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

0 TRtllcBILT' ----

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).

+ 25 hidden pages

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