Troy-Bilt 630B, 634F, 634B User Manual
Operator’s Manual
Rear-tine Tiller Models
630B—Tuffy
®
634F—Bronco
TM
634B—Super Bronco
TM
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any). If a
spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law
(Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester
for the muffler is available by contacting the service department at Troy-Bilt LLC, P.O. Box 361131 Cleveland, Ohio 44136-0019.
IMPORTANT:READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
TROY-BILT LLC, P.O. BOX 361131, CLEVELAND, OH 44136-0019
PRINTED IN USA FROM NO. 770-10594A
(12/2001)
Model 634B Shown
For more details about your unit, visit our website at www.troybilt.com
T
ABLE OF CONTENTS
Content Page
Calling Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Features and Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Off-Season Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Warrany Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
FINDING MODEL NUMBER
This Operator’s Manual is an important part of your new Rear-tineTiller. It will help you assemble, prepare and maintain the unit for best performance. Please read and understand what it says.
Before you start assembling your new equipment, please locate the model plate on the equipment and copy the information from it in the space provided below. This information is very important if you need help from our Customer
Support Department or an authorized dealer.
• You can locate the model number by looking at the rear surface of the tine shield. A sample model plate is
explained below. For future reference, please copy the model number and the serial number of the equipment
in the space below
ENGINE INFORMATION
The engine manufacturer is responsible for all engine-related issues with regards to performance, power-rating, specifications, warranty and service. Please refer to the engine manufacturer’s Owner’s/Operator’s Manual packed separately with your unit for more information.
CALLING CUSTOMER SUPPORT
If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance
of this unit, please call the Customer Support Department.
Call 1- (330) 558-7220 or 1- (866) 840-6483 to reach a Customer Support representative. Please have
your unit’s model number and serial number ready when you call. See previous section to locate this
information. You will be asked to enter the serial number in order to process your call ..
2
Copy Model Number Here
www.troybilt.com
TROY-BILT LLC
P. O. BOX
CLEVELAND, OH 44136
330-558-7220
866-840-6483
361131
Copy Serial Number Here
Safety
1
Section
3
Training
1. Carefully read this Owner’s
Manual, the separate Engine
Owner’s Manual, and any
other literature you may receive. Be thoroughly 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.
2. Never allow children to operate the
tiller. Never allow adults to operate the
tiller without proper instruction.
3. Keep the area of operation clear of all
persons, particularly children and pets.
4. Keep in mind that the operator or user
is responsible for accidents or hazards
occurring to other people, their property,
and themselves.
Preparation
1. Thoroughly inspect the area where the
tiller is to be used and remove all foreign
objects.
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
wearing adequate outer garments. Avoid
loose garments or jewelry that could get
caught in moving parts.
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.
5. Do not till near underground electric
cables, telephone lines, pipes or hoses. If
in doubt, contact your telephone or utility
company.
6. Warning: Handle fuel with care; it is
highly flammable and its vapors are explosive. Take the following precautions:
a. Store fuel in containers specifically
designed for this purpose.
b. The gas cap shall never be removed
or fuel added while the engine is running. 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.
e. Replace all fuel tank and container
caps securely.
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.
7. Never make adjustments when engine
is running (unless recommended by
manufacturer).
Operation
1. Do not put hands or feet near or under
rotating parts.
2. Exercise extreme caution when on or
crossing gravel drives, walks, or roads.
Stay alert for hidden hazards or traffic. Do
not carry passengers.
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.
Figure 1-1: Tiller features and controls (5.5HP Model shown). See separate
Engine Owner’s Manual to identify engine controls.
Forward Clutch Bail
Depth Regulator
Tine Hood Flap
Standard-RotatingTines (SRT)
Wheel Drive Pin
(on each wheel)
Reverse Clutch
Control (Models
634F/634B)
The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects or other reproductive harm.
WARNING
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.
Safety Alert Symbol
This is a safety alert symbol. It is used in this
manual and on the unit to alert you to potential hazards. When you see this symbol, read
and obey the message that follows it. Failure
to obey safety messages could result in
personal injury or property damage.
BRONCO
4 Section 1: Safety
4. Exercise caution to avoid slipping or
falling.
5. If the unit should start to vibrate abnormally, stop the engine, disconnect the
spark plug wire and prevent it from
touching the spark plug, and check immediately for the cause. Vibration is generally a warning of trouble.
6. Stop the engine, disconnect the spark
plug wire and prevent it from touching the
spark plug, whenever you leave the operating position, before unclogging the tines,
or when making any repairs, adjustments
or inspections.
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.
8. Before cleaning, repairing, or
inspecting, stop the engine and make certain all moving parts have stopped. Disconnect the spark plug wire and prevent it
from touching the spark plug to prevent
accidental starting.
9. The flap on the tine hood must be down
when operating the tiller.
10. Never use the tiller unless proper
guards, plates, or other safety protective
devices are in place.
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.
12. Keep children and pets away.
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).
14. Be aware that the tiller may unexpectedly 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 conditions, always use the following
operating precautions to assist you in
maintaining control of the tiller:
a. Walk behind and to one side of the
tiller, using one hand on the handlebars. 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.
15. Do not overload the tiller’s capacity by
attempting to till too deeply at too fast a
rate.
16. Never operate the tiller at high transport speeds on hard or slippery surfaces.
Look behind and use care when backing
up.
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.
18. Never allow bystanders near the unit.
19. Only use attachments and accessories
that are approved by the manufacturer of
the tiller.
20. Use tiller attachments and accessories
when recommended.
21. Never operate the tiller without good
visibility or light.
22. Never operate the tiller if you are tired;
or under the influence of alcohol, drugs or
medication.
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.
24. Do not touch engine parts which may
be hot from operation. Let parts cool down
sufficiently.
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”.
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.
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.
Maintenance and Storage
1. Keep the tiller, attachments and accessories in safe working condition.
2. Check all nuts, bolts, and screws at
frequent intervals for proper tightness to
be sure the equipment is in safe working
condition.
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.
4. To reduce the chances of a fire hazard,
keep the engine free of grass, leaves, or
excessive grease.
5. Store gasoline in a cool, well-ventilated
area, safely away from any spark- or
flame-producing equipment. Store gasoline in an approved container, safely away
from the reach of children.
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.
7. Never perform maintenance while the
engine is running or the spark plug wire is
connected, except when specifically
instructed to do so.
8. If the fuel tank has to be drained, do
this outdoors.
Section 1: Safety 5
Decals
For your safety and the safety of
others, various safety and operational decals are located on your
unit (see Figure 1-2).
Keep the decals clean and legible at
all times. Contact your local service dealer or the factory for
replacements if any decals are
damaged or missing.
Refer to the Parts List pages in this
Manual for decal locations, descriptions and part numbers.
Forward Clutch Bail
Operating Instruction
Reverse Clutch Control
Operating Instruction
(Models 634F/634B)
Warning Messages
Hot Surfaces Warning
(on belt cover)
Starting Stabilization
Message (on engine)
Figure 1-2: Location of safety and operating decals (5.5HP Model shown).
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 UNCLOGGING 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.
WARNING
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.
FAST
SLOW
CHOKE
ON
CHOKE
OFF
STOP
REVERSE
R
ROTATING
TINES
BAIL
ENGAGED
BAIL
DISENGAGED
TILLER DIRECTION
LEVER DIRECTION
BRONCO
STOP
Assembly
2
Section
6
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.
NOTE: Various tiller models are presented
in this Manual. Use only the information
appropriate for your tiller model.
INSPECT UNIT
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 carrier within 15 days after the unit has been
delivered. Contact the factory if you need
assistance in this matter.
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*
(1) Large adjustable wrench (Models
634F/634B only)
(1) Scissors (to trim plastic ties)
(1) Ruler (for belt tension check)
(1) Block of wood (to support tiller
when removing wheels)
(1) Tire pressure gauge (for models with
pneumatic tires)
(1) Clean oil funnel
(1) Motor oil. Refer to the Engine Owner’s
Manual for oil specifications and
quantity required.
* Adjustable wrenches may be used.
ASSEMBLY STEPS
STEP 1: UNPACKING INSTRUCTIONS
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 shipping 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.
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 damaged). NOTE: Use the screw length template (Fig. 2-1) to identify screws.
Loose Parts List
Qty. Description
1 Handlebar Support (see A, Fig. 2-2)
1 Handlebar Assembly (see K, Fig. 2-2)
Hardware bag contents:
1 Slotted hd. screw, #10-24 x 2"
1 Hex hd. screw, 1/4-20 x 1-1/4"
6 Hex hd. screw, 5/16-18 x 1-1/2"
2 Hex hd. screw, 3/8-16 x 3/4"
2 Flat washer, 3/8"
6 Split lockwasher, 5/16"
1 Hex locknut, 1/4"-20
6 Hex nut, 5/16"-18
1 Hex nut, #10-24
2 Hex locknut, 3/8"-16
1 Spring, cable (see W, Fig. 2-5)
1 Bracket, forward clutch cable (see
P, Fig. 2-4)
2 Lock Washer, 3/8
2*Self-tapping screw, 1/4-20 x 1/2"
1 *Bracket, reverse clutch cable
*Model 634F & 634B only
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.
NOTE: LEFT and RIGHT sides of the tiller
are as viewed from the operator’s position
behind the handlebars.
STEP 2: ATTACH HANDLEBAR
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).
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.
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.
4. Tighten all handlebar mounting hardware securely.
STEP 3: MOVE TILLER OFF
SHIPPING PLATFORM
To roll the tiller off the shipping platform,
put the wheels in FREEWHEEL, as follows:
1. Place a sturdy block under the transmission to raise one wheel about 1" off the
ground.
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.
Figure 2-1: To identify length of screws,
place screw on template as shown and measure distance between bottom of screw head
and tip of screw.
WARNING
1
1
2
2
Section 2: Assembly 7
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.
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 connector (U, Fig. 2-4) up through the hole in
the bracket until the groove in the connector snaps into place.
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.
G
G
H
A
I
H
F
E
I
H
I
B
C
G
GG
K
J
D
Fig. 2-3: Wheel in FREEWHEEL position
(wheel drive pin through wheel shaft only).
M
O
N
L
Fig. 2-4: Installing forward clutch cable bracket and cable.
P
R
S
T
T
U
A
Fig. 2-2: Attach handlebar (5.5HP Model shown).
8 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 forward drive belt by taking two measurements of the cable spring, as follows:
a. With the Forward Clutch Bail (Y, Fig. 2-
6) in an open (released) position, measure the length of the cable spring (W)
from the outermost coil to the outermost coil.
b. Squeeze the Forward Clutch Bail against
the handlebar (see Fig. 2-7) and remeasure the spring length. The belt
tension is correct if this second measurement 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 preventing the cable adjuster from turning.
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).
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.
2. Using the two self-tapping screws (AA,
Fig. 2-8) secure the reverse cable
mounting bracket (BB)to the handlebars,
as shown.
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.
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 neutral position (resting against bracket). If it
doesn’t, contact your local dealer or the
factory for technical assistance.
W
Z
X
V
Fig. 2-6: Attach forward
clutch cable spring to
forward clutch bail.
Y
W
Fig. 2-5: Cable
spring and
adjuster.
Fig. 2-7: To check forward belt tension, take two measurements of the length of the coils in
the spring – first with the bail open, then with the bail held against the handlebar.
X
Z
Hold bail against handlebar while
taking second measurement of
spring
Fig. 2-8: Install reverse cable bracket and
reverse clutch cable.
CC
AA
AA
BB
Flat Side
DD
Fig. 2-9: Route reverse clutch cable (CC) as
shown. Attach with cable tie (EE).
CC
EE
5
4
3
2
1
BRONCO
Section 2: Assembly 9
STEP 6: CHECK LEVEL OF
TRANSMISSION GEAR OIL
The transmission was filled with gear oil at
the factory. However, you should check
the gear oil level at this time to make certain it is correct.
IMPORTANT: Do not operate the tiller if
the gear oil level is low. Doing so will
result in severe damage to the transmission 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.
STEP 7: ADD MOTOR OIL
TO ENGINE
The tiller is shipped without oil in the
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.
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.
FF
Fig. 2-11: Remove gear oil fill plug.
GG
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
Features and Controls
3
Section
10
INTRODUCTION
This Section describes the location and
function of the controls on your tiller.
Refer to the following Section, Operation
for detailed operating instructions.
Practice using these controls, with the
engine shut off, until you understand the
operation of the controls and feel confident with each of them.
ENGINE CONTROLS
Refer to the engine manufacturer’s Engine
Owner’s Manual (included in the tiller literature package) to identify the controls on
your engine.
IMPORTANT: The control for stopping the
engine is located on the engine.
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.
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
Forward Clutch Bail (all models) or the
Reverse Clutch Control (Models 634F and
634B) is engaged.
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.
To place the wheels in WHEEL DRIVE or
FREEWHEEL:
1. Stop engine, disconnect spark plug wire
from spark plug and allow engine to cool.
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).
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
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.
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
(C) by pushing hairpin cotter in as far as it
will go. Repeat for the other wheel and
then remove the support from beneath the
transmission.
Before operating your machine, carefully read and understand all safety,
controls and operating instructions in
this Manual, the separate Engine
Owner’s Manual, and on the decals on
the machine.
Failure to follow these instructions can
result in serious personal injury.
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 comply could cause loss of
tiller control, property damage, or personal injury.
Figure 3-1: Tiller features and controls (5.5HP Model shown). See separate Engine Owner’s
Manual to identify engine controls.
Wheel Drive Pin
(on each wheel)
Forward Clutch Bail
Reverse Clutch
Control (Models
634F/634B)
Depth Regulator
Handlebar Height
Adjustment
Do not place tiller on its side when
changing wheel drive positions. Doing
so could result in gasoline leaking from
the fuel tank.
Failure to follow this instruction could
result in personal injury or property
damage.
Figure 3-2: WHEEL DRIVE position.
A
B
D
C
WARNING
BRONCO
WARNING
WARNING
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