Troy Bilt Tiller 630B Tuffy 634F Bronco 634B Super Bronco User Manual

Operator’s Manual

Rear-tine Tiller Models

630B—Tuffy^®

634F—Bronco^TM

634B—Super Bronco^TM

Model 634B Shown

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-cov-

ered 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. 770-10594A

(12/2001)

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Section

Safety

This machine meets voluntary safety standard

B71.8 – 1996, which is sponsored by the Outdoor

Power Equipment Institute, Inc., and is published

by the American National Standards Institute.

Reverse Clutch

Control (Models

634F/634B)

Forward Clutch Bail

WARNING

Depth Regulator

The engine exhaust from this product contains

chemicals known to the State of California to cause

cancer, birth defects or other reproductive harm.

Tine Hood Flap

Safety Alert Symbol

Standard-Rotating-

Tines (SRT)

This is a safety alert symbol. It is used in this

manual and on the unit to alert you to poten-

tial hazards. When you see this symbol, read

and obey the message that follows it. Failure

to obey safety messages could result in

personal injury or property damage.

Wheel Drive Pin

(on each wheel)

Figure 1-1: Tiller features and controls (5.5HP Model shown). See separate

Engine Owner’s Manual to identify engine controls.

wearing adequate outer garments. Avoid

loose garments or jewelry that could get

caught in moving parts.

e. Replace all fuel tank and container

Training

caps securely.

1. Carefully read this Owner’s

Manual, the separate Engine

f. If fuel is spilled, do not attempt to

start the engine, but move the

machine away from the area of

spillage and avoid creating any

source of ignition until fuel vapors

have dissipated.

4. Do not operate the tiller when barefoot

or wearing sandals, sneakers, or light

footwear. Wear protective footwear that

will improve footing on slippery surfaces.

Owner’s Manual, and any

other literature you may receive. Be thor-

oughly familiar with the controls and the

proper use of the tiller and its engine.

Know how to stop the unit and disengage

the controls quickly.

5. Do not till near underground electric

cables, telephone lines, pipes or hoses. If

in doubt, contact your telephone or utility

company.

7. Never make adjustments when engine

is running (unless recommended by

manufacturer).

2. Never allow children to operate the

tiller. Never allow adults to operate the

tiller without proper instruction.

6. Warning: Handle fuel with care; it is

highly flammable and its vapors are explo-

sive. Take the following precautions:

Operation

1. Do not put hands or feet near or under

rotating parts.

3. Keep the area of operation clear of all

persons, particularly children and pets.

a. Store fuel in containers specifically

4. Keep in mind that the operator or user

is responsible for accidents or hazards

occurring to other people, their property,

and themselves.

designed for this purpose.

2. Exercise extreme caution when on or

crossing gravel drives, walks, or roads.

Stay alert for hidden hazards or traffic. Do

not carry passengers.

b. The gas cap shall never be removed

or fuel added while the engine is run-

ning. Allow the engine to cool for

several minutes before adding fuel.

c. Keep matches, cigarettes, cigars,

pipes, open flames, and sparks

away from the fuel tank and fuel

container.

d. Fill fuel tank outdoors with extreme

care. Never fill fuel tank indoors.

Use a funnel or spout to prevent

spillage.

Preparation

1. Thoroughly inspect the area where the

tiller is to be used and remove all foreign

objects.

3. After striking a foreign object, stop the

engine, remove the wire from the spark

plug wire and prevent it from touching the

spark plug. Thoroughly inspect the

machine for any damage and repair the

damage before restarting and operating

the machine.

2. Be sure all tiller controls are released

and both wheels are in the Wheel Drive

position before starting the engine.

3. Do not operate the tiller without

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Section 1: Safety

4. Exercise caution to avoid slipping or

falling.

operating precautions to assist you in

maintaining control of the tiller:

24. Do not touch engine parts which may

be hot from operation. Let parts cool down

sufficiently.

5. If the unit should start to vibrate abnor-

mally, stop the engine, disconnect the

spark plug wire and prevent it from

touching the spark plug, and check imme-

diately for the cause. Vibration is gener-

ally a warning of trouble.

a. Walk behind and to one side of the

tiller, using one hand on the han-

dlebars. Relax your arm, but use a

secure hand grip.

b. Use shallower depth regulator set-

tings, working gradually deeper

with each pass.

c. Use slower engine speeds.

d. Clear the tilling area of all large

stones, roots and other debris.

e. Avoid using downward pressure on

the handlebars. If need be, use

slight upward pressure to keep the

tines from digging too deeply.

f. Before contacting hard packed soil

at the end of a row, reduce engine

speed and lift the handlebars to

raise the tines out of the soil.

g. In an emergency, stop the tines and

wheels by releasing whichever

clutch control is engaged. Do not

attempt to restrain the tiller.

25. Please remember: You can always

stop the tines and wheels by releasing the

Forward Clutch Bail or on Models 634F

and 634B the Reverse Clutch control,

(whichever control is engaged), or by

moving the ignition switch and/or throttle

control lever on the engine to “OFF” or

“STOP”.

6. Stop the engine, disconnect the spark

plug wire and prevent it from touching the

spark plug, whenever you leave the oper-

ating position, before unclogging the tines,

or when making any repairs, adjustments

or inspections.

26. To load or unload the tiller, see the

instructions in Section 4 of this Manual.

27. Use extreme caution when reversing

or pulling the machine towards you.

7. Take all possible precautions when

leaving the machine unattended. Stop the

engine. Disconnect the spark plug wire

and move it away from the spark plug. Be

sure that both wheels are in the Wheel

Drive position.

28. Start the engine carefully according to

instructions and with feet well away from

the tines.

29. Never pick up or carry a machine

while the engine is running.

8. Before cleaning, repairing, or

inspecting, stop the engine and make cer-

tain all moving parts have stopped. Dis-

connect the spark plug wire and prevent it

from touching the spark plug to prevent

accidental starting.

Maintenance and Storage

1. Keep the tiller, attachments and acces-

sories in safe working condition.

15. Do not overload the tiller’s capacity by

attempting to till too deeply at too fast a

rate.

2. Check all nuts, bolts, and screws at

frequent intervals for proper tightness to

be sure the equipment is in safe working

condition.

9. The flap on the tine hood must be down

when operating the tiller.

16. Never operate the tiller at high trans-

port speeds on hard or slippery surfaces.

Look behind and use care when backing

up.

10. Never use the tiller unless proper

guards, plates, or other safety protective

devices are in place.

3. Never store the tiller with fuel in the fuel

tank inside a building where ignition

sources are present such as hot water and

space heaters, furnaces, clothes dryers,

stoves, electric motors, etc.). Allow the

engine to cool before storing the unit in

any enclosure.

11. Do not run the engine in an enclosed

area. Engine exhaust contains carbon

monoxide gas, a deadly poison that is

odorless, colorless, and tasteless.

17. Do not operate the tiller on a slope

that is too steep for safety. When on

slopes, slow down and make sure you

have good footing. Never permit the tiller

to freewheel down slopes.

12. Keep children and pets away.

4. To reduce the chances of a fire hazard,

keep the engine free of grass, leaves, or

18. Never allow bystanders near the unit.

13. Never operate the tiller under engine

power if the wheels are in the Freewheel

position. In the Freewheel position, the

wheels will not hold the tiller back and the

revolving tines could propel the tiller

rapidly, possibly causing loss of control.

Always engage the wheels with the wheel

drive pins in the Wheel Drive position

before starting the engine or engaging the

tines/wheels with the Forward Clutch Bail

(all models) or the Reverse Clutch control

(Models 634F/634B only).

19. Only use attachments and accessories excessive grease.

that are approved by the manufacturer of

5. Store gasoline in a cool, well-ventilated

area, safely away from any spark- or

20. Use tiller attachments and accessories flame-producing equipment. Store gaso-

the tiller.

when recommended.

line in an approved container, safely away

from the reach of children.

21. Never operate the tiller without good

visibility or light.

6. Refer to the Maintenance sections of

this Manual and the separate Engine

Owner’s Manual for instructions if the unit

is to be stored for an extended period.

22. Never operate the tiller if you are tired;

or under the influence of alcohol, drugs or

medication.

7. Never perform maintenance while the

engine is running or the spark plug wire is

connected, except when specifically

instructed to do so.

14. Be aware that the tiller may unex-

pectedly bounce upward or jump forward

if the tines should strike extremely hard

packed soil, frozen ground, or buried

obstacles like large stones, roots, or

stumps. If in doubt about the tilling con-

ditions, always use the following

23. 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.

8. If the fuel tank has to be drained, do

this outdoors.

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Section 1: Safety

Decals

Reverse Clutch Control

Operating Instruction

(Models 634F/634B)

For your safety and the safety of

others, various safety and opera-

tional decals are located on your

unit (see Figure 1-2).

Forward Clutch Bail

Operating Instruction

Keep the decals clean and legible at

all times. Contact your local ser-

vice dealer or the factory for

replacements if any decals are

damaged or missing.

Starting Stabilization

Message (on engine)

Warning Messages

Refer to the Parts List pages in this

Manual for decal locations, descrip-

tions and part numbers.

Hot Surfaces Warning

(on belt cover)

Figure 1-2: Location of safety and operating decals (5.5HP Model shown).

Operating Symbols

Various symbols (shown here, with word

descriptions) may be used on the tiller and

engine. Your unit may not have all of the

symbols.

REVERSE

CHOKE

OFF

CHOKE

ROTATING

TINES

BAIL

DISENGAGED

ENGAGED

STOP

LEVER DIRECTION

TILLER DIRECTION

SLOW

FAST

STOP

WARNING

TO AVOID SERIOUS INJURY:

• READ THE OWNER’S MANUAL.

• KNOW LOCATIONS AND FUNCTIONS OF ALL CONTROLS.

• KEEP ALL SAFETY DEVICES AND SHIELDS IN PLACE AND WORKING.

• NEVER ALLOW CHILDREN OR UNINSTRUCTED ADULTS TO OPERATE TILLER.

• SHUT OFF ENGINE AND DISCONNECT SPARK PLUG WIRE BEFORE MANUALLY UNCLOG-

GING TINES OR MAKING REPAIRS.

• KEEP BYSTANDERS AWAY FROM MACHINE.

• KEEP AWAY FROM ROTATING PARTS.

• USE EXTREME CAUTION WHEN REVERSING OR PULLING THE MACHINE TOWARDS YOU.

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Section

Assembly

ASSEMBLY STEPS

WARNING

STEP 1: UNPACKING INSTRUCTIONS

To prevent personal injury or property

damage, do not start the engine until

all assembly steps are complete and

you have read and understand the

safety and operating instructions in this

manual.

NOTE: While unpacking, do not severely

bend any control cables.

1. The tiller weighs approximately 133 lbs.

Do not attempt to remove it from the ship-

ping platform until instructed to do so in

these Assembly steps.

2. Remove any packaging material from

the carton. Remove any staples from the

bottom of the carton and remove the

carton from the shipping platform.

INTRODUCTION

Carefully follow these assembly steps to

correctly prepare your tiller for use. It is

recommended that you read this Section

in its entirety before beginning assembly.

3. Remove all unassembled parts and the

separate hardware bag from the carton.

Check that you have the items listed in the

Loose Parts List (contact your local dealer

or the factory items are missing or dam-

aged). NOTE: Use the screw length tem-

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

Figure 2-1: To identify length of screws,

place screw on template as shown and mea-

sure distance between bottom of screw head

and tip of screw.

NOTE: Various tiller models are presented

in this Manual. Use only the information

appropriate for your tiller model.

STEP 2: ATTACH HANDLEBAR

INSPECT UNIT

1. Loosely attach the legs of the handlebar

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

the tiller frame using two 3/8"-16 x 3/4"

hex hd. screws (B), 3/8" flat washers (C),

3/8" lock washers (GG) and 3/8"-16 hex

locknuts (D).

Inspect the unit and carton for damage

immediately after delivery. Contact the

carrier (trucking company) if you find or

suspect damage. Inform them of the

damage and request instructions for filing

a claim. To protect your rights, put your

claim in writing and mail a copy to the car-

rier within 15 days after the unit has been

delivered. Contact the factory if you need

assistance in this matter.

Loose Parts List

Qty.

Description

Handlebar Support (see A, Fig. 2-2)

Handlebar Assembly (see K, Fig. 2-2)

Hardware bag contents:

Slotted hd. screw, #10-24 x 2"

Hex hd. screw, 1/4-20 x 1-1/4"

Hex hd. screw, 5/16-18 x 1-1/2"

Hex hd. screw, 3/8-16 x 3/4"

Flat washer, 3/8"

Split lockwasher, 5/16"

Hex locknut, 1/4"-20

Hex nut, 5/16"-18

Hex nut, #10-24

Hex locknut, 3/8"-16

Spring, cable (see W, Fig. 2-5)

Bracket, forward clutch cable (see

P, Fig. 2-4)

Lock Washer, 3/8

*Self-tapping screw, 1/4-20 x 1/2"

*Bracket, reverse clutch cable

2. There are three height adjustment holes

in the two handlebar support brackets (E

and F, Fig. 2-2). Use a setting that will

position the handlebars at approximately

waist level when the tines are 3"-4" into the

soil. Loosely attach the support brackets

to the handlebar support (A) using two

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

lockwashers (H) and 5/16"-18 hex nuts (I).

NOTE: If a support bracket will not move,

loosen attaching screw (J) and nut.

TOOLS/MATERIALS NEEDED

FOR ASSEMBLY

(1) 3/8” open-end wrench*

(2) 7/16" open-end wrench*

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

(2) 9/16" open-end wrench*

3. Attach the handlebar assembly (K) to

the handlebar support (A) using four

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

lockwashers (H) and 5/16"-18 hex nuts (I).

Tighten the four screws securely.

(1) Large adjustable wrench (Models

634F/634B only)

(1) Scissors (to trim plastic ties)

(1) Ruler (for belt tension check)

4. Tighten all handlebar mounting hard-

ware securely.

*Model 634F & 634B only

(1) Block of wood (to support tiller

when removing wheels)

IMPORTANT: Motor oil must be added to

the engine crankcase before the engine is

started. Follow the instructions in this

Assembly Section and in the separate

Engine Owner’s Manual.

STEP 3: MOVE TILLER OFF

SHIPPING PLATFORM

To roll the tiller off the shipping platform,

put the wheels in FREEWHEEL, as follows:

(1) Tire pressure gauge (for models with

pneumatic tires)

(1) Clean oil funnel

(1) Motor oil. Refer to the Engine Owner’s

Manual for oil specifications and

quantity required.

1. Place a sturdy block under the trans-

mission to raise one wheel about 1" off the

ground.

NOTE: LEFT and RIGHT sides of the tiller

are as viewed from the operator’s position

behind the handlebars.

* Adjustable wrenches may be used.

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Section 2: Assembly

Fig. 2-3: Wheel in FREEWHEEL position

(wheel drive pin through wheel shaft only).

STEP 4: INSTALL FORWARD

CLUTCH CABLE

1. Attach the forward clutch cable bracket

(P, Fig. 2-4) to the handlebar support (A)

with a 1/4"-20 x 1-1/4" hex hd. screw (R)

and 1/4"-20 hex locknut (S). Tighten

securely.

2. Carefully unwrap the forward clutch

cable (cable without an attached knob)

from its shipping position and slide the

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

the cable bracket. Push the cable con-

nector (U, Fig. 2-4) up through the hole in

the bracket until the groove in the con-

nector snaps into place.

Fig. 2-2: Attach handlebar (5.5HP Model shown).

3. Insert the #10-24 x 2" slotted hd. screw

(V, Fig. 2-5) down through the hooked

end of the cable spring (W) until the screw

threads extend through the spring.

2. Remove the hairpin cotter (L, Fig. 2-3)

and wheel drive pin (M) from the wheel

hub (O) and wheel shaft (N).

3. Slide the wheel fully inward on the

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

wheel drive pin (M) through the wheel

shaft only (not through the wheel hub).

Secure the wheel drive pin with the hairpin

cotter (L), pushing the hairpin cotter in as

far as it will go. The wheel should now

spin freely (freewheel) on the wheel shaft.

Repeat with the other wheel.

4. Use the handlebar to roll the tiller to a

flat area.

IMPORTANT: Before starting the engine,

the wheels must be placed in the WHEEL

DRIVE position (pins through wheel hubs

and wheel shaft). This procedure is

described in Wheel Drive Pins in Section 3.

Fig. 2-4: Installing forward clutch cable bracket and cable.

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Section 2: Assembly

4. Thread the #10-24 hex nut (Z, Fig. 2-5)

halfway onto the screw (V).

5. Thread the screw (V) into the cable

adjuster (X).

6. Hook the cable spring (W, Fig. 2-6) into

the V-shaped bend in the Forward Clutch

Bail (Y).

7. Check for correct tension on the for-

ward drive belt by taking two measure-

ments of the cable spring, as follows:

Hold bail against handlebar while

taking second measurement of

spring

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

6) in an open (released) position, mea-

sure the length of the cable spring (W)

from the outermost coil to the outer-

most coil.

Fig. 2-7: To check forward belt tension, take two measurements of the length of the coils in

b. Squeeze the Forward Clutch Bail against

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

measure the spring length. The belt

tension is correct if this second mea-

surement is between 1/16" to 3/16"

longer than the first measurement. If

so, turn the hex nut (Z, Fig. 2-7) tightly

against the cable adjuster (X) while pre-

venting the cable adjuster from turning.

the spring – first with the bail open, then with the bail held against the handlebar.

STEP 5: INSTALL REVERSE CLUTCH

CABLE (MODELS 634F AND 634B

ONLY)

1. Unwrap the reverse clutch cable (CC,

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

position and route it up to the handlebar.

Be sure that the cable is routed beneath

the Forward Clutch Bail.

c. If the spring length is incorrect, you

must adjust the cable tension as

described in Checking and Adjusting

Forward Drive Belt Tension in Section 5.

Incorrect cable tension can result in belt

slippage (cable tension too loose), or

unintentional tine movement when the

clutch bail is in Neutral (cable tension

too tight).

2. Using the two self-tapping screws (AA,

Fig. 2-8) secure the reverse cable

mounting bracket (BB)to the handlebars,

as shown.

Flat Side

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

the slot in the cable bracket and position

the flat side of the threaded assembly next

to the flat side of the hole. Slide the hex

nut (DD) up the cable and tighten it

securely.

Fig. 2-8: Install reverse cable bracket and

reverse clutch cable.

4. Fasten the reverse clutch cable to the

left side handlebar with a cable tie (EE,

Fig. 2-9).

5. Test the function of the reverse clutch

by pulling out and releasing the cable

knob. The knob should return to its neu-

tral position (resting against bracket). If it

doesn’t, contact your local dealer or the

factory for technical assistance.

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

shown. Attach with cable tie (EE).

Fig. 2-5: Cable

spring and

adjuster.

Fig. 2-6: Attach forward

clutch cable spring to

forward clutch bail.

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Section 2: Assembly

STEP 6: CHECK LEVEL OF

TRANSMISSION GEAR OIL

STEP 7: ADD MOTOR OIL

TO ENGINE

The transmission was filled with gear oil at The tiller is shipped without oil in the

the factory. However, you should check

the gear oil level at this time to make cer-

tain it is correct.

engine.

IMPORTANT: Do not start the engine

without first adding motor oil. Severe

engine damage will result if the engine is

run without oil.

1. Refer to the separate Engine Owner’s

Manual for engine oil specifications and

capacities.

2. With the tiller on level ground, move the

Depth Regulator Lever (FF, Fig. 2-10) up

or down until the engine is level.

IMPORTANT: Do not operate the tiller if

the gear oil level is low. Doing so will

result in severe damage to the transmis-

sion components.

1. With the tiller on level ground, pull the

Depth Regulator Lever (FF, Fig. 2-10) back

and then all the way up until the lowest

notch in the lever is engaged.

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

from the transmission housing cover and

locate the main drive shaft situated inside

the housing.

3. The gear oil level is correct if the gear

oil is approximately halfway up the side of

the main drive shaft.

4. If the oil level is low, add gear oil by

referring to A. To Check the Transmission

Gear Oil Level in Section 5.

3. Add motor oil as described in the

Engine Owner’s Manual.

4. Move the Depth Regulator Lever all the

way down until the highest notch is

engaged. This places the tines in the

“travel” position, which allows the tiller to

be moved without the tines touching the

ground.

STEP 8: CHECK HARDWARE

FOR TIGHTNESS

Check all nuts and screws for tightness.

STEP 9: CHECK AIR PRESSURE IN

TIRES (units with pneumatic tires)

On tires equipped with air valves, check

the air pressure with a tire gauge. Deflate

or inflate the tires equally to 15 to 20 PSI

(pounds per square inch). Be sure that

both tires are inflated equally or the unit

will pull to one side.

Fig. 2-10: Adjust Depth Regulator Lever.

IMPORTANT: This completes the assembly

steps. Before operating your tiller, make sure

you read the following sections in this Manual, as

well as the separate Engine Owner’s Manual:

• Section 1: Safety

• Section 3: Features and Controls

• Section 4: Operation

Fig. 2-11: Remove gear oil fill plug.

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Section

Features and Controls

Forward Clutch Bail

WARNING

Before operating your machine, care-

fully read and understand all safety,

controls and operating instructions in

this Manual, the separate Engine

Owner’s Manual, and on the decals on

the machine.

Reverse Clutch

Control (Models

634F/634B)

Failure to follow these instructions can

result in serious personal injury.

Depth Regulator

Handlebar Height

Adjustment

INTRODUCTION

This Section describes the location and

function of the controls on your tiller.

Refer to the following Section, Operation

for detailed operating instructions.

Wheel Drive Pin

(on each wheel)

Figure 3-1: Tiller features and controls (5.5HP Model shown). See separate Engine Owner’s

Manual to identify engine controls.

Practice using these controls, with the

engine shut off, until you understand the

operation of the controls and feel confi-

dent with each of them.

wheel hub (D) and wheel shaft (B). Secure

wheel drive pin with hairpin cotter (C) by

pushing hairpin cotter in as far as it will

go. Repeat with the other wheel and then

remove the support from beneath the

transmission.

Forward Clutch Bail (all models) or the

Reverse Clutch Control (Models 634F and

634B) is engaged.

ENGINE CONTROLS

Refer to the engine manufacturer’s Engine

Owner’s Manual (included in the tiller liter-

ature package) to identify the controls on

your engine.

Use the FREEWHEEL mode only when the

engine is not running. In FREEWHEEL, the

wheel drive pins are placed only through

the holes in the wheel shaft (not the wheel

hubs), thus allowing the wheels to turn

freely when you manually move the tiller.

IMPORTANT: The control for stopping the

engine is located on the engine.

To place the wheels in WHEEL DRIVE or

FREEWHEEL:

1. Stop engine, disconnect spark plug wire

from spark plug and allow engine to cool.

WHEEL DRIVE PINS

Each wheel is equipped with a wheel drive

pin (A, Figures 3-2 and 3-3) that secures

the wheel to the wheel shaft (B). The

wheels can be positioned in either a

WHEEL DRIVE or a FREEWHEEL mode.

WARNING

Do not place tiller on its side when

changing wheel drive positions. Doing

so could result in gasoline leaking from

the fuel tank.

WARNING

Figure 3-2: WHEEL DRIVE position.

Never allow either of the wheels to be

in the FREEWHEEL position when the

engine is running. Always put both

wheels in the WHEEL DRIVE position

before starting the engine.

Failure to follow this instruction could

result in personal injury or property

damage.

5. FOR FREEWHEEL MODE (Figure 3-3):

Slide the wheel inward and insert the

wheel drive pin (A, Figure 3-3) only

through the hole in the wheel shaft (B).

Secure wheel drive pin with hairpin cotter

will go. Repeat for the other wheel and

then remove the support from beneath the

transmission.

Failure to comply could cause loss of

tiller control, property damage, or per-

sonal injury.

2. Raise one wheel about one inch off the

ground and place a sturdy support under

the transmission.

3. Remove hairpin cotter (C, Figures 3-2

and 3-3) from wheel drive pin (A).

Before starting the engine, put both

wheels in the WHEEL DRIVE position by

inserting the wheel drive pins through the

wheel hubs and the wheel shaft. Doing so

“locks” the wheels to the wheel shaft,

causing the wheels to turn when either the

4. FOR WHEEL DRIVE MODE (Figure 3-2):

Slide wheel outward and align holes in

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

(B). Insert wheel drive pin (A) through

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Section 3: Features and Controls 11

results, always begin tilling at a very

shallow depth setting and gradually

increase the tilling depth.

WARNING

• Use extreme caution when reversing

or pulling the machine towards you.

Look behind to avoid obstacles.

WARNING

• Do not attempt to till too deeply too

quickly. Gradually work down to

deeper tilling depths.

• Never attempt to till in reverse.

Failure to follow this warning could

result in personal injury or property

damage.

• Place the Depth Regulator Lever in

the “travel” position before starting

the engine. This position prevents

the tines from touching the ground

until you are ready to begin tilling.

To operate the Reverse Clutch Control:

Figure 3-3: FREEWHEEL position.

1. Put wheels in WHEEL DRIVE position

(see “WARNING” statement at the left).

Failure to follow this warning could

result in personal injury or property

damage.

2. Stop all tiller motion by releasing the

Forward Clutch Bail.

WARNING

Before starting engine, be sure that both

wheels are in WHEEL DRIVE position.

See Wheel Drive Pins for instructions.

3. Lift the handlebar until the tines clear

the ground, look behind you to avoid any

obstacles, and then pull the control knob

(F, Figure 3-4) out. The wheels and tines

will rotate in a reverse direction.

Travel Position

Engaging the Forward Clutch Bail or

Reverse Clutch Control (if equipped)

when the wheels are not in WHEEL

DRIVE could allow the tines to rapidly

propel the tiller forward or backward.

Shallow

4. Release the control knob to disengage

(stop) the wheels and tines (the engine

will continue to run).

Settings

Deep

Settings

Failure to comply could cause loss of

tiller control, property damage, or per-

sonal injury.

Figure 3-5: Depth Regulator Lever (G).

HANDLEBAR HEIGHT ADJUSTMENT

The handlebar height is adjustable to three

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

adjust the handlebars so they are at waist

level when the tines are 3"-4" in the soil.

FORWARD CLUTCH BAIL

The Forward Clutch Bail (E, Figure 3-4)

controls the engagement of forward drive

to the wheels and tines.

To operate the Forward Clutch Bail:

To adjust the handlebars:

Figure 3-4: All models have a Forward

Clutch Bail (E). Only Models 634F/634B

have a Reverse Clutch Control (F).

1. Put wheels in WHEEL DRIVE position

(see “WARNING” statement above).

1. Stop engine, disconnect spark plug

wire from spark plug and allow engine to

cool.

2. Lift and hold the clutch bail (E, Figure

3-4) against the handlebar to start the

wheels and tines rotating in a forward

direction.

2. Remove hardware, reposition handle-

bars, and reinstall hardware securely.

DEPTH REGULATOR LEVER

This lever (G, Figure 3-5) controls the

tilling depth of the tines. Pull the lever

back and slide it up or down to engage the

notched height settings.

3. Release the clutch bail to disengage

(stop) the wheels and tines (the engine

will continue to run).

The “travel position” (highest notch) raises

the tines approximately 1-1/2" off the

ground, allowing the tiller to be moved

without the tines contacting the ground.

This setting should also be used when

starting the engine.

High

REVERSE CLUTCH CONTROL

(Models 634F/634B only)

Medium

Low

The Reverse Clutch Control (F, Figure 3-4)

controls the engagement of reverse drive

to the wheels and tines. The reversing

feature is used for maneuvering the tiller

only – never engage the tines in the

ground while operating in reverse.

Moving the lever upward will increase the

tilling depth. The lowest notch allows a

tilling depth of approximately 6",

depending on soil conditions. For best

Figure 3-6: Handlebar height adjustment.

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Section

Operation

Reverse Clutch Control

(Models 634F/634B)

1. Complete the Pre-Start Checklist on

this page.

WARNING

Before operating your machine, care-

fully 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.

2. Put the wheels in the WHEEL DRIVE

position (see Wheel Drive Pins in Section

3 of this manual).

CAUTION

To help prevent serious personal injury

or damage to equipment:

Forward Clutch Bail

Failure to follow these instructions can

result in serious personal injury.

Depth

Regulator

• Before starting engine, put both

wheels in the WHEEL DRIVE position.

Never have wheels in FREEWHEEL

position when engine is running.

When the wheels are in FREEWHEEL,

they do not hold back the tiller and the

tines could propel the tiller rapidly

forward or backward.

Recoil Starter

INTRODUCTION

Read this Operation Section and the sepa-

rate Engine Owner’s Manual before you

start the engine. Then, take the time to

familiarize yourself with the basic opera-

tion of the tiller before using it in the

garden. Find an open, level area and prac-

tice using the tiller controls without the

tines engaging the soil (put tines in

Wheel Drive Pin

(on each wheel)

• Before starting engine, put Forward

Clutch Bail (all models) and Reverse

Clutch Control (Models 634F/634B

only) in neutral (disengaged) positions

by releasing levers.

Fig. 4-1

“travel” setting). Only after you’ve

become completely familiar with the tiller

should you begin using it in the garden.

5. Check that all safety guards and covers

are in place.

6. Check air cleaner and engine cooling

system. See Engine Owner’s Manual.

• Never run engine indoors or in

enclosed, poorly ventilated areas.

Engine exhaust contains carbon

monoxide, an odorless and deadly gas.

BREAK-IN OPERATION

• Avoid engine muffler and nearby

Perform the following maintenance after

the first two (2) hours of new operation

(see Maintenance Section in this manual

and in the Engine Owner’s Manual).

1. Change engine oil.

2. Check for loose or missing hardware

on unit. Tighten or replace as needed.

3. Check tension on forward drive belt.

4. Check transmission gear oil level.

DANGER

GASOLINE IS HIGHLY FLAMMABLE AND

ITS VAPORS ARE EXPLOSIVE.

areas. Temperatures in these areas

may exceed 150 F.

Follow gasoline safety rules in this

Manual (see Section 1) and in the sepa-

rate Engine Owner’s Manual.

3. Move the Depth Regulator Lever all the

way down to the “travel” position, so that

the tines clear the ground.

Failure to follow gasoline safety instruc-

tions can result in serious personal

injury and property damage.

4. Release all controls on the tiller.

5. On engine’s with a fuel shut-off valve,

turn valve to open position, as instructed

in the separate Engine Owner’s Manual.

STARTING AND STOPPING

THE ENGINE

7. Fill the fuel tank with gasoline

6. Put ignition switch and/or throttle con-

trol lever located on engine in the “ON”,

“RUN”, “FAST” or “START” position, as

instructed in the Engine Owner’s Manual.

according to the directions in the separate

Engine Owner’s Manual. Follow all

instructions and safety rules carefully.

Pre-Start Checklist

With the spark plug wire disconnected

from the spark plug, perform the following

checks and services before each use:

1. Read the Safety and Controls Sections

in this manual. Read the separate Engine

Owner’s Manual provided with the unit.

2. Put the wheels in the WHEEL DRIVE

position (wheel pins must be through

holes in wheel hubs and wheel shaft).

3. Check unit for loose or missing hard-

ware. Service as required.

4. Check engine oil level. See Engine

Owner’s Manual.

8. Attach spark plug wire to spark plug.

7. Choke or prime engine, as instructed in

Engine Owner’s Manual.

Starting the Engine

The following steps describe how to start

and stop the engine. Do not attempt to

engage the tines or wheels until you

have read all of the operating instruc-

tions in this Section. Also, review the

safety rules in Section 1: Safety, and the

tiller and engine controls information in

Section 3: Features and Controls.

8. Put one hand on fuel tank to stabilize

unit when pulling starter rope handle.

Then use recoil starter to start engine, as

instructed in the Engine Owner’s Manual.

When engine starts, gradually move choke

lever (if so equipped) to “NO CHOKE”,

“CHOKE OFF” or “RUN” position.

9. Use the “FAST” throttle speed setting

when tilling.

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Section 4: Operation 13

4. For forward motion of the wheels and

tines:

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

against handlebar. Release bail to stop

forward motion of wheels and tines.

(b) Swing the handlebar to the left so the

right wheel takes a “step” backward.

Next swing the handlebar to the right

so the left wheel “steps” backward.

Repeat as needed.

WARNING

in reverse, shut off the engine, then

place the two wheels in FREEWHEEL.

(b) When tilling, relax and let the wheels

pull the unit while the tines dig. Walk

behind and a little to one side of the

unit. Use one hand, yet keep a light—

but secure—grip on the handlebar

(while keeping your arm loose). See

Fig. 4-2. Let the unit move at its own

pace and do not push down on the

handlebars to try and force the tines to

dig deeper — this takes weight off the

wheels, reduces traction, and causes

the tines to try and propel the tiller.

Keep away from rotating tines. Rotating

tines will cause injury.

7. To Turn the Tiller Around:

Stopping the Engine and Tiller

(a) Practice turning the tiller in a level,

open area. Be very careful to keep

your feet and legs away from the tines.

(b) To begin a turn, lift the handlebars until

the tines are out of the ground and the

engine and tines are balanced over the

wheels (Fig. 4-4).

handlebar to steer in direction of turn

(Fig. 4-5). After turning, slowly lower

tines into soil to resume tilling.

1. To stop the wheels and tines, release

the Forward Clutch Bail (all models) or the

Reverse Clutch Control (Models 634F and

634B) – whichever control is in use.

2. To stop the engine, put the ignition

switch and/or the throttle control lever in

the “OFF” or “STOP” position.

OPERATING THE TILLER

WARNING

The following operating instructions pro-

vide guidelines to using your tiller effec-

tively and safely. Be sure to read Tilling

Tips & Techniques in this Section before

actually putting the tines into the soil.

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 forward,

which could result in loss of control,

property damage, or personal injury.

NOTE: This is a traditional “Standard-

Rotating-Tine” (SRT) tiller with forward

rotating tines. It operates completely dif-

ferently from “Counter-Rotating-Tine”

(CRT) tillers or from front-tine tillers.

5. For reverse motion of the wheels and

tines (Models 634F/634B only):

1. Follow the Pre-Start Checklist at the

beginning of this Section. Be sure that the

wheels are in the WHEEL DRIVE position.

(a) Look behind and exercise caution when

operating in reverse. Do not till while

in reverse.

Fig. 4-4: To begin turn, lift handlebars until

tines are out of ground and unit is balanced.

2. Move the Depth Regulator Lever all the

way down, so that the tines clear the

ground. Use this position when practicing

with the tiller and when traveling between

tilling sites. Before actually tilling, move

the lever to the desired depth setting (see

Tilling Tips & Techniques).

(b) Stop all forward motion. Lift handlebar

with one hand until tines are off the

ground and then pull Reverse Clutch

Control knob out (see Fig. 4-3). To

stop reversing, let go of Reverse Clutch

Control knob.

3. Start engine and allow it to warm up.

Then put throttle in “FAST” setting.

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

handlebars sideways to turn tiller.

Stopping the Tiller and Engine

Fig. 4-3: Raise tines off ground and look

behind when moving in reverse.

1. To stop the wheels and tines, release

the Forward Clutch Bail (all models) or the

Reverse Clutch Control (Models 634F and

634B) – whichever control is in use.

2. To stop the engine, put the ignition

switch and/or the throttle control lever in

the “OFF” or “STOP” position.

Fig. 4-2: Use one hand to guide tiller when

moving forward.

6. To move the Model 630B in reverse for

short distances:

(a) Release Forward Clutch Bail. Then lift

handlebar until tines are off the ground.

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Section 4: Operation

TILLING TIPS & TECHNIQUES

Tilling Depths

• Avoid pushing down on the handlebars in an attempt to force the tiller to dig deeper. Doing

so takes the weight off the powered wheels, causing them to lose traction. Without the

wheels helping to hold the tiller back, the tines will attempt to propel the tiller – often

causing the tiller to skip rapidly across the ground. (Sometimes, slight downward pressure

on the handlebars will help get through a particularly tough section of sod or unbroken

ground, but in most cases this won’t be necessary.)

WARNING

Before tilling, contact your tele-

phone or utilities company and

inquire if underground equipment

or lines are used on your property.

Do not till near buried electric

cables, telephone lines, pipes or

hoses.

• Avoid trying to dig too deeply too quickly, especially when busting sod or when tilling soil

that hasn’t been tilled for some time. Use shallow depth regulator settings (only an inch or

two deep) for the first passes through the soil. With each succeeding pass, dig another inch

or two deeper. (Watering the area a few days prior to tilling will make tilling easier, as will

letting the newly worked soil set for a day or two before making a final, deep tilling pass.)

• When cultivating (breaking up surface soil around plants to destroy weeds, see Fig. 4-9), adjust the tines to dig only 1" to 2" deep.

Using shallow tilling depths helps prevent injury to plants whose roots often grow close to the surface. If needed, lift up on the handle-

bars slightly to prevent the tines from digging too deeply. (Cultivating on a regular basis not only eliminates weeds, it also loosens and

aerates the soil for better moisture absorption and faster plant growth.)

Choosing Correct

Wheel and Tine Speeds

With experience, you will find the “just right” tilling depth and tilling speed combination that is best

for your garden.

Set the engine throttle lever at a speed to give the engine adequate power and yet allow it to operate at the slowest possible speed...at

least until you have achieved the maximum tilling depth you desire. Faster engine speeds may be desirable when making final passes

through the seedbed or when cultivating. Selection of the correct engine speed, in relation to the tilling depth, will ensure a sufficient

power level to do the job without causing the engine to labor.

Let the Tiller Do the Work

Avoid Making Footprints

Avoid Tilling Soggy, Wet Soil

While tilling, relax and let the wheels pull

the tiller along while the tines do the dig-

ging. Walk on the side that is not yet fin-

ished (to avoid making footprints in the

freshly tilled soil) and lightly, but securely

grip the handlebar with just one hand.

Tilling wet soil often results in large, hard

clumps of soil that can interfere with

planting. If time permits, wait a day or two

after heavy rains to allow the soil to dry

before tilling. Test soil by squeezing it into

a ball. If it compresses too easily, it is too

wet to till.

Whenever possible, walk on the untilled

side of the unit to avoid making footprints

in your freshly tilled or cultivated soil.

Footprints cause soil compaction that can

hamper root penetration and contribute to

soil erosion. They can also “plant”

unwanted weed seeds back into the

freshly tilled ground.

Preparing Seedbeds

• When preparing a seedbed, go over the same path twice in the first row, then

overlap one-half the tiller width on the rest of the passes (see Fig.

4-6). When finished in one direction, make a second pass at a right angle, as

shown in Fig. 4-7. Overlap each pass for best results (in very hard ground, it

may take three or four passes to thoroughly pulverize the soil.)

Fig. 4-6

Fig. 4-7

Cultivating

• If the garden size will not permit

lengthwise and then crosswise

tilling, then overlap the first passes

by one-half a tiller width, followed

by successive passes at one-

quarter width (see Fig. 4-8).

With planning, you can

allow enough room

between rows to cultivate

(see Fig. 4-9). Leave room

for the hood width, plus

enough extra room for

Fig. 4-8

future plant growth.

Fig. 4-9

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Section 4: Operation 15

TILLING TIPS & TECHNIQUES (cont.)

Power Composting

Power composting simply means tilling under and burying in the soil all manner of

organic matter such as crop residues, leaves, grass clippings and cover crops. This

material will decompose during the non-growing season and add important natural nutri-

ents to the soil.

WARNING

When power composting, do not keep

the Depth Regulator Lever at a deep

setting if the tiller jumps or bucks.

The first place to begin is with crop residues such as leftover vines, stalks, stems and

roots. Power compost these crop residues as soon as they finish bearing. The sooner

this is done, the better, as tender green matter is easier to till under. Use the deepest

depth regulator setting possible without causing the engine to labor or the tiller to jump

ahead.

If jumping or bucking occurs, move the

Depth Regulator Lever down to a

shallow setting and then slowly

increase the tilling depth on later

passes.

Standing cornstalks of reasonable height can be power composted. Pushing over (but

not uprooting) cornstalks will often make it easier to chop up the stalks. Keep the tines

clear of excessive tangling by “fishtailing” or frequently using reverse. Make several

passes, then return a few days later to finish off any remaining stubble.

Failure to follow this warning could

result in personal injury.

After tilling under crop residues, add more organic matter such as leaves, grass clippings and even kitchen scraps. When tilled into the

soil, this organic matter will decompose and add even more important nutrients to the soil.

After power composting, you may want to plant a “green manure” cover crop to protect the soil during the off-season. You simply

grow a crop of clover, alfalfa, buckwheat, peas, beans, rye grass, grain, or kale and then till it into the soil prior to the planting season.

Tilling On Slopes

Read the following recommendations before tilling on slopes:

WARNING

Do not operate tiller on a slope too

steep for safe operation. Till slowly

and be sure you have good footing.

If you must garden on a moderate slope, please follow two very important

guidelines:

1. Till only on moderate slopes, never on steep ground where footing is difficult

(review safety rules in Section 1: Safety of this manual).

Never permit tiller to freewheel down

slopes. Failure to follow this warning

could result in personal injury.

2. We recommend tilling up and down slopes rather than terracing. Tilling vertically

on a slope allows maximum planting area and also leaves room for cultivating.

IMPORTANT: When tilling on slopes, be sure the correct oil level is maintained in

the engine (check every one-half hour of operation). The incline of the slope will

cause the oil to slant away from its normal level and this can starve engine parts of

required lubrication. Keep the motor oil level at the full point at all times!

Tilling Across Slopes Without Using

Terraces (Horizontal Tilling)

• If vertical or terracing gardening aren’t

practical for you, then you can till laterally

across a slope. We don’t recommend this

method as it can create unsure footing and

invites soil erosion.

Tilling Up and Down Slopes (Vertical Tilling)

• To keep soil erosion to 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.

• As in terrace gardening, start at the top of

the slope and overlap the first pass by half

the width of the tiller. For added stability of

the tiller, always keep the uphill wheel in the

soft, newly tilled soil.

• When tilling vertically, try to make the first pass uphill as the tiller digs more

deeply going uphill than it does downhill. In soft soil or weeds, you may have to

lift the handlebars slightly while going uphill. When going downhill, overlap the

first pass by about one-half the width of the tiller.

Terrace Gardening

• When a slope is too steep or too short for vertical tilling, it may be necessary to till across the slope and create terraced rows. Ter-

races are rows that are cut into the side of a slope, creating a narrow, but flat area on which to plant.

• On a long slope, you can make several terraces, one below the other.

• Terraces should be only 2-to-3 feet wide. Digging too far into the side of the slope will expose poor subsoil that is unproductive for

plants.

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Section 4: Operation

TILLING TIPS & TECHNIQUES (cont.)

Terrace Gardening (continued)

UPHILL

• To create a terrace, start at the top of the slope and work down. Go back and forth

across the first row as shown in Fig. 4-10.

• Each succeeding lower terrace is started by walking below the terrace you’re

preparing. For added stability of the tiller, always keep the uphill wheel in the soft,

newly tilled soil. Do not till the last 12" or more of the downhill outside edge of each

terrace. This untilled strip helps prevents the terraces from breaking apart and

washing downhill. It also provides a walking path between rows.

12" UNTILLED

REPEAT

DOWNHILL

Fig. 4-10

Clearing the Tines

• It may be necessary to remove the debris by

hand (a pocket knife will help you to cut away

the material). Be sure to stop the engine and

disconnect the spark plug wire before clearing

the tines by hand.

The tines have a self-clearing action which eliminates most tangling of debris in

the tines. However, occasionally dry grass, stringy stalks or tough vines may

become tangled. Follow these procedures to help avoid tangling and to clean

the tines, if necessary.

• To reduce tangling, set the depth regulator deep enough to get maximum

“chopping” action as the tines chop the material against the ground. Also, try

to till under crop residues or cover crops while they are green, moist and

tender.

WARNING

Before clearing the tines by hand, stop the

engine, allow all moving parts to stop and

disconnect the spark plug wire. Remove the

ignition key on electric start models.

• While power composting, try swaying the handlebars from side to side (about

6" 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 reverse (if

unit is equipped with powered reverse) for a few feet. This reversing action

should unwind a good deal of debris.

Failure to follow this warning could result in

personal injury.

• Use sturdy ramps and manually (engine

tiller ahead of you. Have a person at

each side to turn the wheels.

LOADING AND UNLOADING

THE TILLER

shut off) roll the tiller into and out of the

vehicle. Two or more people are needed

to do this.

• When going down ramps, walk backward

with the tiller following you. Keep alert

for any obstacles behind you. Position a

person at each wheel to control the

speed of the tiller. Never go down ramps

tiller-first, as the tiller could tip forward.

WARNING

• The ramps must be strong enough to

support the combined weight of the tiller

and any handlers. The ramps should pro-

vide good traction to prevent slipping;

they should have side rails to guide the

tiller along the ramps; and they should

have a locking device to secure them to

the vehicle.

Loading and unloading the tiller into a

vehicle is potentially hazardous and we

don’t recommend doing so unless abso-

lutely necessary, as this could result in

personal injury or property damage.

• Place wooden blocks on the downhill

side of the wheels if you need to stop the

tiller from rolling down the ramp. Also,

use the blocks to temporarily keep the

tiller in place on the ramps (if neces-

sary), and to chock the wheels in place

after the tiller is in the vehicle.

However, if you must load or unload the

tiller, follow the guidelines given next.

• The handlers should wear sturdy footwear

that will help to prevent slipping.

• 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.

• Position the loading vehicle so that the

ramp angle is as flat as possible (the less • After loading the tiller, prevent it from

incline to the ramp, the better). Turn the

vehicle’s engine off and apply its parking

brake.

rolling by engaging the wheels in the

WHEEL DRIVE position. Chock the

wheels with blocks and securely tie the

tiller down.

• The tiller is too heavy and bulky to lift

safely by one person. Two or more

people should share the load.

• When going up ramps, stand in the

normal operating position and push the

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Section

Maintenance

If a cover is leaking, check for loose

screws. If the screws are tight, a new

gasket or oil seal may be required.

TILLER LUBRICATION

After every 10 operating hours, oil or

grease the lubrication points shown in

Figure 5-1 and described below.

WARNING

Before inspecting, cleaning or

servicing the machine, shut off engine,

wait for all moving parts to come to a

complete stop, disconnect spark plug

wire and move wire away from spark

plug. Remove ignition key on electric

start models.

If the leak is from around a shaft and oil

seal, the oil seal probably needs to be

replaced. See your authorized dealer or

contact the factory for service or advice.

Use clean lubricating oil (#30 weight

motor oil is suitable) and clean general

purpose grease (grease containing a metal

lubricant is preferred, if available).

IMPORTANT: Never operate the tiller if the

transmission is low on oil. Check the oil

level after every 30 hours of operation and

whenever there is any oil leakage.

• Remove the wheels, clean the wheel

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

coating of grease to the wheel shaft.

Failure to follow these instructions can

result in serious personal injury or prop-

erty damage.

• Grease the back, front and sides of the

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

CHECK HARDWARE

Check for loose or missing hardware after

every 10 operating hours and tighten or

replace (as needed) before reusing tiller

• Remove the tines and clean the tine shaft

(C, Fig. 5-1). Use a file or sandpaper to

gently remove any rust, burrs or rough

spots (especially around holes in shaft).

Apply grease to ends of shaft before

installing tines.

Be sure to check the screws underneath

the tiller hood that secure the transmission

cover and the Depth Regulator Lever to the

transmission.

MAINTENANCE SCHEDULE

PROCEDURE

NOTES

2, 3

2, 7

1, 4

4, 6, 9

• Oil the threads on the handlebar height

adjustment screws and the handlebar

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

Check motor oil level

Clean engine

CHECK TIRE PRESSURE

(Models with pneumatic tires)

Check drive belt tension

Check nuts and bolts

Change motor oil

Check the air pressure in both tires. The

air pressure should be between 15-20 PSI

(pounds per square inch).

Lubricate tiller

Service engine air cleaner system

Check gear oil level in transmission

Check tines for wear

Keep both tires equally inflated to help

prevent machine from pulling to one side.

1, 5

Check air pressure in tires (if unit

has pneumatic tires)

TRANSMISSION GEAR

OIL SERVICE

Service spark plug

NOTES

Check the transmission gear oil level after

every 30 hours of operation or whenever

you notice any oil leak. Operating the tiller

when the transmission is low on oil can

result in severe damage.

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

2 - Before each use.

3 - Every 5 operating hours.

4 - Every 10 operating hours.

5 - Every 30 operating hours.

6 - Change more frequently in dusty or dirty

conditions.

A. To Check the Transmission

Gear Oil Level:

7 - See Engine Owner’s Manual for service

Figure 5-1

recommendations.

1. Check the gear oil level when the trans-

mission is cool. Gear oil will expand in

warm operating temperatures and this

expansion will provide an incorrect oil

level reading.

8 - Whichever time interval occurs first.

9 - Change after first 2 hours of break-in

operation.

CHECK FOR OIL LEAKS

Before each use, check the tiller for signs

of an oil leak – usually a dirty, oily accu-

mulation either on the unit or on the floor.

2. With the tiller on level ground, pull the

Depth Regulator Lever all the way up.

A little seepage around a cover or an oil

seal is usually not a cause for alarm. How-

ever, if the oil drips overnight, then imme-

diate attention is needed. Ignoring an oil

leak can result in severe transmission

damage!

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

from the transmission housing and look

inside the oil fill hole to locate the main

drive shaft situated below the hole.

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Section 5: Maintenance

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to

come to a complete stop, disconnect spark plug wire and move wire away from spark plug.

Failure to follow these instructions can result in serious personal injury or property damage.

4. The gear oil level is correct if the gear

oil is approximately halfway up the side of

the main drive shaft.

B. To Drain the Transmission Gear Oil:

BOLO TINES

The transmission gear oil does not need to

be changed unless it has been contami-

nated with dirt, sand or metal particles.

1. Drain gasoline from the fuel tank or run

the engine until the fuel tank is empty. See

“DANGER” statement below.

The bolo tines will wear with use and

should be inspected at the beginning of

each tilling season and after every 30

operating hours. The tines can be

replaced either individually or as a com-

plete set. See the Parts List pages for tine

identification and part numbers.

5. If the gear oil level is low, add gear oil

as described next. If the gear oil level is

okay, securely replace the oil fill plug.

IMPORTANT: Do not operate the tiller if

the gear oil level is low. Doing so will

result in severe damage to the transmis-

sion components.

DANGER

A. Tine Inspection:

Gasoline is highly flammable and its

vapors are explosive. Follow these

safety practices to prevent personal

injury or property damage from fire or

explosion.

With use, the tines will become shorter,

narrower and pointed. Badly worn tines

will result in a loss of tilling depth, and

reduced effectiveness when chopping up

and turning under organic matter.

• Allow the engine and muffler to cool

for at least two minutes before

draining the tiller’s gasoline tank.

B. Removing/Installing a Single Tine:

1. With the engine shut off and the spark

plug wire disconnected, remove the two

screws (A, Figure 5-3), lockwahers (E) and

nuts (B) that attach a single tine to a tine

holder. If needed, use penetrating oil on

• 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 the nuts.

and store it safely out of the reach of

2. When installing a single tine, be sure to

children.

position it so that its cutting edge (sharp)

will enter the soil first as the tiller moves

forward.

Figure 5-2: Remove oil fill plug (A) to check

gear oil level and to add gear oil. Remove

four cover screws (B) to drain gear oil.

• Do not store gasoline in an area 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.)

C. Removing/Installing a Tine Assembly:

1. A tine assembly consists of eight tines

mounted on a tine holder.

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

use API rated GL-4 or GL-5 gear oil having

a viscosity of SAE 140, SAE 85W-140 or

SAE 80W-90. If refilling an empty trans-

mission, use only GL-4 gear oil having a

viscosity of SAE 85W-140 or SAE 140.

2. If removing both tine assemblies, mark

them “left” and “right” before removal.

Remove the screw (C, Figure 5-3), lock

washer (E) and locknut (D) that secure the

tine assembly to the tine shaft. If neces-

sary, use a rubber mallet to tap the tine

assembly outward off the shaft.

2. Drain the oil from the engine.

3. Remove four screws (B, Figure 5-2) and

remove transmission cover and gasket.

4. Remove the left-side wheel.

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

pan and allow the gear oil to drain through

the top of the transmission.

IMPORTANT: Do not use automatic trans-

mission fluid or motor oil in the transmis-

sion.

3. Before reinstalling the tine assembly,

inspect the tine shaft for rust, rough spots

or burrs. Lightly file or sand, as needed.

Apply a thin coat of grease to the shaft.

7. While checking frequently to avoid

overfilling, slowly add gear oil into the oil

fill hole until it reaches the halfway point

on the drive shaft.

6. Reinstall the wheel.

7. Install a new gasket (do not reuse old

gasket) and reinstall the transmission

cover.

8. Refill the transmission using GL-4 gear

oil (SAE 85W-140 or SAE 140).

4. Install each tine assembly so that the

cutting (sharp) edge of the tines will enter

the soil first when the tiller moves

forward. Secure the tine assembly to the

tine shaft using the screw and locknut

previously removed.

8. Securely replace the oil fill plug.

9. Refill the engine with motor oil and

replenish the fuel tank with gasoline.

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Section 5: Maintenance

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to

come to a complete stop, disconnect spark plug wire and move wire away from spark plug.

Failure to follow these instructions can result in serious personal injury or property damage.

c. Unhook the top of the spring from

the Forward Clutch Bail.

d. Use pliers to prevent the adjuster (B)

from turning and turn the slotted

screw located inside the spring

clockwise (viewed from operator’s

ENGINE

position) to increase tension on the

spring. Turn the screw counter-

clockwise to decrease tension. Once

adjusted, reattach the spring to the

Forward Clutch Bail.

e. Repeat Steps 2 and 3 to re-measure

the length of the spring. When the

second measurement is between

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

measurement, retighten the hex nut

Replacement Belt Information

If the drive belt needs to be replaced, see

your local authorized dealer or refer to the

Parts List for ordering information. Use

only a factory-authorized belt as an “over-

the-counter” belt may not perform satis-

factorily. The procedure requires average

mechanical ability and commonly available

tools.

Figure 5-3: Install tines so that cutting edge of tines enter soil first when tiller moves forward.

measurement is between 1/16" -to- 3/16"

longer than the first measurement.

CHECKING AND ADJUSTING

FORWARD DRIVE BELT TENSION

It is important to maintain correct tension

on the forward drive belt. A loose belt will

cause the tines and wheels to slow down –

or stop completely – even though the

engine is running at full speed. A too tight

belt can result in unintentional tine move-

ment when the clutch bail is in the Neutral

(released) position.

4. If the spring is too short (less than

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

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

tension is too tight.

5. To adjust the length of the spring:

a. Release the Forward Clutch Bail.

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

about halfway up the adjustment

screw (D).

• Check belt tension after the first two

hours of break-in operation and after

every 10 operating hours.

• At the end of each tilling season, check

the belt for cracks, cuts or frayed edges

and replace it as soon as possible.

To Check Forward Belt Tension:

1. Stop engine, wait for all parts to stop

moving and disconnect spark plug wire.

2. With the Forward Clutch Bail in an

open (released) position, measure and

note the overall length of the cable spring

(A, Figure 5-4) by measuring from the out-

ermost coil to the outermost coil.

Hold bail against handlebar while

taking second measurement of

spring

3. Squeeze the Forward Clutch Bail

against the handlebar (see Figure 5-4) and

re-measure the length of the coils. The

belt tension is correct if this second

Figure 5-4: To check forward belt tension, take two measurements of

the overall length of the coils in the spring – first with the clutch bail

open, then with the clutch bail closed against the handlebar.

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Section 5: Maintenance

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to

come to a complete stop, disconnect spark plug wire and move wire away from spark plug.

Failure to follow these instructions can result in serious personal injury or property damage.

5. Release the Reverse Clutch Control

knob.and then unthread the inner jam nut

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

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

the left until the inner jam nut (C) touches

the bracket.

Replacement Belt Information

FORWARD CLUTCH

BAIL ADJUSTMENT

If the drive belt needs to be replaced, see

your local authorized dealer or refer to the

Parts List for ordering information. Use

only a factory-authorized belt as an “over-

the-counter” belt may not perform satis-

factorily. The procedure requires average

mechanical ability and commonly available

tools.

If the Forward Clutch Bail does not func-

tion properly, first check that the forward

drive belt is adjusted properly (see

Checking and Adjusting Forward Drive

Belt Tension). If this fails to correct the

problem, contact the factory Technical

Service Department or your authorized

dealer for service advice.

6. Prevent the inner jam nut (C) from

turning and tighten the outer jam nut (D)

against the bracket. Prevent the outer jam

nut (D) from turning and tighten the inner

jam nut (C) against the bracket.

ENGINE CLEANING

7. Measure the gap by repeating Step 3.

Readjust as needed by repeating Steps 5

and 6.

Keeping the engine clean will help to

ensure smooth operation and prevent

damage from overheating. Refer to the

Engine Owner’s Manual for engine

cleaning service intervals and instructions.

Be sure that the muffler is cool before ser-

vicing the engine.

CHECKING AND ADJUSTING

REVERSE DRIVE BELT TENSION

(Models 634F/634B only)

It is important to maintain correct tension

on the reverse drive belt. A loose belt will

cause the tines and wheels to slow down –

or stop completely – even though the

engine is running at full speed.

8. Reinstall the belt cover.

AIR CLEANER SERVICE

When checking belt tension, also check

the belt for cracks, cuts or frayed edges

and replace it as soon as possible.

The air cleaner filters dirt and dust out of

the air before it enters the carburetor.

Operating the engine with a dirty, clogged

air filter can cause poor performance and

damage to the engine. Never operate the

engine without the air cleaner installed.

Inspect and service the air cleaner more

often if operating in very dusty or dirty

conditions. Refer to the Engine Owner’s

Manual for air cleaner service intervals

and instructions.

• Check belt tension after the first two

hours of break-in operation and after

every 10 operating hours.

A B

To Check Reverse Belt Tension:

1. Stop engine, wait for all parts to stop

moving and disconnect spark plug wire.

Figure 5-5: Measure cable wire length to

check for correct reverse belt tension.

2. Remove screw in plastic belt cover and

slide belt cover (which is attached to for-

ward clutch cable) out of the way.

ENGINE OIL SERVICE

Check the engine oil level before each use

and after every 5 hours of continuous

operation. Running the engine when it is

low on oil will quickly ruin the engine.

3. Have an assistant pull the Reverse

Clutch Control knob all the way out and

hold it in that position. Measure the

length of the cable wire between the end

of the threaded cable adjuster (A, Figure 5-

5) and the end of the z-fitting (B) to which

the cable wire is attached.

It is recommended that you change the

motor oil after every 10 hours of operation

and even sooner when operating in

extremely dirty or dusty conditions. Refer

to the Engine Owner’s Manual for detailed

service instructions.

4. The belt tension is ideal if the cable wire

length measures between 1/8" to 1/4". If it

is less than 1/8" (and if there is no reverse

action when the tiller is running), then

make the following adjustments.

NOTE: If the length is more than 1/4", no

adjustment is needed—as long as the

reverse action functions properly.

A. To Check the Engine Oil Level:

1. Park the tiller on a level area and shut

off the engine.

Figure 5-6: Move threaded

adjuster (A) to left to increase

belt tension.

2. Level the engine (use the Depth Regu-

lator Lever to adjust the engine angle).

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Section 5: Maintenance

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to

come to a complete stop, disconnect spark plug wire and move wire away from spark plug.

Failure to follow these instructions can result in serious personal injury or property damage.

3. Clean around the oil dipstick or oil fill

tube (whichever applies) to prevent dirt

from falling into the crankcase.

THROTTLE LEVER ADJUSTMENT OFF SEASON STORAGE

If the engine does not respond to various

throttle lever settings, refer to the Engine

When the tiller won’t be used for an

extended period, prepare it for storage as

4. On engines with an oil fill tube, remove

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

reaches the top of the fill tube. Reinstall

the fill cap.

Owner’s Manual for service information or follows:

contact your local authorized engine

dealer.

1. Clean the tiller and engine.

2. Do routine tiller lubrication and check

for loose parts and hardware.

5. On engines with a dipstick, remove it

and wipe it clean. Reinsert the dipstick,

tighten it securely, and remove it. Add oil

as needed to bring the level up to the FULL

mark. Wipe dipstick clean each time oil

level is checked. Do not overfill. Tighten

dipstick securely.

WARNING

3. Protect the engine and perform recom-

mended engine maintenance by following

the storage instructions found in the

Engine Owner’s Manual. Be sure to pro-

tect the fuel lines, carburetor and fuel tank

from gum deposits by removing fuel or by

treating fuel with a fuel stabilizer (follow

engine manufacturer’s recommendations).

Operators shall not tamper with the

engine governor settings on the

machine; the governor controls the max-

imum safe operating speed to protect

the engine and all moving parts from

damage caused by overspeed. Autho-

rized service shall be sought if a

problem exists.

B. To Change the Engine Oil:

Change the engine oil as instructed in the

Engine Owner’s Manual.

4. Store unit in a clean, dry area.

5. Never store the tiller with fuel in the

fuel tank in an enclosed area where gas

fumes could reach an open flame or spark,

or where ignition sources are present

(space heaters, hot water heaters, fur-

naces, etc.).

SPARK PLUG SERVICE

CARBURETOR/GOVERNOR

CONTROL ADJUSTMENTS

The carburetor was adjusted at the factory

for best operating speed. Refer to the

Engine Owner’s Manual for any adjust-

ment information or see your authorized

engine dealer.

Inspect and clean or replace the spark

plug after every 100 operating hours or

annually. Refer to the Engine Owner’s

Manual for spark plug service instructions.

In some areas, local law requires using

resistor spark plugs to suppress ignition

signals. If the engine was originally

equipped with a resistor spark plug, use

the same type for replacement.

The governor controls the maximum safe

operating speed and protects the engine

and all moving parts from damage caused

by overspeeding. Do not tamper with the

engine governor settings.

SPARK ARRESTER SCREEN

SERVICE

If the engine muffler is equipped with a

spark arrester screen, remove and clean it

according to the service intervals and

instructions in the Engine Owner’s

Manual.

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Section 5: Maintenance

WARNING

Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to

come to a complete stop, disconnect spark plug wire and move wire away from spark plug.

Failure to follow these instructions can result in serious personal injury or property damage.

TROUBLESHOOTING

Before performing any troubleshooting procedures, refer to the appropriate safety, operating or maintenance instructions in this

Manual or in the Engine Owner’s Manual. Contact your authorized engine service dealer for engine service. Contact your autho-

rized tiller dealer or the factory for all other service problems.

PROBLEM

POSSIBLE CAUSE

CORRECTION

Engine does

not start.

1. Spark plug wire disconnected.

2. Engine Throttle Control Lever incorrectly set.

3. Fuel tank empty.

1. Reconnect wire.

2. Put lever in START position.

3. Add fuel.

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

5. Stale gasoline.

6. Dirty air filter(s).

7. Defective or incorrectly gapped spark plug.

8. Carburetor out of adjustment.

9. Misadjusted throttle control.

10.Dirt or water in fuel tank.

4. See Engine Owner’s Manual.

5. Drain fuel and add fresh fuel.

6. Clean or replace filter(s).

7. Inspect spark plug.

8. See Engine Service Dealer.

9. See Engine Service Dealer

10. See Engine Service Dealer.

Engine runs poorly.

Engine overheats.

1. Defective or incorrectly gapped spark plug.

2. Dirty air filter(s).

3. Carburetor out of adjustment.

4. Stale gasoline.

5. Dirt or water in fuel tank.

6. Engine cooling system clogged.

1. Inspect spark plug (see Engine Owner’s Manual).

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

3. See Engine Service Dealer.

4. Replace with fresh gasoline.

5. See Engine Service Dealer.

6. Clean air cooling system (see Engine Owner’s Manual).

1. Engine cooling system clogged.

2. Carburetor out of adjustment.

3. Oil level is low.

1. Clean air cooling area (see Engine Owner’s Manual).

2. See Engine Service Dealer.

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

Engine does not

shut off.

1. Misadjusted throttle control or ignition switch.

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

Wheels and Tines

will not turn.

1. Improper use of controls.

1. Review Sections 3 and 4.

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

3. Internal transmission wear or damage.

4. Bolt loose in transmission pulley.

2. See “Checking Drive Belt Tension,” Section 5.

3 Contact local dealer or the factory.

4. Tighten bolt.

Tines turn, but

wheels don’t.

1. Wheel Drive Pins not in WHEEL DRIVE.

2. Bolt loose in transmission pulley.

1. See “Wheel Drive Pins” in Section 3.

2. Tighten bolt.

3. Internal transmission wear or damage.

3. Contact local Dealer or the Factory.

Wheels Turn, but

Tines Don’t.

1. Tine holder mounting hardware missing.

2. Bolt loose in transmission pulley.

1. Replace hardware.

2. Tighten bolt.

3. Internal transmission wear or damage.

3. Contact local Dealer or the Factory.

Poor tilling

1. Worn tines.

1. See “Bolo Tines” (Section 5).

performance.

2. Improper Depth Regulator setting.

3. Incorrect throttle setting.

4. Forward Drive Belt slipping.

2. See “Tilling Tips & Techniques,” Section 4.

3. See Section 4.

4. See “Checking Forward Drive Belt Tension,” Section 5.

TILLER ATTACHMENTS

The attachments listed below are available for your tiller. The information is the most current at the time this manual was printed.

Contact your authorized dealer or the factory for current information.

BUMPER – The tubular steel bumper surrounds the engine to protect the air cleaner, starter assembly and fuel tank from damage.

OEM-290-256 fits Tuffy, OEM-290-254 fit Bronco

FRAME WEIGHTS – Solid steel weights attach to the sides of the tiller frame to provide added traction to the wheels.

OEM-290-265 fits Tuffy, Bronco & Super Bronco

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Parts List 23

Models 634F, 634B and 630B

DRAWING NO. 1

REF.

No.

PART

No.

REF.

No.

PART

No.

DESCRIPTION

QTY.

DESCRIPTION

QTY.

710-0599

Hex Hd. Flange Screw, Self-Tapping,

1/4-20 x 1/2 ...................................

Decal, Hood .......................................

Tine Hood (Incl. tine flap and

Ref. 3) (A) .......................................

Tine Hood (Incl. tine flap and

Ref. 3) (B) (C) .................................

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

Hex Flange Lock Nut, 5/16-18.............

Depth Regulator Lever ........................

Spirol Pin ............................................

Spring, Depth Regulator .....................

GW-9534

710-0597

712-0291

Spacer ................................................

Hex Hd. Screw, 1/4-20 x 1 ..................

Hex Lock Nut, 1/4-20..........................

777S30649

1904572

GW-55013-2 Hood Bracket, Right Hand...................

GW-55013-1 Hood Bracket, Left Hand .....................

736-0119

1186331

712-3009

710-0874

GW-55088

GW-55015

1917594

Lock washer, 5/16...............................

Hex Hd. Flange Screw, 5/16-18 x 1 ....

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

Hex Hd. Screw, 5/16-18 x 1-1/4..........

Bushing...............................................

Drag Bar..............................................

710-3039

712-3004A

GW-55018

1185469

GW-9384

(A) For Model 630B

(B) For Model 634F

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24 Parts List

Models 634F, 634B and 630B

DRAWING NO. 2

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Parts List 25

Models 634F, 634B and 630B

PARTS LIST - DRAWING NO. 2

REF.

No.

PART

No.

REF.

No.

PART

No.

DESCRIPTION

QTY.

DESCRIPTION

QTY.

GW-55104

1916996

Upper Handlebar (Incl. Ref. 2) (A).......

Upper Handlebar (Incl. Refs. 2 &

710-0376

GW-55042

712-3010

GW-55043

710-0599

Hex Hd. Screw, 5/16-18 x 3/4..............

Handlebar Support ..............................

Hex Lock Nut, 5/16-18.........................

Lower Handlebar .................................

Hex Screw, 1/4-20 x 1/2, Self-Tap (A) .

28) (B)(C) ........................................

Decal, Forward Clutch Bail ..................

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

Hex Hd. Screw, 1/4-20 x 1-1/4 ............

Bracket, Forward Clutch Cable.............

Bail, Forward Clutch ............................

Screw, #10-24 x 2 ...............................

Spring, Forward Clutch........................

Lock Washer, 5/16 ..............................

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

Hex Lock Nut, 1/4-20...........................

Cable Assembly, Forward Clutch .........

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

Hex Lock Nut, 3/8-16...........................

Flat Washer, 3/8 ..................................

777I20937

710-0805

710-0106

1901077

1917479

GW-9855

1916712

736-0119

712-3010

712-0291

1918745

710-0514

712-3017

736-3050

Hex Screw, 1/4-20 x 1/2, Self-Tap (B)(C) 6

1901273010 Panel ...................................................

777D05556

777D05551

777D05555

1916674

Decal, Model Name/Logo (A)...............

Decal, Model Name/Logo (B)...............

Decal, Model Name/Logo (C)...............

Bracket, Reverse Clutch Cable (B)(C)..

Cable Ass'y, Reverse Clutch (B)(C) .....

Hex Nut, #10-24 ..................................

Decal, Reverse Drive Control (B)(C) ....

Cable Tie (B)(C)...................................

Lock Washer, 3/8 ................................

1916719

712-0121

777I20941

725-0157

736-0169

(A) For Model 630B

(B) For Model 634F

DRAWING/PARTS LIST NO. 3

REF.

No.

PART

No.

DESCRIPTION

QTY.

710-0157

710-0117

GW-9944

Hex Screw, 5/16-24 x 3/4, Grade 5 (A) ...

Hex Screw, 5/16-24 x 1, Grade 5 (B)(C)

Belleville Washer ...................................

GW-55031 Transmission Pulley (A) ........................

1916532

GW-9301

GW-50027 Support Washer, Front..........................

GW-9517

GW-1714

Transmission Pulley (B)(C)...................

Key, Transmission Pulley, 3/16 x 1 .......

Snap Ring..............................................

Bearing, Tapered Roller (with race).......

GW-50043 Support Washer, Rear...........................

1904281 Drive Shaft Ass’y...................................

GW-1224-1 Shim, Rear Bearing Cap, .010" thick ..... A/R

GW-1224-2 Shim, same as above, except

.030" thick ......................................... A/R

GW-1224-3 Shim, same as above, except

.005" thick......................................... A/R

GW-1224-4 Shim, same as above, except

.062" thick......................................... A/R

GW-1325C Shim Set (Incl. the following shims:

two #1224-1, two 1224-2,

one 1224-3, and one #1224-4)......... A/R

(A) For Model 630B

(B) For Model 634F

A/R – As Required

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26 Parts List

Models 634F, 634B and 630B

DRAWING NO. 4

REF.

No.

PART

No.

REF.

No.

PART

No.

DESCRIPTION

QTY.

DESCRIPTION

QTY.

GW-9512

1909950

Retainer, Snap Ring, “E” Type...........

Retainer, Snap Ring ..........................

Shim, 0.062" thick............................. A/R

Shim, 0.030" thick............................. A/R

Shim, 0.015" thick............................. A/R

Shim, 0.010" thick............................. A/R

Shim, 0.005" thick............................. A/R

GW-55004

1916741

GW-9305

GW-1132-2

1904278

1915074

GW-1104

1904279

Wheel Shaft (A).................................

Wheel Shaft (B)(C)............................

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

Spacer...............................................

Worm Gear, Wheel Shaft...................

Tiller Shaft.........................................

Woodruff Key ....................................

Worm Gear, Tiller Shaft.....................

GW-1166-1

GW-1166-2

GW-1166-3

GW-1166-4

GW-1166-5

GW-1086

Bronze Bushing.................................

(A) For Model 630B

(B) For Model 634F

A/R – As Required

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Parts List 27

Models 634F, 634B and 630B

DRAWING NO. 5

REF.

No.

PART

No.

REF.

No.

PART

No.

DESCRIPTION

QTY.

DESCRIPTION

QTY.

GW-9727

1186328

Plug, Transmission Oil Fill ..................

Hex Hd. Flange Screw, 5/16-18 x 5/8,

Grade 5 ..........................................

Front Cover, Transmission..................

Rear Cover, Transmission...................

Gasket, Housing Cover........................

Oil Seal, Drive Shaft ............................

Oil Seal, Wheel Shaft...........................

1916975

1909374

Transmission Housing Ass'y...............

Oil Seal, Tine Shaft .............................

GW-55011-1 Bearing Cap Gasket, .010" thick .........

GW-55011-2 Bearing Cap Gasket, .030" thick ..........

GW-55010

1186331

710-3008

736-0119

1916641

1918377

GW-50032

GW-9617

GW-9621

Rear Bearing Cap ...............................

Hex Hd. Flange Screw, 5/16-18 x 1 ....

Hex Hd. Flange Screw, 5/16-18 x 3/4..

Lock Washer, 5/16..............................

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28 Parts List

Models 634F, 634B and 630B

DRAWING NO. 6

Reverse Clutch Cable

15, 47

Forward Clutch Cable

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Parts List 29

Models 634F, 634B and 630B

REF.

No.

PART

No.

REF.

No.

PART

No.

DESCRIPTION

QTY.

DESCRIPTION

QTY.

Engine, Recoil Start.............................

Bracket, Belt Cover..............................

Lock Washer, 5/16..............................

Lock Washer, 5/16 (B)(C)...................

Hex Hd. Screw, 5/16-24 x 5/8 ............

Decal, Hot Surfaces Warning .............

Belt Cover (Incl. Ref. 5).......................

Hex Hd. Flange Screw, Self-Tapping,

1/4-20 x 1/2 ....................................

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

Support Washer..................................

Engine Bracket, Right..........................

1107382

GW-9929

GW-55037

1916657

GW-55034

1916658

GW-9944

GW-55031

1916532

GW-55049

777I20943

1186328

710-3008

736-3050

736-3090

1918731

1916535

710-3103

712-3009

1916725

1916724

1108841

GW-55036

GW-55039

710-0157

710-0376

Flat Washer.........................................

Forward Drive Belt (A) ........................

Forward Drive Belt (B)(C)....................

Forward Return Spring........................

Reverse Drive Belt (B)(C)....................

Belleville Washer.................................

Transmission Pulley (A)......................

Transmission Pulley (B)(C).................

Bracket, Cable Mounting.....................

Decal, Stabilization..............................

Hex Hd. Screw, 5/16-18 x 5/8.............

Hex Hd. Screw, 5/16-18 x 3/4.............

Flat Washer, 3/8..................................

Flat Washer.........................................

Reverse Idler Arm (B)(C) ....................

Pulley, Reverse Idler (B)(C) ................

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

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

Belt Guide (B)(C) ................................

Reverse Return Spring (B)(C).............

Key, 3/16" x 1-1/2" ..............................

Spacer (A)...........................................

Forward Belt Guide (A)........................

Hex Hd. Screw, 5/16-24 x 3/4 (A) .......

Hex Hd. Screw, 5/16-18 x 1 ................

1917326

736-0119

710-0237

777S30653

1917128

710-0599

712-3010

GW-50027

1916795

GW-1138-2

GW-9301

GW-55035

1916531

1917746

710-0117

1916794

710-0805

1916652

1916726

710-0520

GW-9090

1918744

712-3000

Shim ................................................... A/R

Key, 3/16" x 1".....................................

Pulley, Engine Drive (A) ......................

Pulley, Engine Drive (B)(C) .................

Shoulder Washer ................................

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

Engine Bracket, Left ............................

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

Guard, Belts/Pulleys............................

Forward Belt Guide (B)(C)...................

Hex Hd. Screw, 3/8-16 x 1-1/2............

Forward Idler Pulley............................

Forward Idler Lever.............................

Lock Nut, 3/8-16.................................

(A) For Model 630B

(B) For Model 634F

A/R – As Required

* Contact your local authorized engine service dealer for engine parts and

service. Refer to your engine nameplate for engine model/type number.

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30 Parts List

Models 634F, 634B and 630B

DRAWING NO. 7

LEFT SIDE

RIGHT SIDE

Hold Tine With Blunt End Toward You

Right Hand Tine

Left Hand Tine

NOTE: Identify Left and Right sides of tiller by standing in

operator position and facing direction of forward travel.

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Parts List 31

Models 634F, 634B and 630B

REF.

No.

PART

No.

REF.

No.

PART

No.

DESCRIPTION

QTY.

DESCRIPTION

QTY.

710-3005

50049-01

Hex Hd. Screw, 3/8-16 x 1-1/4, Grade 5 16

Bolo Tine - Right Hand. Single tine used

on left side of tiller. (Incl. two each

1916747

1915075

1917486

1917487

55095-01

55095-02

GW-9380

GW-9338

712-3017

736-0169

Tine Holder (B)(C).................................

Tine Holder (A)......................................

Wheel & Tire Ass'y. (B).........................

Wheel & Tire Ass'y. (C).........................

Wheel & Tire Ass'y. – Left Side (A) .......

Wheel & Tire Ass'y. – Right Side (A).....

Clevis Pin, .312" x 1-3/4" .......................

Hair Pin Cotter.......................................

Refs. 1 & 3).......................................

Hex Lock Nut, 3/8-16 ............................

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

Bolo Tine Replacement Set (Incl. eight

right hand tines, eight left hand tines

and required hardware ......................

Bolo Tine - Left Hand. Single tine used

on right side of tiller. (Incl. two each

Refs. 1 & 3).......................................

----

712-3000

710-0347

GW-1901

Hex Nut, 3/8-16..................................... 16

Lock Washer, 3/8 .................................. 16

50049-02

(A) For Model 630B

(B) For Model 634F

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TROY-BILT TILLER LIFETIME LIMITED WARRANTY

WHAT PRODUCT

IS COVERED

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

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

of the tiller, to the original purchaser only.

WHAT IS COVERED

BY THIS WARRANTY

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.

WHAT IS NOT

COVERED BY THIS

WARRANTY

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 nor-

mally replaced through periodic maintenance.

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

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

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

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

warranty for terms and conditions.

LIMITED

COMMERCIAL

USE WARRANTY

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

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

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

neglect, improper maintenance, vandalism, theft, fire, water, or damage because of peril or other natural

disaster.

HOW TO OBTAIN

SERVICE

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

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

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

www.troybilt.com.

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

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

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

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

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

purchased for commercial or other non-residential use).

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

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

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

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

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

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