbers and ordering instructions.

ForwardClutchControl

OperatingInstruction

ReverseClutchControl OperatingInstruction

StartingStabilization

Messageon engine

Warning Messages

ontine hood

HotSurfaces Warningonbelt cover

Figure 1: Location of Safety and Operating Decals (Model 644H shown).

Operating Symbols

Various symbols (shown here, with word

descriptions)are used on the tiller and engine (your unit may not haveallof the symbols).

FAST SLOW STOP

i÷i I÷1 R

CHOKE CHOKE REVERSE

ON OFF

€,E--> <--lZ,

TILLERDIRECTION

ROTATING

TINES

BAIL BAIL

_-_ 0 _ ENGAGED DISENGAGED

LEVERDIRECTION

TO AVOID SERIOUS INJURY:

• READTHEOWNER'S MANUAL.

• KNOWLOCATIONSANDFUNCTIONSOFALL CONTROLS.

• KEEPALLSAFETYDEVICESANDSHIELDSIN PLACEANDWORKING.

• NEVERALLOWCHILDRENOR UNINSTRUCTEDADULTSTOOPERATETILLER.

• SHUTOFFENGINEAND DISCONNECTSPARKPLUGWIRE BEFOREMANUALLYUNCLOG-

GINGTINESOR MAKINGREPAIRS.

• KEEPBYSTANDERSAWAYFROM MACHINE.

• KEEPAWAYFROMROTATINGPARTS.

• USEEXTREMECAUTIONWHENREVERSINGORPULLINGTHEMACHINETOWARDSYOU.

Assembly

WARNING

To prevent personal injury or property damage, do not start

the engine until all assembly steps are complete and you

have read and understandthe safety and operating instruc-

tions in this manual.

Introduction

Carefullyfollow these assembly steps to correctly prepareyour tiller for use. It is recommendedthat you read this Section in its entirety beforebeginning assembly. NOTE: Enginesylesvary by model. The engineon your tiller may appeardiffer- ently than those shown in illustrations and Figuresthroughout this manual.

Inspectunit

Inspectthe unit and carton for damage immediately after delivery. Contactthe carrier (trucking company) if you find or suspect damage. Inform them of the damageand request instructions for filing aclaim. To protect your rights, put your claim in writing and mail acopy to the carrierwithin 15 daysafter the unit has

beendelivered.

STEP1: Unpacking Instructions

1. Removeanycardboard inserts and

packagingmaterial from the carton. Removeany staples from the bottom of

the carton andthen lift the carton up and

off the unit.

2.Thetiller is heavyand you should not attempt to remove itfrom the shipping platform until the handlebarsare

installed. The procedure for removing the

tiller isexplainedin Step3 ofthese

assemblysteps.

NOTE:Becareful not to severely bendany

of the control cables on the unit.

3. Removeall unassembled parts and the separatehardwarebagfrom the carton. Checkthat you havethe items

listed below (contact your local dealeror

the factory if any items are missing or damaged). NOTE: Usethescrew length

template (Fig. 2-1)to identify screws.

LooseParts List

Qty. Description

1 HandlebarSupport (seeA, Fig.2-2,

page7)

1 HandlebarAssembly

(seeK, Fig.2-2)

Thefo//owing itemsare in the

hardwarebag:

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 Iockwasher,5/16" 4 Hexnut, 5/16"-18 2 HexIocknut, 3/8"-16

IMPORTANT:Motoroil mustbe addedto

the enginecrankcasebeforethe engine

isstarted. Followthe instructionsinthis

"Assembly" section.

NOTE:LEFTand RIGHTsides of the tiller

are as viewed from the operator's

position behindthe handlebars.

Tools/MaterialsNeededfor

Assembly

(2) 1/2" open-endwrench* (1) 3/8" open-endwrench* (2) 9/16" open-endwrench* (1) Largeadjustable wrench (1) Scissors (to trim plastic ties) (1) Ruler (for belt tensioncheck) (1) Block of wood (to support tiller

when removing wheels) (1) Automotive-type air pressure gauge (1) Cleanoil funnel (1) Clean,high-quality engineoil. Refer

to the EngineOwnerManualfor

engine oil specifications and quantity

required. Do not overfill. * Adjustable wrenchesmay be used.

Figure2-1: Toidentifylengthofscrew,

placescrewontemplateasshownand

measuredistancebetweenbottomofscrew headandtipofscrew.

STEP2: Attach Handlebar

1. Attachthe two legsof the handlebar support (A, Fig.2-2) loosely to the inner

sides of thetiller frame using two 3/8"-16 x3/4" hexhd. screws (B), two 3/8" flat

washers(C)and 3/8"-16 hexIocknuts (D).

2. Using using two 5/16"-18 x 1-1/2" hex hd. screws (G), 5/16"split Iockwashers (H) and 5/16"-18 hex nuts (I), loosely attachthethe handlebarsupport (A) using

the upper holes.

3. Thereare three heightadjustment holes in the two handlebarsupport brackets.E & F, Fig.2-2). Usea setting that will position the handlebarsat approximately

waist levelwhenthe tines are 3"-4" into

the soil. Looselyattach the handlebar

support bracketstothe outsideof the handlebarassembly (K) using two 5/16"- 18 x 1-1/2" screws (G), 5/16" split lock- washers(H) and 5/16"-18 hexnuts (I).

NOTE:If a support bracket will not move, loosenattaching screw (J) and nut.

IMPORTANT:Thesupport brackets must be assembledtothe outsideof the

handlebarassembly.

4. Tighten all handlebar mounting hardwaresecurely.

STEP3: Move Tiller Off Shipping

Platform

To move the tiller without the engine

running, put the wheels in their FREEWHEELposition, as described below.

1. Usea sturdy block to raiseonewheel off the ground.

2. Removethe hairpin cotter (L, Fig.2-3) and wheel drive pin (M). Slide the wheel

inward on the wheelshaft (N). Reinstall the wheel drive pin and hairpin cotter through the wheel shaft only (not through the wheel hub). Repeatwith the other

wheel.

3. Using the handlebaras a lever, roll the

tiller to aflat area.

IMPORTANT:Beforestarting the engine, the wheels must be placedin their WHEEL

DRIVEposition (pins through wheel hubs

and wheel shaft). This procedureis

described in "Wheel Drive Pins" in

Section2: Assembly

Fig. 2-2: Attachhandlebar.

Fig. 2-3: Wheel in FREEWHEELING

position (wheel drivepin throughwheel

shaftonly).

Section2: Assembly

STEP4: Install ForwardClutchCable

1. Carefully unwrap theforward clutch

cable (thecablewithout a knob attached to

it) from its shipping position and slidethe

thin cable wire (T, Fig.2-4) into the slot in thecablebracket. Pushthe cableconnector

(U, Fig.2-4) up through the hole in the bracketuntil the groove in the connector

snaps into placeon the bracket.

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

3. Threadscrew (V) intocableadjuster (X).

4. Lift and hold the ForwardClutch bail against the handlebar.SeeFig.2-7.

5. Measurethe length of the cablespring betweenthe ends ofthe coils (Fig.2-7).

Thelength should beapproximately 1-7/8".

If the length is correct, turn the #10-24 hex nut (Z) downtightly againstthe cable

adjuster (X) while holding the adjuster in

place. SeeFigure2-7. If the length is incorrect, you must makean adjustment to

the cabletension as described in "Checking andAdjusting ForwardDrive

BeltTension" in Section 5. When the

spring length is correct, tighten the hex nut

(Z)against the cableadjuster (X).

STEP5: Install ReverseClutch Cable

1. Unwrapthe reverseclutch cable (the

cablewith a knoband a large hex nut attachedto it) from around its shipping

position and route the cable (CC,Fig.2-8

and Fig. 2-9) up to the cable bracket(BB,

Fig.2-8). Besure that the cablegoes beneaththe ForwardClutch Bail asit is

routed upto the cablebracket.

2. Insertthe cableup through the slot in

the cablebracketand position the threaded assembly as shown in Fig.2-8. Makesure that the flat side of thethreaded assembly

isaligned with the flat sideof the mounting hole. Slide the large hex nut (DD) up the

cableand tighten it securely.

Fig. 2-4: Installing forwardclutchcablebracketand cable.

Fig. 2-5: Assemble springand adjuster.

Fig. 2-6: Install forwardclutch cable.

Fig. 2-7: Measure cable spring.

Section2: Assembly

3. Usea cable tie (EE,Fig.2-9) to fasten

the reverseclutch cableto the left side

handlebar.

4. Test the function of the reverseclutch cable by pulling the knob out and

releasingit. The knob should return to its

neutralposition (resting against bracket) when it is released. If it doesn't, contact your local dealer or the factory for

technical assistance.

Flat Side

Fig. 2-8: Install reverse cablemounting bracketand the reverse clutchcable.

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

shown. Attachtohandlebar withcable tie

(EE).

STEP6: CheckLevelof TransmissionGearOil

Thetransmission was filled with gear oil at thefactory. However,you should check the gear oil levelto makecertain it is

correct.

IMPORTANT:Do notoperatethe tiller if

the gear oil level is low. Doingso will

result insevere damageto the transmis-

sign components.

1. Putthe tiller on levelground. Pullthe DepthRegulator Lever(FF, Fig.2-10) backand then adjust it up or down to the

notch that makesthe tiller level.

2. Removethe oil fill plug (GG,Fig. 2-11)

from the transmission housing and look

intothe oil fill hole. You will seethe main

drive shaft on oneside of the hole.

3. Thegear oil leveliscorrect if the gear

oil is approximately halfwayup the side of the drive shaft.

4. If the gear oil level is low, add gear oil byreferring to "A. To Checkthe Transmis-

sion GearOil Level" in Section 5.

STEP7: Add Motor Oil to Engine

Thetiller is shipped withoutoil in the engine.

IMPORTANT:Do not start the engine

without first adding motor oil. Severe engine damagewill result ifthe engine is

run without oil.

1. Referto the EngineOwner's Manual (suppliedwith tiller) for engine oil specifi-

cations and capacities.

2. With the tiller on levelground, pull the DepthRegulator Lever(FF, Fig.2-10) backand then slide it up or down as necessaryuntil the engine is level.

3. Add motor oil asdescribed in the EngineOwner's Manual.

4. Movethe Depth RegulatorLeverall the

way down until the highest notch is engaged. This placesthe tines in the "travel" position.

Fig. 2-10: AdjustDepthRegulator Lever.

Fig. 2-11: Removegear oil fill plug.

STEP 8: Check Hardware for

Tightness

Checkall nuts and screws for tightness.

STEP9: CheckAir Pressurein

Tires)

Usea tire pressuregaugeto check the air pressure in both tires. Deflateor inflate both tires equallyto 15-to-20 PSI (pounds per square inch). Besure that both tires are inflatedequallyor the unit will pull to one side.

IMPORTANT:This completesthe assembly steps. Beforeoperating your

tiller, make sureyou readthe following

Sections in this Manual, aswell asthe separateEngineOwner's Manual:

• Section 1: "Safety"

• Section3: "Featuresand Controls"

• Section 4: "Operation"

FeaturesandControls

WARNING

Before operating your machine, carefully read and

understand all safety, controls and operating instructions in

this Manual, the separate

Engine Owner's Manual, and on the decals onthe machine.

Failure to follow these instructions can result in

serious personal injury.

Forward ReverseClutch

ClutchBail Control

Regulator

HandlebarHeight

Adjustment

Anti-ReverseStake

DrivePin

(on eachwheel)

Figure3-1: Featuresand controls.

Introduction

This section describesthe locationsand functions of thecontrols on your tiller.

Referto the nextsection ("Operation")

for detailed operating instructions.

Practiceusingthese controls, with the

engine shut off, until you understandthe

operationof the controls and feel

confident with eachof them.

IMPORTANT:Referto the separate

engine manufacturer's EngineOwner's

Manualfor informationabout the

controls on the engine.

WheelDrivePins

WARNING

Never allow either of the wheels to be in the

FREEWHEEL position when the engine is running. Always

put bothwheels in the WHEEL DRIVE position before starting

the engine. Failure to comply could cause

loss of tiller control, property damage, or personal injury.

through the holes in the wheel shaft (not the wheelhubs), thus allowing the wheels to turn freely whenthe tiller is pushedor pulled by hand.

To Placethe Wheels in WHEELDRIVEor FREEWHEEL:

1. Stop the engine, disconnect the spark plug wire from the spark plug and allow the engineto cool.

2. Raiseone wheel off the ground and placea sturdy support underthe

transmission.

3. Removethe wheeldrive pin (A,

Eachwheel is equippedwith a Wheel Drive Pin (A, Figures3-2 and 3-3) that securesthewheel to the wheel shaft (B). Thewheels can be positioned in either a

WHEELDRIVEor a FREEWHEELmode. Beforestarting the engine, put both

wheels in the WHEELDRIVEposition by inserting the WheelDrive Pinsthrough

the wheelhubs andthe wheel shaft. This "locks" the wheels to the wheelshaft,

causing the wheels to turn when either

the ForwardClutch Bail orthe Reverse

ClutchControl isengaged.

Usethe FREEWHEELmode only whenthe engine is not running. In FREEWHEEL, the WheelDrive Pinsare placedonly

WARNING

Do not place the tiller on its side when changing the wheel drive positions as doing so

could result in gasoline leaking from the fuel tank.

Failure to follow this instruc- tion could result in personal

injury or propertydamage.

Figures3-2 and 3-3) by removingthe hairpin cotter (C).

Section3: FeaturesandControls

4. FORWHEELDRIVEmode (Figure3-2): Slide the wheeloutward and align the

holesin the wheel hub (D, Figure3-2)) and the wheelshaft (B). Insert the wheel drive pin (A) through the wheel hub and

the wheelshaft. Securethe wheel drive

pin with the hairpin cotter (C) by pushing the hairpin cotter in asfar as it will go.

Repeatfor the other wheel and then

removethe support from beneaththe transmission.

5. FORFREEWHEELmode(Figure 3-3): Slide the wheel inwardand insert the

wheel drive pin (A,Figure3-3) only through the hole in the wheelshaft (B). Securethe wheeldrive pin with the

hairpin cotter (C)by pushing the hairpin cotter in asfar as it will go. Repeatfor the other wheeland then removethe support from beneaththetransmission.

Figure3-2: WHEELDRIVEposition.

Figure3-3: FREEWHEELposition.

Forward Clutch Bail

The Forward ClutchBail (E, Figure3-4)

controls the engagementof forward drive

to the wheelsand powerto the tines.

NOTE:Thewheels will rotate in a forward direction; the tines will rotatecounter-

clockwise(backwardtoward the operator).

To Operatethe Forward ClutchBail:

1. Put the wheels in the WHEELDRIVE

position (see the following "WARNING" statement).

2. Lift and hold the bail againstthe handlebar. The wheels andtines will

rotate- and thetiller will move in a

forward direction.

3. Releasethe bail to disengage(stop)

the wheelsandtines. Forwardtiller motion

will stop (the engine will continue to run).

WARNING

Before starting the engine, be

sure that both wheels are in the WHEEL DRIVE position.

See "Wheel Drive Pins" for instructions.

Engaging the Forward Clutch Bail or the Reverse Clutch

Control when the wheels are not in the WHEEL DRIVE

position could allow the tines

to rapidly propel the tiller forward or backward.

Failure to comply could cause loss of tiller control, property damage, or personal injury.

ReverseClutchControl

The ReverseClutch Control (F, Figure3-4) controls the engagementof reverse drive

to the wheels and tines. This powered

reversingfeature is usedfor maneuvering the tiller only - neverengagethe tines in the ground while going in the reverse

direction.

To Operatethe ReverseClutchControl:

1. Operateonlywhen the wheels are in

the WHEELDRIVEposition (seethe

"WARNING"statementat the left).

2. Stopall tiller motion by releasingthe

ForwardClutch Bail.

3. Lift upthe handlebaruntil the tines clear theground, look behindyou to avoid any obstacles,and then pull the reverse clutch control knobtoward you. The

wheels will rotate in areverse direction.

4. Releasethe reverseclutch control

knobto disengage (stop) the wheels and tines. All reversemotion will stop (the engine will continue to run).

WARNING

• Use extreme cautionwhen

reversing or pulling the machine towardsyou. Look

behindto avoid obstacles.

• Never attempt to till in reverse.

Failure to follow this warning could result in personal injury or propertydamage.

Figure34: FonvardClutchBail (E)andReverse ClutchControl(F).

Section3: FeaturesandControls

DepthRegulatorLever

This lever(G, Figure3-5) controls the tilling depth of the tines. Pullthe lever

straight backand slide it up or down to engagethe notched height settings.

Thehighest notch (lever allthe way down) raisesthe tines approximately 1-

1/2"off the ground. This "travel" setting

allows the tiller to be movedwithout the tines digging into the ground. Also use

this setting when starting the engine.

Movethe lever upward to increasethe tilling depth. Thelowest notch allows a tilling depth of approximately 6"-8",

dependingon soil conditions.

Forbest results, begintilling atthe

deepestdepth possiblewithout causing the tiller to bog down. Increasethetilling

depthfrom one passoverthe soil to the

next.

Shallow

Travel

Position

Deep

_ Settings

HandlebarHeightAdjustment

The handlebarheight is adjustableto three different settings (seeFigure3-6).

As a generalrule,adjust the handlebars so they areat waist levelwhen thetines

are 3"-4" into the soil.

To Adjustthe Handlebars:

1. Stopthe engine, disconnectthe spark

plug wire from the spark plug and allow

the engineto cool.

2. Removethe screws, Iockwashersand nuts, reposition the handlebars,and

reinstall the hardware.

Figure3-6: Handlebarheight adjustment.

Anti-ReverseStake

This stake is locatedat the rear ofthe transmission, under the tine hood (see H,

Figure3-7). Its purpose is to automati- cally help preventthe counter-rotating tines from letting the tiller back up in the direction of the operator if the tiller wheels had beeninadvertently left in the FREEWHEELposition. In this situation,

theAnti-Reverse Stakewill beforced down into the ground, lifting the tines

upward out of the soil and helping prevent backward motion of the tiller.

TheAnti-ReverseStakerequires noadjust- ment, butshould be inspectedbefore eachtiller useto verify that it swivels freely. Removeanyclogged materials (dirt, roots, rocks, etc.) that preventthe Anti-ReverseStakefrom swinging freely.

Figure3-5: Depth regulatorlever.

WARNING

• Place the Depth Regulator

Lever in the "travel"

position before starting the engine. This position

prevents the tines from touching the grounduntil you

are ready to begin tilling.

Failure to follow this warning

could result in personal injury or propertydamage.

Figure3-7: Anti-ReverseStake.

ENGINECONTROLS

Referto the engine manufacturer's Engine Owner's Manual(included in the tiller lit- eraturepackage)to identifythe controls on your engine.

IMPORTANT:Thecontrol for stopping the engine is located on the engine.

.........................Operation

WARNING

Before operating your machine, carefully read and

understand all safety (Section

1), controls (Section 3) and operating instructions(Section

4) in this Manual, in the separate Engine Owner's

Manual, and on the decals on

the machine.

Failure to follow these instruc-

tions can result in serious

personal injury.

INTRODUCTION

Readthis Section ofthe manual thor-

oughly beforeyou start the engine. Then, takethe time to familiarize yourself with the basic operation of thetiller before

using it in the garden. Findan open, level areaand practiceusing thetiller controls without the tines engagingthe soil (put tines in "travel" setting). Onlyafter you've becomecompletely familiar with thetiller should you begin using it in the garden.

INITIAL OPERATION

Perform the following maintenanceduring thefirst hours of newoperation (see

"Maintenance" section in this manual and

inthe EngineOwner's Manual).

1. Changeengineoil after first 2 hours of

newengine operation.

2. Checkfor loose or missing hardware on unit. Tighten or replaceas needed.

3. Checktension on forward drive belt after first 2 hours of operation.

4. Checktransmission gear oil level after first 2 hours of operation.

ReverseClutchControl (knobonbackofbracket)

__---_FonNard Clutch Bail

DepthRegulatorLever

Ii-Reverse Stake

Recoil

Figure4-1

Wheel DrivePin

(oneachwheel)

STARTINGANDSTOPPINGTHE

ENGINE

Pre-StartChecklist

Makethe following checks and perform

the following services beforestarting the

engine.

1. Readthe "Safety" and "Controls" sections in this manual. Readthe

separateEngineOwner's Manual provided bythe engine manufacturer.

2. Checkthat the wheelsare in the WHEELDRIVEposition (wheel pins must

bethrough the wheel hubsand the wheel shaft holes).

3. Checkunitfor looseor missing hardware. Serviceas required.

4. Checkengine oil level. SeeEngine Owner's Manual.

5. Checkthat all safety guards and coversare in place.

6. Checkair cleaner andengine cooling system. SeeEngineOwner's Manual.

7. Attachspark plug wire to spark plug.

8. Fillthe fuel tank with gasoline according to the directions in the separateEngineOwner's Manual. Follow all instructions and safetyrules carefully.

DANGER

GASOLINE IS HIGHLY FLAMMABLE AND ITS

VAPORSARE EXPLOSIVE. Followgasolinesafetyrules in

this manual (see Section 1)

and in the separate Engine Owner'sManual.

Failure to follow gasoline safety instructionscan result

in serious personal injury and property damage.

Section4: Operation

Startingthe Engine

Thefollowing steps describe howto start and stop the engine. Donotattemptto

engagetines or wheels untilyouhave read all the operatinginstructionsin this Section. Alsoreview the salety rules in Section1: "Safety" and the tiller and engine controlsinlormationin Section

3: "Features and Controls."

CAUTION

To help prevent serious

personal injury or damage to equipment:

• Before starting engine, put

both wheels in the WHEEL DRIVE position. Never have

the wheels in the

FREEWHEEL position when the engine is running. When the wheels are in

FREEWHEEL, they do not

hold back the tiller and the tines could propel the tiller

rapidly backward.

• Before starting engine, put

Forward Clutch Bail (all

Models) and Reverse Clutch

Control in neutral (disen-

gaged) positionsby releasing

levers.

• Never run engine indoors or

in enclosed, poorly venti-

lated areas. Engine exhaust

contains carbon monoxide, an odorless and deadly gas.

• Avoid engine muffler and nearby areas. Temperatures in these areas may exceed

150OF.

1. Completethe "Pre-Start Checklist" on

the previous page.

2. Put the wheels in the WHEELDRIVE position (see "Wheel Drive Pins" in

Section 3).

3. Putthe DepthRegulator Leverin the

"travel" position (leverall the way down) so that the tines areclear of the ground.

4. Releaseall controls on thetiller.

5. If engine is equipped with a fuel valve,

1t'urn4valve to open positionas instructed

in the separateEngineOwner's Manual.

6. Put ignition switch and/or throttle control leveron engine in"ON," "RUN,"

"FAST"or "START" position asinstructed in the separateEngineOwner's Manual.

7. Chokeor prime engineas instructed in the separateEngineOwner's Manual.

8. Placeone hand on thefuel tank to stabilizethe unit when you pull the starter

handle. Usethe recoil starter ropeto start

the engine as instructed in the separate

EngineOwner's Manual. Whenengine starts, gradually movechoke lever(on enginesso equipped)to "NOCHOKE,"

"CHOKEOFF"or "RUN" position.

WARNING

Hot surfaces can cause severe burns. Do not touchmuffler or

adjacent areas.

9. Usethe "FAST"throttle speedsetting

whentilling.

WARNING

Keep away from rotating

tines. Rotating tines will

cause injury.

Stoppingthe Engineand Tiller

1. To stop the wheelsand tines, release

the ForwardClutch Bail orthe Reverse

ClutchControl -- whichever control is in

use.

2. To stop the engine, put thethrottle control leveron engine in"OFF"or

"STOP"position.

OPERATINGTHE TILLER

Thefollowing pagesprovide guidelinesto

usingyour tiller effectively andsafely in various gardening applications. Besure to read "Tilling Tips & Techniques" in this

Section beforeyou actually putthe tines

into the soil. This is a CRT(counter-rotating tine) tiller.

As the wheels pull forward, thetines

rotate backward.

This creates an "uppercut" tine action which digs deeply, uprooting soil and weeds. Don't overloadthe engine,but dig asdeeplyas possible oneach pass. On later passes,the wheels may tend to spin in the soft dirt. Helpthem along by lifting up slightly on the handlebar(palm facing

up).

1. Followthe "Pre-Start Checklist" on the previous page. Besure that the wheels

are in the WHEELDRIVEposition.

2. Putthe Depth Regulator Lever in the "travel" position (lever all the way down) so that the tines are clear ofthe ground. Usethis position when practicing with your tiller or when moving to or from the garden. Whenyou are readyto begin tilling, you must move the Depth Regulator Lever to the desireddepth setting (see"Tilling Tips & Techniques").

Checkthat the Anti-Reverse Stakeswivels freelybackandforth. Removeanyclogged

material on or around the stake.

Figure4-2: Use one handto guide tiller whenmovingforward.

3. Start theengine and allow it to warm up. Whenwarm, put throttle control in fast speedsetting.

4. Forforward motion of wheelsand powerto thetines:

(a) Pull the ForwardClutch Bailup and

hold it againstthe handlebar. Release the bail to stop forward motion of the wheelsand powerto the tines.

(b) As the tiller movesforward, relaxand

letthe wheelspullthe unit alongwhile

the tines dig. Walk behindand a

little to one side ofthe tiller. Usea light but secure grip with one hand

on the handlebars,keepingyour arm loose. SeeFigure4-2.

Section4: Operation

WARNING

Do not push down on the handlebars to try to make the tiller till more deeply. This

prevents the wheels from holding the tiller back and can allow the tines to rapidly

propel the tiller backward toward the operator, which

could result in loss of control, property damage, or personal

injury.

Letthetiller moveat its own paceand do

not push down on the handlebarsto try to dig deeper- this takes weight off the wheels,cuts traction, andcausesthe tines to try and propel the tiller.

5. Forreverse motion of the wheels and tines:

(a) Look behindand exercisecaution

when operating in reverse. Donot

till while in reverse.

(b) Stop all forward motion before

reversing. Lift the handlebarswith one hand until the tines areoff the

ground and then pull the Reverse Clutch Control knob outto engage reverse motion (see Figure4-3). To stop reversemotion, let go of the

ReverseClutch Control knob.

6. To Turn the Tiller Around:

(a) Practice turning thetiller in a level,

open area. Bevery careful to keep your feet and legs awayfrom the

tines.

(b) To makeaturn, lift the handlebars

until the engine andtines are balancedover the wheels (Figure 4-4). Thetines must be out of the ground while turning the tiller.

sideways on the handlebarto move the tiller in the direction of the turn

(Figure4-5). After completing the turn, slowly lower the tines into the soil to resume tilling.

Figure4-3: Raise tines off groundandlook behind whenmovingin reverse.

WARNING

Before tilling, contact your telephone or utilities company

and inquire if underground equipment or lines are used in

your area. Their representa- tive will be glad to answer

your questions and tell you if any of their equipment or lines

are buried underground on yourproperty.

Turningthe Tiller Around

Figure4-4: Tobegin turn, lift handlebars until engine and tinesare balancedover

wheels. Besure tinesare out of ground.

Figure4-5: Withtiller balanced over

wheels(and tines out of theground),push

handlebarssidewaystoturntiller.

StoppingtheTiller and Engine

1. To stop the wheels and tines, release

the ForwardClutch Bailor the Reverse

ClutchControl- whichever is engaged.

2. To stop the engine, movethe throttle control leveron engineto "OFF"or

"STOP" position.

Section4: Operation

TillingTips& Techniques

Letthetiller dothe work

* While tilling, relax and let thewheels

pull the tiller along whilethe tines do

the digging. Walk on the sidethat is

notyet finished (to avoid making foot- prints in the freshly tilled soil) and lightly, but securely grip the handlebar

with just one hand.SeeFigure4-2.

oAvoid thetemptation to push down on

the handlebarsin anattempt to force the tiller to dig deeper. Doing sotakes the weight off the poweredwheels, causing them to losetraction. Without the wheels helpingto hold the tiller

back,the tines will attempt to propel

the tiller backward towardthe

operator- often causingthe tiller to

skip rapidly acrossthe ground.

Tilling depths

• When preparing the soil, till a fresh pathon each passrather than overlap- ping passes. This gives the wheels

maximum traction on undisturbed soil. SeeFigure4-6. Dig asdeeplyas

possible on eachpass without over- loadingthe engine. Later passescan

be overlapped. (Watering the garden

area afew days prior to tilling will

maketilling easier,as will letting the newly worked soil set for a day or two beforemaking a final, deeptilling

pass.)

• When cultivating (breakingupthe

surfacesoil around plantsto help

destroyweeds), adjustthe tinesto dig only1-1/2"to 2" deep. Usingshallow

tilling depths helpspreventinjuryto

plantswhose rootsoftengrow closeto

thesurface. If needed,lift up on the

handlebarsslightly topreventthe tines from digging toodeeply. Cultivatingon

a regularbasisnotonlyeliminates weeds,it also loosensandaeratesthe soilfor bettermoistureabsorptionand fasterplantgrowth.

Avoidtilling soggy,wetsoil

Tilling wet soil often results in large,

hardclumps of soil that can interfere with planting. If time permits, wait a day or two after heavyrainsto allow the soil to dry before tilling. Test soil by squeezing it into a ball. If it compresses too easily, it istoo wet to till.

Avoidmakingfootprints

Wheneverpossible,walk onthe untilled side ofthe unitto avoid makingfoot-

prints inyour freshly tilled or cultivated soil. Footprintscausesoil compaction that can hamperroot penetrationand contribute to soil erosion. Theycan also "plant" unwantedweed seedsback into thefreshly tilled ground.

Choosingcorrectwheel andtine speeds

With experience,you will find the "just

right" tilling depth andtilling speed combination that is bestfor your garden.

Setthe enginethrottle leverat a high enough speed to give theengine adequatepower andyet allow it to operatewithout overloading it. Fastest engine speedsmay bedesirablewhen

makingfinal passesthrough the seedbedor when cultivating. Selection of the correct engine speed, in relation to the tilling depth,will ensurea suffi- cient power levelto do the job without causing the engineto labor.

Suggestedtilling patterns

• When preparinga seedbed,go over

the same pathtwice inthe first row, then make individual passesright next to eachother (see Figure4-6). When

finished in one direction, makesecond passesata right angle asshown in

Figure4-7.

In very hardground it may takethree or four overlapping passesto thor- oughly pulverizethe soil. (SeeFigure 4-8.)

• If the garden sizewill not permit lengthwiseand then crosswisetilling,

then overlapthe first passesby one-

halfa tiller width, followed by succes-

sive passesat one-quarter width (see

Figure4-8).

• With planning,you canallow enough room betweenrows to cultivate (see Figure4-9). Leaveroom for the hood

width, plus enough extra roomfor future plantgrowth.

Figure4-6

Figure4-7

Figure4-8

Figure4-9

Section4: Operation

TillingTips& Techniques

Clearing the tines

Dry grass, stringy stalks or tough vines may becometangled in the tines. Follow these proceduresto help avoidtangling andto cleanthe tines, if necessary.

•To reducetangling, set the depth regulatorto maximum depth.

• While tilling, try swayingthe handle- barsfrom sideto side (about6" to 12").

This "fishtailing" action often clears the tines of debris.

• If tangling occurs, lift the tines out of

the soil and run the tiller in reversefor

afew feet. This may unwind a good dealof debris.

• It may be necessaryto removethe debris by hand (a pocket knife will help

you to cut away the material).

WARNING

Before clearing the tines by hand, stop the engine, allow

all moving parts to stop and disconnect the spark plug

wire. Failure to follow this warning

could result in personal injury.

Tilling on slopes

If you must garden on a moderateslope, pleasefollow two very important guide-

lines:

1.Till only on moderateslopes, neveron steep ground where footing is difficult

(review safety rules in the "Safety"

section of this manual).

2. We recommendtilling up and down slopes rather than terracing. Tilling vertically on a slope allows maximum

planting areaand also leavesroom for

cultivating.

IMPORTANT:When tilling on slopes, be

sure the correct oil level is maintainedin the engine (checkevery one-half hour of

operation). The inclineof theslope will

causethe oil to slant awayfrom its

normal leveland this can starve engine parts of required lubrication. Keepthe

engine oil level at thefull point at all times!

A. Tilling upand downslopes:

• To keepsoil erosionto a minimum, be

sure to add enough organic matter to the soil so that it has good moisture-

holding texture and try to avoid leaving

footprints or wheel marks.

• When tilling vertically, try to makethe

first passuphill asthe tiller digs more deeplygoing uphill than it does downhill. Insoft soil or weeds,you

may haveto lift handlebars slightly

while going uphill.

B. Tilling acrossslopeswithout usingterraces:

If previously describedtilling methods

aren't practicalfor you, thenyou can till

laterallyacross a slope. However,we don't really recommend this method as it cancreate unsurefooting and invites

soil erosion.

Section4: Operation

LOADINGANDUNLOADINGTHE TILLER

WARNING

Loading and unloading the

tiller into or from a vehicle is potentially hazardous. We

don't recommend doing so unless absolutely necessary,

as this could result in person- al injury or property damage.

However, if you must load or

unload the tiller, follow the guidelines given next.

• Before loading or unloading, stop the

engine,wait for all parts to stop moving, disconnect the spark plug wire and let the engine and muffler cool.

•Thetiller is too heavyand bulky to lift safelyby one person.Two or more peopleshould sharethe load.

• Usesturdy ramps and manually (engine shut off) roll the tiller into and out of the vehicle. Two or more people are needed

to do this.

• Rampsmust be strong enough to support the combined weight of the tiller and any handlers.The ramps should

providegood traction to prevent slipping; they should haveside railsto guide the tiller along the ramps; and they should havea locking deviceto

secure them to the vehicle.

• The handlers should wearsturdy footwear that will helpto prevent slipping.

• Position the loading vehicle sothat the

rampangle is asflat as possible (the less incline to the ramp,the better).

Turn thevehicle's engine off and apply

its parking brake.

° Whengoing up ramps, stand in the

normal operating position and push the

tiller aheadof you. Havea person at eachsideto turn the wheels.

Whengoing down ramps, walk backwardwith thetiller following you. Keepalert for any obstacles behind you. Position a person at eachwheel to control the speed ofthe tiller. Nevergo down ramps tiller-first, as the tiller could

tip forward.

Usewooden blocksto placeon the downhill side of the wheels if you need

to stop the tiller from rolling down the

ramp. Also, usethe blocks to temporar- ily keepthe tiller in place on the ramps (if necessary),and to chock the wheels in placeafter the tiller is in thevehicle.

Whenthe tiller is in the vehicle, prevent it from rolling by chocking thewheels with blocks and securelytie the tiller

down.

Maintenance

WARNING

Before inspecting, cleaning or servicing the

machine, shut off engine,

wait for all moving parts to

come to a complete stop, disconnectspark plug wire

and move wire away from spark plug.

Failure to follow these instructions can result in

serious personal injury or propertydamage.

REQUIRED MAINTENANCE SCHEDULE

PROCEDURE

Checkengine oil level

Cleanengine Checkdrive belttension

Checknuts and bolts

Changeengine oil Lubricate tiller

Serviceengine aircleanersystem

Checkgearoil levelin transmission

Checktines for wear Checkair pressure in tires

(if pneumatic)

Servicespark plug CheckAnti-Reverse Stake

Before

Each

Use

Every

Hours

Every

Hours

Noted

And every 5

operating hours

t- 1-

* Changemore frequently in dusty or dirty conditions, Changeafter first 2 hours of

break-in operation,

1- Checkafter first 2 hours of break-in operation,

A SeeEngine Owner'sManual for serviceintervals and instructions.

Section5: Maintenance

WARNING Before inspecting,cleaning or servicing the unit, shut off engine, wait for all

partsto come to a completestop, disconnectspark plugwire and movewire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.

TILLERLUBRICATION

Proper lubrication of the tiller is an essentialpart of maintenance. After every 10 operating hours, oil or grease

the lubrication points shown in Figures

5-1 and 5-1A and describedbelow. Usea good quality lubricating oil (#30

weight engineoil is suitable) anda quality generalpurpose grease(with a metal lubricant, if available).

,, Removewheels, clean wheel shaft (A,

Fig.5-1) and applythin coating of

greaseto the shaft.

,, Greaseback,front andsides of depth

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

,, Removetines, clean tine shafts (C,Fig.

5-1). Inspectfor rust, rough spots or

burrs (look around holes). Fileor sand

smooth, coat ends of shaft with grease.

,, Oil the threads on the handlebarheight

adjustment screws and the handlebar attaching screws (D, Fig.5-1).

• ShiftingMechanism.Lightlyoil pivot pointsfor smoothoperation(E,Fig.5-1A).

Figure5-1

Figure5-1A

CHECKFOROILLEAKS

Beforeeachuse,checkyour tiller for signs of an oil leak- usually a dirty, oily

accumulation either on the unit or on the

floor where it hasbeen parked. A little seepagearound a cover or oil seal

is usually nota causefor alarm. However, if the oil drips overnight then immediate attention is neededas ignoring a leakcan result in severetransmission damage.

If a cover is leaking,try tightening any loosescrews. If the screws are tight, a newgasketor oil seal may berequired. If

the leak is from around a shaft and oil

seal,the oil sealprobably needsto be replaced. Seeyour authorizeddealer or contact the factory for serviceor advice.

IMPORTANT:Neveroperatethetiller if

the transmission is low on oil. Checkthe

oil levelafter every 30 hours of operation andwhenever there isany oil leakage.

CHECKHARDWARE

Checkfor looseor missing hardware after every 10 operating hours. Tighten or replacehardwarebefore usingthe tiller.

Besure to check the screws underneath

the tiller hood (lift the hoodflap) that

securethe transmission cover andthe depth regulator leverto the transmission.

CHECKTIREPRESSURE(on

machines equipped with pneumatic tires)

Checkthe air pressure in both tires. Deflateor inflate both tires evenly from 15-to-20 PSI (pounds persquare inch).

Besure that bothtires havethe sameair pressure or the unit will tend to pull to

oneside. NOTE:Yourtiller may not beequipped

with pneumatictires, eliminating the need

for air pressure checks.

TRANSMISSIONGEAROILSERVICE

Checkthe transmission gear oil level after every30 hours of operation or whenever

you notice anyoil leak. Operatingthe tiller when the transmission is low on oil

canresult in severe damage.

A. To ChecktheTransmission

GearOil Level:

1. Checkthe gearoil levelwhen the trans- mission is cool. Gearoil will expand in warm operatingtemperatures andthis expansionwill provide an incorrect oil levelreading.

2. With the tiller on levelground, adjust

the DepthRegulator Lever up or downto the notch that makesthe tiller level..

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

from thetransmission housing and look

into the oil fill hole. You will seethe main drive shaft on oneside of the hole.

4. Thegear oil level is correct if the gear oil is approximately half way up the side

of the driveshaft.

5. If the gear oil level is low, add gear oil asdescribed next. Ifthe gear oil levelis okay,securely replacethe oil fill plug. IMPORTANT:Do not operatethe tiller if

the gear oil level is low. Doing so will

result in severedamageto thetransmis- sion components.

6. If adding only a few ounces of gear oil, useAPI rated GL-4or GL-5 transmis- sion gear oil having a viscosity of SAE 140, SAE85W-140 or SAE80W-90. If refilling anempty transmission, use only GL-4transmission gearoil havinga

viscosity of SAE85W-140 or SAE140.

NOTE:Do not useautomatic transmission

fluid or engine oil in the transmission.

7. While checking frequently to avoid overfilling, slowly add gear oil into the oil

fill hole until it reachesthe halfway point

on the drive shaft.

8. Securely replacethe oil fill plug.

Section5: Maintenance

WARNING Before inspecting, cleaning or servicingthe unit, shut off engine, wait for all

partsto come to a completestop, disconnectsparkplug wire and movewire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.

B. To Drainthe TransmissionGear Oil:

DANGER

Gasoline is highly flammable and its vaporsexplosive. Fol-

low these safety practices to

prevent injury or property damage from fire orexplosion.

,, Allow the engine and muffler to cool before

draining the tiller's gasoline tank.

,, Do not allow open flames, sparks, matches or smoking

in the area.

,, Wipe away spills and push tiller away from spilled fuel.

,, Use only an approved fuel container and store it safely out of the reach of children.

,, Do not store gasoline where

its vapors could reach an

open flame or spark, or where ignition sources are present (such as hot water and space heaters, furnaces,

clothes dryers, stoves, electric motors, etc.)

Thetransmission gear oil does not need to bechangedunless it hasbeencontam-

inatedwith dirt, sandor metal particles.

1. Drain gasoline from thefuel tank or run the engine until thefuel tank is empty.

See"DANGER"statementabove.

2. Drainthe oil from the engine.

3. Removethefour screws(B, Figure5-2)

and washersfrom thetransmission cover and remove thecover and gasket.

4. Removethe left-side wheel.

5. Tilt the left-side wheel shaft into a

drain panand allow the gear oil to drain through the top ofthe transmission.

6. After draining oil, reinstall the wheel, install a newgasket (do not reuse old

gasket)and screw on transmission cover.

7. Refill transmission using GL-4gear oil (SAE85W-140 or SAE140).

8. Refill theengine with motor oil and replenishthe fuel tank with gasoline.

Figure5-2: Removeoilfi// plug(A)tocheck gearoil/eve/andtoaddgearoil. Remove

fourcoverscrews(B)todraingearoil.

TINES

Thetines wear with useand they should be inspected at the beginning of each tilling seasonand after every30 operating hours. The tines can be replacedindivid- ually or asa completeset. Referto the

Parts List Section of this manualfor tine identification information.

WARNING

This is a CRT(counter-rotating tine) tiller and its tines must

be mounted in the direction

shown in Figure 5-3. If

mounted with curves in the opposite direction, tiller will

dig poorly and be more likely

to run backward.

Failure to comply could result in personal injury or property damage.

NOTE:You mustfirst removethe tiller hood before removing either a single tine

holder or individual tines. Removethe two screws at thefront of the hood and thetwo screws atthe rear ofthe hood

and lift off the hood. Besureto replace the hood securelyafter changing a tine or

tine holders.

A. Tine Inspection:

With use,the tines will becomeshorter, narrower and pointed. Badlyworn tines

will result in a loss of tilling depth and

reducedeffectiveness in general,and specifically when chopping up and turning under organic matter.

B. RemovingandInstalling TineAssemblies

1. Usea 9/16" socket,6"extension, a

ratchet,and a9/16" box end wrench to

loosenthe nut (A, Figure 5-3) and screw

(B) that secure thetine holder to the tine shaft.

2. Usea rubber mallet to tap thetine

holder loose. Slide tine assembly off.

3. RepeatSteps 1 and 2 aboveto remove the other tine assembly.

4. Installing the tine assembly issimply the reverseof its removal. First besure

to removeany rust, unevenspots or burrs from the tine shaft usingfine sandpaper. Thengreasethe tine shaft before rein- stalling thetine assemblies. Besure all the cutting edgesface so they will enter the soil first when thetiller is moving forward- this meansthe cutting edge on the top of each tine faces towardthe operator position. Tighten hardware.

C. RemovingandInstalling

IndividualTines

1. Usetwo 9/16" box end wrenchesto

removethe two screws (C, Figure 5-3) and nuts (D) that securethe tine to its

tine holder.

NOTE:Ifthe nuts are rusted,apply pene- trating oil, then loosen the hardware.

2. When installing individual tines, do so

in the reverseorder from which they were

removed. The two sets of inboard tines are installed so one set faces toward the

transmission andthe other faces away from it. Thesingle outboardtine set facestoward thetransmission housing.

Also be sure the cutting edge at thetop

of eachfine facestoward the operator position. (SeeFigure 5-3.)

Section5: Maintenance

WARNING Beforeinspecting,cleaning or servicingthe unit, shutoff engine, wait for all

partsto come to a completestop, disconnectspark plugwire and movewire away fromspark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.

TINED

OPERATOR C POSITION

ENGINE

,'_ DENOTES CUTTING EDGE _3

OF TINE |

Figure5-3: Tines,tineholdersandinstallationhardware.

Figure5-4:LiftbailandchecklengthofClutchBailSpringtocheckforcorrectbelttension

(1-7/8").

CHECKINGANDADJUSTING FORWARDDRIVEBELTTENSION

Maintaining correct tension on the forward drive belt is important to good tilling performanceand long belt life. A

loosebelt will slip on the engine and

transmission pulleys and causethe tines and wheels to slow down - or stop com-

pletely- eventhough the engine is running at full speed. A loose beltcan

also result in premature belt wear.

If you find you can not bring the Forward

ClutchBail all the way upto the bottom of

the upper handlebars,you will needto

loosenthe belt tension.

Also checkthe belt for cracks,cuts or frayed edges and replaceit assoon as

possible.

• Checkbelt tension after the first two hours of initial operation(new belt).

• Checkbelt tension after every 10 operatinghours.

To CheckForwardBeltTension:

1. Besure that the engine is stopped and

the spark plug wire is disconnectedand

moved awayfrom the spark plug.

2. Loosen nut "C" (Figure5-4) several turns so it is about halfway upthe threadedadjustment screw.

3. Lift the Forward ClutchBail up and

hold it to the bottom ofthe handlebars. Measurethe length of the clutch bail

spring (A, Figure5-4) with a ruler. If the belttension is correct, the length of the coiled portion of the spring should be

approximately 1-7/8". Nut "C" should then besnugged down againstthe top of the adjuster (B).

4. If the spring istoo short, the belt tension will betoo loose. If the spring is too long, the belttension will betoo tight.

5. To adjust the length of the spring,

releasethe ForwardClutch Bail. Thread

the hex nut (C, Fig.5-4) halfwayup the

adjustment screw. Turn the screw inside

the spring (A, Figure5-4) counterclock-

wise (as viewed from the operator's position) while holding the adjuster (B) steadyto increasethe length of the spring, or turn clockwise (asviewed from

the operator's position) to decreasethe

length ofthe spring. NOTE:If you havedifficulty holding the

adjuster steady by hand,usea pliers or wrench on the adjuster. Whileyou turn

the screw, keepthe Forward Clutch Cable

Section5: Maintenance

WARNING Beforeinspecting,cleaningor servicingthe unit, shut off engine, wait for all

partsto cometo a complete stop, disconnectsparkplugwire and movewire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.

from turning by gripping the upper endof the threadedadjuster (B) with pliers.

6. RepeatStep 3 to measurethe length of the clutch bail spring. Oncethe length is correct, retighten the hex nutagainst

the top of the adjuster.

ForwardBeltReplacementInformation

If the drive belt needsto be replaced,see

your local authorizeddealer or phonethe factory as instructed on Page2. Referto

the Parts List in the back of this manual for correct components Use only OEM

(Original Equipment Manufacturer) fre- placementbelts.A substitute belt may

not perform satisfactorily. Theprocedure requiresaveragemechanicalability and

commonly availabletools.

FORWARDCLUTCH BAILADJUSTMENT

If the ForwardClutch Bail doesnot

function properly, first checkthat the forward drive belt is adjusted properly

(see"Checkingand Adjusting Forward Drive Belt Tension"). If this fails to

correct the problem, contact the factory technical service departmentor your

authorized dealerfor service advice.

CHECKINGANDADJUSTING REVERSEDRIVEBELTTENSION

Maintaining correct tension on the reversedrive belt is important to good performanceand long belt life. A loose belt will slip on the engine andtransmis-

sion pulleys and causethe tines and wheels to slow down- or stop com-

pletely- eventhough the engine is running at full speed. A loose belt can

also result in premature belt wear.

If there is no reverseaction when the ReverseClutch Control knob is pulled

out, then the belttension istoo loose.

When checking belttension, also check the belt for cracks,cuts or frayed edges and replace it assoon as possible.

* Checkbelttension after the first two

hours of break-in operation (new belt).

- Checkbelttension after every 10 operatinghours.

To CheckReverseBeltTension:

1. Be surethat the engine is stopped and

the spark plug wire is disconnectedand

moved awayfrom the spark plug.

2. Removethe screw in the plastic belt cover and slidethe cover (which is attachedto the forward clutch cable) out of the way.

3. Havean assistant pull the Reverse ClutchControl knoball theway out and hold it in that position. Measurethe length of thecablewire betweenthe end of thethreaded cableadjuster (A, Figure 5-5) andthe end ofthe Z-fitting (B) to

which the cablewire is attached.

4. The belttension is ideal if the cable wire length measuresbetween1/8"to

1/4". If the length is lessthan 1/8" (and if

there is no reverseaction when the tiller

is running), then makethefollowing adjustments. NOTE:If the length is more

than 1/4", no adjustment is needed,as

long as the reverseaction functions properly.

5. Releasethe ReverseClutch Control knob. Unthreadthe inner jam nut (C,

Figure5-6) oneto two turns and pull the threaded cableadjuster (A, Figure5-6) to the left until the inner jam nut rests

againstthe bracket.

6. Preventthe inner jam nut (C) from

turning and tighten the outer jam nut (D)

againstthe bracket. Preventthe outer jam nut (D) from turning and tighten the

inner jam nut (C) against the bracket.

7. Measurethe gap by repeatingStep 3.

Readjustasneededby repeatingSteps5

and 6.

8. Reinstall the beltcover.

Figure5-5: Measure cable wire lengthto checkfor correctreverse belt tension.

Figure5-6: Move threaded adjuster (,4)to left to

increasebelt tension.

ReverseBeltReplacementInformation

If the drive belt needsto be replaced,see your local authorizeddealer or phonethe factory as instructed on Page2. Referto

the Parts List in the back of this manual for correct components Use only OEM

(Original Equipment Manufacturer) fre-

placementbelts.A substitute belt may

not perform satisfactorily. Theprocedure

requiresaveragemechanicalability and commonly availabletools.

Section5: Maintenance

WARNING Before inspecting,cleaningor servicing the unit, shutoff engine, wait for all

partsto cometo a completestop, disconnectspark plugwire and movewire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.

ENGINEOILSERVICE

Checkthe engine oil levelbeforestarting

the engine eachday and check it after each

5 hours of continuous operation. Running

the engine when it is low on oil will quickly

ruin the engine. It is recommendedthat you changethe

motor oil after every 10 hours of operation and evensooner when operating in extremely dirty or dusty conditions. Refer

to the separateEngineOwner's Manualfor

detailedservice instructions.

A. To Checkthe Engine0il Level:

1. Move thetiller to a levelareaand shut

off the engine.

2. Levelthe engine by adjusting the Depth Regulator Lever. The tines must be in contact with the ground. Move the Anti- ReverseStake backif necessary.

3. Cleanthearea aroundthe oil dipstick or oil fill tube to prevent dirt from falling into

the crankcase.

4. Onengineswith an oil fill tube, remove

the filler cap, add oil (if required) until it

reachesthetop of the tubeand reinstall the

filler cap.

5. Onengineswith a dipstick, remove it, wipe it clean,and reinstall it finger-tight. Removethe dipstick and checkthe reading.

Add oil (if required) to bring the levelto the

FULLmark. Do not overfill.

B. To Changethe Engine0il:

Changethe engine oil as instructed in the separateEngineOwner's Manual.

ENGINECLEANING

Keepthe engine clean to assure smooth operationand to prevent damagefrom overheating. Referto the separateEngine Owner's Manualfor specific repair and cleaninginstructions. All inspections and services must be done with the engineshut

off and cool to the touch.

AIR CLEANERSERVICE

Theengine air cleanerfilters dirt and dust

out of the air before it enters the carbure-

tor. Operatingthe enginewith a dirty,

cloggedair filter cancause poor perfor- manceand damageto the engine. Never operatethe engine without the air cleaner installed. Inspect and servicethe air cleanermore often if operating in very dusty or dirty conditions.

Servicethe air cleaneras instructed in the separateEngineOwner's Manual.

SPARKPLUGSERVICE

Inspect and cleanor replacethe spark plug after every 100 operating hours or annually. Cleanthe plug and set the gap as described in the separateEngineOwner's

Manual. In some areas,locallaw requires using

resistor spark plugsto suppress ignition signals. If the engine was originally equippedwith a resistor spark plug, use

the same typefor replacement.

SPARKARRESTERSCREENSERVICE

If the engine muffler is equipped with a spark attester screen, remove and cleanit according to the time intervalsand instruc-

tions in the separateEngineOwner's

Manual.

THROTTLELEVERADJUSTMENT

If the engine does not respondto various

throttle leversettings, referto the separate

EngineOwner's Manualfor service infor- mation or contact your local authorized engineservice dealer.

CARBURETOR/GOVERNORCONTROL

ADJUSTMENTS

Thecarburetor was adjusted at thefactory for best operating speed. Referto the

separateEngineOwner's Manualfor any adjustment information or seeyour autho- rizedengine service dealer.

The governor controls the maximum

safe operating speed and protects the engineand all moving parts from damagecaused by overspeeding. Do not tamper with the engine governor settings.

WARNING

Operators shall not tamper with the engine governor

settings on the machine; the governor controls the maximum safe operating

speed to protect the engine and all moving parts from damage caused

by overspeed. Authorized service shall be sought if a

problem exists.

OFFSEASONSTORAGE

Whenthetiller won't be usedfor extendedperiods, prepareit for storage

asfollows:

1. Cleanthe tiller and engine.

2. Do routine tiller lubrication and check

for looseparts and hardware.

3. Protect the engine and perform rec-

ommended engine maintenanceby following the engine storage instruc- tions found in the separate Engine

Owner's Manual. NOTE:Besureto

protect the fuel lines, carburetor and fuel tank from gum deposits by

removing fuel or bytreating fuel with a fuel stabilizer (follow engine manufac- turer's recommendations).

4. Store unit in a clean, dry area.

5. Neverstore the tiller with fuel in the

fuel tank in anenclosed areawhere gas fumes could reach an open flame or

spark, or where ignition sources are

present (space heaters,hotwater

heaters,furnaces, etc.).

Section5: Maintenance

TROUBLESHOOTING

Before performing any corrections, refer to the appropriate information in this Manual, or in the Engine Owner's Manual, for the correct safety precautions and operating or maintenance procedures. Contact your local authorized Engine Service Dealer for engine service. Contact your local authorized equipment dealer or the factory for all other service problems.

PROBLEM

Enginedoes notstart.

Enginerunspoorly.

Engineoverheats.

POSSIBLE CAUSE CORRECTION

1. Sparkplug wire disconnected.

2. EngineThrottleControlLeverincorrectlyset.

3. Fueltankempty.

4. Chokecontrol (ifso equipped)in incorrectposition.

5. Stalegasoline.

6. Dirty airfilter(s).

7. Defectiveor incorrectlygappedspark plug.

8. Carburetorout of adjustment.

1. Reconnectwire.

2. Put leverin STARTposition.

3. Addfuel.

4. SeeEngineOwner'sManual.

5. Drainfueland addfreshfuel.

6. Cleanor replacefilter(s).

7. Inspectsparkplug.

8. SeeEngineServiceDealer.

9. Misadjustedthrottlecontrol cable.

10.Dirtor waterin fueltank.

9. SeeEngineServiceDealer

10. SeeEngineServiceDealer.

Defectiveor incorrectlygappedsparkplug. 1. Dirtyairfilter(s). 2. Carburetorout of adjustment. 3.

Stalegasoline. 4. Dirtor water in fueltank.

Enginecoolingsystemclogged.

1. Enginecoolingsystemclogged.

2. Carburetorout of adjustment.

3. Oillevelis low.

Inspectsparkplug (seeEngineOwner'sManual). Cleanor replace(seeEngineOwner'sManual). SeeEngineServiceDealer.

Replacewith fresh gasoline. SeeEngineServiceDealer. Cleanair coolingsystem (seeEngineOwner'sManual).

1. Cleanair coolingarea(seeEngineOwner'sManual).

2. SeeEngineServiceDealer.

3. Checkoil level(seeEngineOwner'sManual).

Enginedoesnot

shutoff. 1. Misadjustedthrottle control or ignition switch. 1. SeeEngineOwner'sManualor EngineServiceDealer.

WheelsandTines 1. Improperuseof controls. 1. ReviewSections3and 4. will notturn. 2. Worn,broken, or misadjusteddrivebelt(s). 2. See"CheckingDriveBeltTension,"Section5.

3. Internaltransmission wearor damage. 3 Contactlocaldealerorthe factory.

4. Boltloosein transmissionpulley. 4. Tightenbolt.

Tinesturn, but 1. WheelDrivePinsnot in WHEELDRIVE. 1. See"WheelDrivePins"in Section3. wheelsdon't. 2. Internaltransmission wearor damage. 2. ContactlocalDealerorthe Factory.

WheelsTurn,but 1. Tine holdermounting hardwaremissing. 1. Replacehardware. TinesDon't. 2. Internaltransmissionwearor damage. 2. ContactlocalDealerorthe Factory.

1. Worntines.

2. ImproperDepthRegulatorsetting.

3. Incorrectthrottle setting.

4. ForwardDriveBelt slipping.

Poortilling performance.

1. See"Tines"(Section5).

2. See"TillingTips &Techniques,"Section4.

3. SeeSection4.

4. See"CheckingForwardDriveBelt Tension,"Section5.

PartsList

7 _\

2 20

7 21

MODELS644H & 645A

REF

NO.

1 2

3 4 5 6

7 8

9 10 11

12 13

14 15

16 17 18 19 20 21 22 23

24 25

26 27

PARTNO. DESCRIPTION

1185469 710-0597 710-0599 710-0874 1186331 712-0291 712-3004A 712-3009 736-0119 GW-55013-1 GW-55013-2 GW-55015 GW-55018 686-04029 GW-55088 GW-9384 GW-9534 710-04048 618-04046 786-04191 1916570 710-3073 1916771 1107382 710-3025 1916708 1916707

Spirol Pin HexHd.Screw, 1/4-20x 1 Screw,Self-Tapping,I/4-20 x 1/2 HexHd.Screw,5/16-18 x 1-1/4 HexHd.Screw,5/16-18 x 1.0 HexLock Nut, 1/4-20 HexFlangeLock Nut,5/16-18 HexNut, 5/16-18 LockWasher, 5/16 Hood Bracket,Left Hand Hood Bracket,Right Hand DragBar DepthRegulatorLever

Tine HoodAssembly

Bushing Spring, Depth Regulator Spacer HexHd.FlangeScrew, 5/16-18 x 1

Transmission Assembly (CRT)

FlapStop Bracket ReverseStop Arm HexScrew,5/16-18 x 2.25 Spacer,.462 x .328x 1.63 FlatWasher,5/16 HexScrew,5/16-18 x .625 Hood Support Bracket ChannelSupport Bracket

MODELS644H & 645A

REF

NO.

1 2

3 4 5 6

7 8

9 10 11 12 13

14 15

16 17 18 20

21 22

23 25

PARTNO. DESCRIPTION

1916719 1916755 747-04210 1918745 710-0599 710-3008 712-3009 786-04188 GW-55043 786-04200 GW-55044 GW-9855 725-0157 736-3050 732-04040 732-04185 710-0106 710-0216 710-0805 712-0121 712-0291 712-3000 736-0119

OableAssembly, ReverseOlutch UpperHandlebar Bail,Forward Olutch OableAssembly, Forward Olutch Screw,Self-Tapping,I/4-20 x 1/2 Screw,Hex,5/16-18 x 3/4 HexLock Nut, 5/16-18 HandlebarSupport

Lower Handlebar Panel

Tab, Oonduit Mount

Screw,#10-24 x 2 OableTie

FlatWasher,3/8 Bracket,ReverseOlutchOable Spring,Forward Olutch HexHd.Screw, 1/4-20x 1-1/4 Screw,Hex,3/8-16 x 3/4 Screw,Hex,5/16-18 x 1-1/2 HexNut,#10-24 HexLock Nut, 1/4-20 HexNut, 3/8-16 LockWasher, 5/16

REF NO.

PART NO.

1918749 710-0395

712-0267 736-0119

DESCRIPTION

Bumper HexScrew,5/16-18 x 2-1/4, Gr5

Nut,Hex,5/16-18 LockWasher,5/16

MODELS644H & 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-13250

PARTNO. DESCRIPTION

SnapRing Bearing,Tapered Roller(with race) Support Washer, Rear DriveShaft (ORT) Shim, RearBearingOap,.010"thick Shim,sameasabove,except .030"thick Shim,sameasabove,except .005"thick Shim,sameasabove,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.

MODELS644H & 645A

FRONT

REF

NO.

1 2

4 5

6 7 8 9 10 11

PARTNO. DESCRIPTION

GW-9512 1909950 GW-1166-1* GW-1166-2" GW-1166-3" GW-1166-4" GW-1166-5" GW-1086 711-04092 GW-9305 GW-1132-2 1904278 711-04078 GW-1104 1916542

Retainer,Snap Ring, "E" Type Retainer,Snap Ring Shim,0.062"thick Shim,0.030"thick Shim,0.015"thick Shim,0.010"thick Shim,0.005"thick BronzeBushing

Wheel Shaft(CRT)

Key,Hi-Pro, 1/4 x 1 Spacer

Worm Gear,WheelShaft Tiller Shaft

Woodruff Key Worm Gear,Tiller Shaft

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

MODELS644H & 645A

* Includedwith transmission when purchasedas an assembly only.

Removeand discard when installing the transmission on tiller.

REF

PART NO.

NO.

1 GW-9727

2 710-04049

3 736-0119

4 1918377

5 1916641

6 GW-50032

7 721-04030

DESCRIPTION

REF NO.

Plug,Transmission OilFill 8 HexHd.FlangeScrew,5/16-18 x 5i8,Gr. 5 9 LockWasher,5/16 10

RearCover,Transmission 11 Front Cover,Transmission 12 Gasket,Housing Cover 13 Oil Seal,DriveShaft 14

PARTNO.

721-04031 619-04013 721-04036 736-3008" 718-04008 710-04048 710-3008

DESCRIPTION

Oil Seal,Wheel Shaft Transmission Housing Assembly Oil Seal,Tine Shaft Washer,Flat, .344 x .750 x .120

RearBearingCap Hex Hd. FlangeScrew,5/16-18 x 1 Hex Hd. FlangeScrew,5/16-18 x 3/4

HoldTinesWith Cutting Edgeat theTOP

of eachtine facing TOWARDYou

MODELS644H & 645A

FRONT/

FORWARD

WHEELSHAFT

REF NO.

1 2 3 4 5 6 7 8

ENGINE

'_ ENOTES CUTTING EDGE

OF TINE

PART NO.

710-3008 1817060 712-3009 710-3096 1817059 1916702 1916703 1917487

DESCRIPTION

HexHd.Screw,5/16-18 x 3/4, Grade5

Single Tine - Right Hand

HexLock Nut, 5/16-18 HexHd.Screw,3/8-16 x 2

Single Tine - Left Hand

LHTineHolder RHTine Holder

Wheel& TireAss'y-- Left/Right Side

REF

NO.

9 10 11

PART NO.

GW-9380 GW-9338 712-3000 642-04005

642-04006

DESCRIPTION

ClevisPin, .312"x 1-3/4"

HairPin Cotter

HexLock Nut, 3/8-16 RHTineAssembly (incl. two RHtines and

one LHtine assembledto RHtine holder) LH Tine Assembly(incl. two LHtines and one RHtine assembledto LHtine holder)

MODELS644H & 645A

,3O

MODELS644H & 645A

REF

NO.

1 2

3 4 5 6

7 8

9 10 11

12 13

14 15

16 17 18 19 20 21 22 23

24 25

26 27 28 29 30 31 32 33 34 35 36 37 38 39 40

PARTNO. DESCRIPTION

736-0159 1108841 619-04016 1916532 1916535 1916652 1916657 1916658 1916660 1916724 1916725 1916726 1916794 1916795 1917326 1917746 1918731 1918744 710-0117 710-0237 710-0376 710-04049 710-0520 710-0599 710-3103 712-3000 712-3009 736-0119 736-3050 736-3090 736-0452 710-0459A GW-50027 GW-55034 GW-55049 GW-9090 GW-9301 736-3078 GW-9944 710-0395

FlatWasher,5/16 Key,3/16"x 1-1/2" Pulley,EngineDrive

Transmission Pulley

Pulley, ReverseIdler Guard,Belts/Pulleys

ForwardDriveBelt ReverseDrive Belt BeltCover

ReverseReturn Spring BeltGuide

ForwardBeltGuide EngineBracket, Left

EngineBracket, Right Bracket,BeltCover

ShoulderWasher ReverseIdler Arm ForwardIdler Lever

HexHd.Screw,5/16-24 x 1 HexHd.Screw,5/16-24 x 5/8 HexHd.Screw,5/16-18 x 1 HexHd.Screw,5/16-18 x 5/8 HexHd.Screw,3/8-16 x 1-1/2 Screw,Self-Tapping,1/4-20 x 1/2 HexHd.Screw,5/16-18 x 2 Lock Nut, 3/8-16 Lock Nut, 5/16-18 LockWasher, 5/16 FlatWasher,3/8

FlatWasher BellWasher

HexHd.Screw,3/8-24 x 1.5, GR5 Support Washer ForwardReturn Spring Bracket,Cable Mounting ForwardIdler Pulley Key,3/16" x 1"

FlatWasher BellevilleWasher

HexScrew,5/16-18 x 2.25 Gr5

TROY-BILT TILLER LIFETIME LIMITED WARRANTY

WHAT PRODUCT IS COVERED

WHAT IS COVERED BY THIS WARRANTY

WHAT IS NOT COVERED BY THIS WARRANTY

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,

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

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,

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, 1-800-520-5520, 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, 1-800-520-5520

Troy-Bilt PRO LINE 644HMBRONCO, PRO LINE 645AMBRONCO, PRO LINE Bronco 644H, PRO LINE Bronco 645A Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual