Sharp R-634F Operator`s manual

Operator’s Manual
Rear-tine Tiller Models
630C—Tuffy®
634F—Bronco
634A—Super Bronco
TM
TM
Model 634A Shown
IMPORTANT: Read safety rules and instructions carefully before operating equipment.
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brushcovered 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 through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131
Cleveland, Ohio 44136-0019.
Troy-Bilt LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019
PRINTED IN U.S.A.
FORM NO.
770-10594D.fm
11/19/03
TABLE OF CONTENTS
Content
Customer Support
Safety
Assembly
Features and Controls
Operation
Page
2
3
6
10
12
Content
Maintenance
Off-season Storage
Troubleshooting
Parts List
Warranty
Page
17
21
22
23
Back Cover
FINDING MODEL NUMBER
This Operator’s Manual is an important part of your new lawn tractor. It will help you assemble, prepare and maintain the
unit for best performance. Please read and understand what it says.
Before you start assembling your new equipment, please locate the model plate on the equipment and
copy the information from it in the space provided below. A sample model plate is also given below. You can
locate the model plate by looking at the rear of the tine shield. This information will be necessary to use the
manufacturer’s web site and/or help from the Customer Support Department or an authorized service dealer.
Copy the model number here:
www.troybilt.com
TROY-BILT LLC
P. O. BOX 3 6 1 1 3 1
CLEVELAND, OH 44136
330-558-7220
1-800-520-5520
Copy the serial number here:
CUSTOMER SUPPORT
Please do NOT return the unit to the retailer without first contacting Customer Support.
If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of
this unit, you can seek help from the experts. Choose from the options below:
Visit troy-bilt.com for many useful suggestions. Click on Customer Support button and you
will get the four options reproduced here. Click on the appropriate button and help is
immediately available.
The answer you are
looking for could be just
a mouse click away!
The answer you are
looking for could be just
a mouse click away!
If you prefer to reach a Customer Support Representative, please call 1(800) 520-5520.
Engine
Manual
The engine manufacturer is responsible for all engine-related issues with regard to
performance, power-rating, specifications, warranty and service. Please refer to the engine
manufacturer’s Owner’s/Operator’s Manual, packed separately with your unit, for more
information.
2
SECTION 1: 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.
Forward Clutch Bail
Reverse Clutch Control
(Models 634F⁄634A)
WARNING
Depth Regulator
The engine exhaust from this product contains
chemicals known to the State of California to
cause cancer, birth defects or other reproduc-
Tine Hood Flap
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.
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.
Standard-Rotating-Tines
(SRT)
Wheel Drive Pin
Figure 1-1: Tiller features and controls. See separate Engine Owner’s Manual to
identify engine controls.
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.
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.
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).
6. Warning: Handle fuel with care; it is
highly flammable and its vapors are explosive. Take the following precautions:
Operation
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.
3
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.
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⁄634A 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 handle
bars Relax your arm, but use a
secure hand grip.
b. Use shallower depth regulator
settings, working gradually deeper
with each pass.
c. Use slower engine speeds.
d. Clear the tilling area of all large
stones, roots or 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.
4
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
634A 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
ervals 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. Refed 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.
Decals
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.
Reverse Clutch Control
Operating Instruction
(Models 634F/634A)
Forward Clutch Bail
For your safety and the safety of others, various safety and operational decals are located
on your unit (see Figure 1-2).
Starting Stabilization
Message (on engine)
Warning Messages
Refer to the Parts List pages in this Manual for
decal locations, descriptions and part numbers.
Hot Surfaces Warning
Figure 1-2: Location of safety and operating decals.
Operating Symbols
Various symbols (shown here, with word descriptions)
may be used on the tiller and engine.
NOTE: Your unit may not have all of the symbols.
R
CHOKE
ON
CHOKE
OFF
REVERSE
ROTATING TINES
BAIL
ENGAGED
FAST
SLOW
STOP
TILLER DIRECTION
LEVER DIRECTION
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 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.
5
BAIL
DISENGAGED
SECTION 2: ASSEMBLY
WARNING: To prevent
personal injury or property
damage, do not start the engine
until all assembly steps are
complete and you have read
and understand the safety and
operating instructions in this
manual.
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. Engine styles vary by model. Your
engine may appear differently than those
illustrated in this manual.
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 Troy-Bilt LLC if you
need assistance in this matter.
TOOLS / MATERIALS NEEDED
(2)
(2)
(1)
(1)
1/2” open-end wrench*
9/16" open-end wrench*
3/8" open-end wrench*
Large adjustable wrench
(Models 634F/634A 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.
1
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:
4
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"
4
Split lockwasher, 5/16"
4
Hex nut, 5/16"-18
2
Hex locknut, 3⁄8"-16
*Model 634F & 634A only
IMPORTANT: Motor oil must be added to
the engine crankcase before the engine is
started. Follow the instructions in this
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), and
3/8"-16 hex locknuts (D).
6
2
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.
2. Using two 5/16"-18 x 1-1/2" screws (G),
5/16" split lockwashers (H) and 5/16"-18
hex nuts (I), loosely attach the handlebar
support (A) using the upper holes. Tighten
the two screws securely.
3. 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 outside of the handlebar assembly
(K) 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.
IMPORTANT: The support brackets must
be assembled to the outside of the
handlebar assembly.
4. Tighten all handlebar mounting hardware securely.
STEP 3: MOVE TILLER OFF CRATE
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.
2. Remove the hairpin cotter (L, Fig. 2-3)
and wheel drive pin (M) from the wheel
hub (O) and wheel shaft (N).
K
M
O
N
L
Fig. 2-3: Wheel in FREEWHEEL position
G
I
H
A
STEP 4: INSTALL FORWARD
CLUTCH CABLE
1. 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.
F
G
E
C
F
2. Thread the #10-24 hex nut (Z, Fig. 2-5)
halfway onto the screw (V) which runs
through the spring (W, Fig. 2-5).
J
D
3. Thread the screw (V) into the cable adjuster (X).
B
Fig. 2.2: Attach handlebar.
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.
T
T
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.
U
Fig. 2-4: Installing forward clutch cable bracket and cable.
7
6
4
5
4. Check for correct tension on the forward
drive belt by taking two measurements of
the cable spring, as follows:
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 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).
Y
W
Z
V
W
X
Z
1
2
3
a. With the Forward Clutch Bail (Y, Fig. 26) in an open (released) position, measure
the length of the cable spring (W) from the
outermost coil to the outermost coil.
X
Hold bail against handlebar while
taking second measurement of spring
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.
STEP 5: INSTALL REVERSE CLUTCH
CABLE (MODELS 634F & 634A 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. 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.
3. Fasten the reverse clutch cable to the
left side handlebar with a cable tie (EE, Fig.
2-9).
4. 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 Troy-Bilt LLC
for technical assistance.
Fig. 2-5: Cable
spring and
adjuster.
BB
DD
CC
Flat Side
Fig. 2-8: Install reverse cable bracket and
reverse clutch cable.
CC
Fig. 2-6: Attach forward
clutch cable spring to
forward clutch bail.
BRONC
O
EE
Fig. 2-9: Route reverse clutch cable (CC) as
shown. Attach with cable tie (EE).
8
STEP 6: CHECK TRANSMISSION
OIL LEVEL
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
STEP 8: CHECK HARDWARE
The tiller is shipped without oil in the engine.
Check all nuts and screws for tightness.
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 9: CHECK AIR PRESSURE IN
TIRES (units with pneumatic tires)
Check the air pressure with a tire gauge.
Deflate or inflate the tires equally to between 15 PSI and 20 PSI (pounds per
square inch). Be sure that both tires are inflated equally or the unit will pull to one
side.
FF
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
GG
Fig. 2-11: Remove gear oil fill plug.
9
SECTION 3: FEATURES AND CONTROLS
WARNING: Before
operating your machine,
carefully read and understand
all safety, controls and
operating instructions in this
Manual, the separate Engine
Owner’s Manual, and on the
decals on the machine.
Failure to follow these
instructions can result in
serious personal injury.
Forward Clutch Bail
Reverse Clutch Control
(Models 634F/634A)
Depth Regulator
INTRODUCTION
Handlebar Height Adjustment
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.
WARNING: 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.
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
Wheel Drive Pin
(on each wheel)
Figure 3-1: Tiller features and controls. See seperate Engine Owner’s Manual to identify
engine controls.
Forward Clutch Bail (all models) or the Reverse Clutch Control (Models 634F and
634A) 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.
WARNING: 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.
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
10
A
D
B
C
Figure 3-2: WHEEL DRIVE position.
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.
A
D
B
C
WARNING: Use extreme
caution when reversing or
pulling the machine towards
you. Look behind to avoid
obstacles.
Never attempt to till in reverse.
Failure to follow this warning
could result in personal injury
or property damage.
To operate the Reverse Clutch Control:
1. Put wheels in WHEEL DRIVE position
(see “WARNING” statement at the left).
Figure 3-3: FREEWHEEL position.
WARNING: Before starting
engine, be sure that both
wheels are in WHEEL DRIVE
position. See Wheels Drive
Pins for instructions.
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.
Failure to comply could cause
loss of tiller control, property
damage, or personal injury.
2. Stop all tiller motion by releasing the
Forward Clutch Bail.
3. Lift the handlebar until the tines clear
the ground, look behind you to avoid any
obstacles, and then pull the control knob
(F, Figure 3-4) out. The wheels and tines
will rotate in a reverse direction.
4. Release the control knob to disengage
(stop) the wheels and tines (the engine will
continue to run).
3. Release the clutch bail to disengage
(stop) the wheels and tines (the engine will
continue to run).
REVERSE CLUTCH CONTROL
(Models 634F/634A only)
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.
Travel Position
Shallow
Settings
G
Deep
Settings
HANDLEBAR HEIGHT ADJUSTMENT
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:
2. Lift and hold the clutch bail (E, Figure 34) against the handlebar to start the wheels
and tines rotating in a forward direction.
WARNING: Do not attempt
to till too deeply too quickly.
Gradually work down to deeper
tilling depths.
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.
Failure to follow this warning
could result in personal injury
or property damage.
Figure 3-5: Depth Regulator Lever (G).
FORWARD CLUTCH BAIL
1. Put wheels in WHEEL DRIVE position
(see “WARNING” statement above).
begin tilling at a very shallow depth setting
and gradually increase the tilling depth.
F
E
Figure 3-4: All models have a Forward Clutch
Bail (E). Only Models 634F/634A have a Reverse Clutch Control (F).
DEPTH REGULATOR LEVER
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.
To adjust the handlebars:
1. Stop engine, disconnect spark plug
wire from spark plug and allow engine to
cool.
2. Remove hardware, reposition handlebars, and reinstall hardware securely.
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.
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.
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 results, always
11
High
Medium
Low
Figure 3-6: Handlebar height adjustment.
SECTION 4: OPERATION
WARNING: Before
operating your machine,
carefully read and understand
all safety (Section 1), controls
(Section 3) and operating
instructions (Section 4) in this
Manual, the separate Engine
Owner’s Manual, and on the
decals on the machine.
Failure to follow these
instructions can result in
serious personal injury.
Reverse Clutch Control
(Models 634F/634A)
Forward
Clutch Bail
Depth Regulator
INTRODUCTION
Read this Operation Section and the separate Engine Owner’s Manual before you
start the engine. Then, take the time to familiarize yourself with the basic operation
of the tiller before using it in the garden.
Find an open, level area and practice using
the tiller controls without the tines engaging the soil (put tines in “travel” setting).
Only after you’ve become completely familiar with the tiller should you begin using
it in the garden.
BREAK-IN OPERATION
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.
STARTING AND STOPPING
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 hardware. Service as required.
4. Check engine oil level. See Engine
Owner’s Manual.
Wheel Drive Pin
Fig. 4-1
5. Check that all safety guards and covers
are in place.
6. Check air cleaner and engine cooling
system. See Engine Owner’s Manual.
WARNING: GASOLINE IS
HIGHLY FLAMMABLE AND ITS
VAPORS ARE EXPLOSIVE.
Follow gasoline safety rules in
this Manual (see Section 1) and
in the separate Engine Owner’s
Manual.
Failure to follow gasoline safety
instructions can result in
serious personal injury and
property damage.
7. Fill the fuel tank with gasoline according
to the directions in the separate Engine
Owner’s Manual. Follow all instructions
and safety rules carefully.
8. Attach spark plug wire to spark plug.
Starting the Engine
The following steps describe how to start
and stop the engine.
WARNING: Do not attempt
to engage the tines or wheels
until you have read all of the
operating instructions 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.
12
1. Complete the Pre-Start Checklist on
this page.
2. Put the wheels in the WHEEL DRIVE position (see Wheel Drive Pins in Section 3 of
this manual).
WARNING: To help
prevent serious personal injury
or damage to equipment:
• 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.
• Before starting engine, put Forward
Clutch Bail (all models) and Reverse
Clutch Control (Models 634F/634A
only) in neutral (disengaged) positions
by releasing levers.
• Never run engine indoors or in enclosed, poorly ventilated areas. Engine
exhaust contains carbon monoxide, an
odorless and deadly gas.
• Avoid engine muffler and nearby areas.
Temperatures in these areas may exceed 150° F.
3. Move the Depth Regulator Lever all the
way down to the “travel” position, so that
the tines clear the ground.
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.
6. Put ignition switch and/or throttle control lever located on engine in the “ON”,
“RUN”, “FAST” or “START” position, as instructed in the Engine Owner’s Manual.
7. Choke or prime engine, as instructed in
Engine Owner’s Manual.
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.
Stopping the Engine and Tiller
1. To stop the wheels and tines, release the
Forward Clutch Bail (all models) or the Reverse Clutch Control (Models 634F and
634A) — 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
The following operating instructions provide guidelines to using your tiller effectively and safely. Be sure to read Tilling
Tips & Techniques in this Section before
actually putting the tines into the soil.
NOTE: This is a traditional “Standard-Rotating-Tine” (SRT) tiller with forward rotating tines. It operates completely
differently from “Counter-Rotating-Tine”
(CRT) tillers or from front-tine tillers.
1. Follow the Pre-Start Checklist at the
beginning of this Section. Be sure that the
wheels are in the WHEEL DRIVE position.
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).
3. Start engine and allow it to warm up.
Then put throttle in “FAST” setting.
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) 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.
WARNING: Do not push
down on the handlebars to try
to make the tiller till more
deeply. This prevents the
wheels from holding the tiller
back and can allow the tines to
rapidly propel the tiller forward,
which could result in loss of
control, property damage, or
personal injury.
5. For reverse motion of the wheels and
tines (Models 634F/634A only):
(a) Look behind and exercise caution when
operating in reverse. Do not till while in
reverse.
(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.
(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.
(c) If longer distances need to be covered
in reverse, shut off the engine, then place
the two wheels in FREEWHEEL.
7. To Turn the Tiller Around:
(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).
(c) With tiller balanced, push sideways on
handlebar to steer in direction of turn (Fig.
4-5). After turning, slowly lower tines into
soil to resume tilling.
Fig. 4-4: To begin turn, lift handlebars until
tines are out of ground and unit is balanced.
Fig. 4-5: With tines out of ground, push handlebars sideways to turn tiller.
Fig. 4-3: Raise tines off ground and look
behind when moving in reverse.
Fig. 4-2: Use one hand to guide tiller when
moving forward.
6. To move the Model 630C in reverse for
short distances:
(a) Release forward Clutch Bail. Then lift
handlebar until tines are off the ground.
13
Stopping the Tiller and Engine
1. To stop the wheels and tines, release
the Forward Clutch Bail (all models) or the
Reverse Clutch Control (Models 634F and
634A) — 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.
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
telephone 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 handlebars 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 & 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
While tilling, relax and let the wheels pull the
tiller along while the tines do the digging.
Walk on the side that is not yet finished (to
avoid making footprints in the freshly tilled
soil) and lightly, but securely grip the handlebar with just one hand.
Avoid Tilling Soggy, Wet Soil
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.
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.
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. 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
1
at one-quarter width (see Fig. 4-8).
2
3
Fig. 4-8
14
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 future plant
growth.
Fig. 4-9
TILLING TIPS & TECHNIQUES (CON’T)
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 nutrients to the soil.
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.
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.
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.
WARNING: When power
composting, do not keep the
Depth Regulator Lever at a
deep setting if the tiller jumps
or bucks.
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.
Failure to follow this warning
could result in personal injury.
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
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).
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!
operate tiller on a slope too
steep for safe operation. Till
slowly and be sure you have
good footing. Never permit
tiller to freewheel down
slopes. Failure to follow this
warning could result in
personal injury.
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.
• 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.
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.
• 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.
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. Terraces
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.
15
TILLING TIPS & TECHNIQUES (CON’T)
Terrace Gardening (continued)
• 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.
Fig. 4-10
Clearing the Tines
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.
• 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.
LOADING AND UNLOADING
THE TILLER
WARNING: Loading and
unloading the tiller into a
vehicle is potentially hazardous
and we don’t recommend doing
so unless absolutely necessary,
as this could result in personal
injury or property damage.
However, if you must load or
unload the tiller, follow the
guidelines given next.
• Before loading or unloading, stop the engine, wait for all parts to stop moving,
disconnect the spark plug wire and let the
engine and muffler cool.
• The tiller is too heavy and bulky to lift
safely by one person. Two or more people
should share the load.
• 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.
• Use sturdy ramps and manually (engine
shut off) roll the tiller into and out of the
vehicle. Two or more people are needed to
do this.
• The ramps must be strong enough to
support the combined weight of the tiller
and any handlers. The ramps should provide 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.
• The handlers should wear sturdy footwear
that will help to prevent slipping.
• Position the loading vehicle so that the
ramp angle is as flat as possible (the less
incline to the ramp, thebetter). Turn the
vehicle’s engine off and apply its parking
brake.
• When going up ramps, stand in the
normal operating position and push the
16
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.
Failure to follow this warning could
result in personal injury.
tiller ahead of you. Have a person at each
side to turn the wheels.
• 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.
• 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 necessary), and to
chock the wheels in place after the tiller is
in the vehicle.
• After loading the tiller, prevent it from
rolling by engaging the wheels in the
WHEEL DRIVE position. Chock the wheels
with blocks and securely tie the tiller down.
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. Remove
ignition key on electric start
models.
Failure to follow these
instructions can result in serious
personal injury or property
damage.
MAINTENANCE SCHEDULE
PROCEDURE
NOTES
Check motor oil level
2, 3
Clean engine
2, 7
Check drive belt tension
1, 4
Check nuts and bolts
1, 4
Change motor oil
4, 6, 9
Lubricate tiller
4
Service engine air cleaner system
7
TILLER LUBRICATION
If a cover is leaking, check for loose
screws. If the screws are tight, a new
gasket or oil seal may be required.
After every 10 operating hours, oil or
grease the lubrication points shown in
Figure 5-1 and described below.
Use clean lubricating oil (#30 weight motor
oil is suitable) and clean general purpose
grease (grease containing a metal lubricant
is preferred, if available).
• Remove the wheels, clean the wheel shaft
(A, Fig. 5-1) and apply a thin coating of
grease to the wheel shaft.
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.
• Grease the back, front and sides of the
depth regulator lever (B, Fig. 5-1).
CHECK HARDWARE
• 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.
• Oil the threads on the handlebar height
adjustment screws and the handlebar
attaching screws (D, Fig. 5-1).
5
Check air pressure in tires
(if unit has pneumatic tires)
5
Service spark plug
7
89-
Be sure to check the screws underneath
the tiller hood that secure the transmission cover and the Depth Regulator Lever
to the transmission.
CHECK TIRE PRESSURE
D
Check the air pressure in both tires. The
air pressure should be between 15 PSI
and 20 PSI (pounds per square inch).
B
Keep both tires equally inflated to help
prevent machine from pulling to one
side.
NOTES
1234567-
Check for loose or missing hardware after every 10 operating hours and tighten
or replace (as needed) before reusing
tiller
(Models with pneumatic tires)
Check gear oil level in transmission 1, 5
Check tines for wear
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.
Check after first 2 hours of break-in operation.
Before each use.
Every 5 operating hours.
Every 10 operating hours.
Every 30 operating hours.
Change more frequently in dusty conditions.
See Engine Owner’s Manual for service
recommedations.
Whichever time interval occurs first.
Change after first 2 hours of break-in
TRANSMISSION
GEAR OIL SERVICE
C
A
Figure 5-1
CHECK FOR OIL LEAKS
Before each use, check the tiller for signs of
an oil leak — usually a dirty, oily accumulation either on the unit or on the floor.
A little seepage around a cover or an oil
seal is usually not a cause for alarm. However, if the oil drips overnight, then immediate attention is needed. Ignoring an oil
leak can result in severe transmission
damage!
17
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.
A. To Check the Transmission
Gear Oil Level:
1. Check the gear oil level when the
transmission is cool. Gear oil will
expand in warm operating temperatures
and this expansion will provide an incorrect oil level reading.
2. With the tiller on level ground, pull the
Depth Regulator Lever all the way up.
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.
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.
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 transmission components.
B. To Drain the Transmission Gear Oil:
The transmission gear oil does not need to
be changed unless it has been contaminated with dirt, sand or metal particles.
1. Drain gasoline from the fuel tank or run
the engine until the fuel tank is empty. See
“DANGER” statement below.
WARNING: Gasoline is
highly flammable and its vapors
are explosive. Follow these
safety practices to prevent
personal injury or property
damage from fire or explosion.
• Allow the engine and muffler to cool
for at least two minutes before draining the tiller’s gasoline tank.
B
A
B
• Do not allow open flames, sparks,
matches or smoking in the area.
• Wipe away spills and push tiller away
from spilled fuel.
• Use only an approved fuel container
and store it safely out of the reach of
children.
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.
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 transmission, use only GL-4 gear oil having a
viscosity of SAE 85W-140 or SAE 140.
IMPORTANT: Do not use automatic transmission fluid or motor oil in the transmission.
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.
8. Securely replace the oil fill plug.
• 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.)
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.
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).
9. Refill the engine with motor oil and replenish the fuel tank with gasoline.
18
BOLO TINES
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 complete set. See
the Parts List pages for tine identification
and part numbers.
A. Tine Inspection:
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.
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
the nuts.
2. When installing a single tine, be sure to
position it so that its cutting edge (sharp)
will enter the soil first as the tiller moves
forward.
C. Removing⁄Installing a Tine Assembly:
1. A tine assembly consists of eight tines
mounted on a tine holder.
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 necessary, use a rubber mallet to tap the tine assembly outward off the shaft.
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.
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
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.
b Unthread the hex nut (C, Figure 5-4)
halfway up the adjustment screw (D).
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 position) to increase tension on the spring. Turn the screw counterclockwise 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 (C) against the top of the adjuster
(B).
D
C
A
E
B
Replacement Belt Information
Figure 5-3: Install tines so that cutting edge of tines enter soil first when tiller moves forward.
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 movement 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.
5
CHECKING AND ADJUSTING
FORWARD DRIVE BELT TENSION
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 outermost coil
to the outermost coil.
3. Squeeze the Forward Clutch Bail
against the handlebar (see Figure 5-4) and
re-measure the length of the coils. The
3
4
• Check belt tension after the first two
hours of break-in operation and after every
10 operating hours.
2
A
C
1
• At the end of each tilling season, check
the belt for cracks, cuts or frayed edges
and replace it as soon as possible.
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 “overthe-counter” belt may not perform satisfactorily. The procedure requires average
mechanical ability and commonly available
tools.
belt tension is correct if this second measurement is between 1/6" -to- 3/16" longer
than the first measurement.
B
D
Hold bail against handlebar while
taking second measurement of spring
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.
19
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.
FORWARD CLUTCH
BAIL ADJUSTMENT
If the Forward Clutch Bail does not function 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 Troy-Bilt LLC or your authorized
dealer for service advice.
CHECKING AND ADJUSTING REVERSE DRIVE BELT TENSION
(Models 634F/634A 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.
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.
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.
7. Measure the gap by repeating Step 3.
Readjust as needed by repeating Steps 5
and 6.
8. Reinstall the belt cover.
• 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.
ENGINE CLEANING
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 servicing the
engine.
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.
ENGINE OIL SERVICE
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.
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.
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 “overthe-counter” belt may not perform satisfactorily. The procedure requires average
mechanical ability and commonly available
tools.
AIR CLEANER SERVICE
When checking belt tension, also check the
belt for cracks, cuts or frayed edges and
replace it as soon as possible.
2. Remove screw in plastic belt cover and
slide belt cover (which is attached to forward clutch cable) out of the way.
Replacement Belt Information
Check the engine oil level before each use
and after every five hours of continuous
operation. Running the engine when it is
low on oil will quickly ruin the engine.
D
C
A
Figure 5-6: Move threaded adjuster (A) to left
to increase belt tension.
20
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.
A. To Check the Engine Oil Level:
1. Park the tiller on a level area and shut
off the engine.
2. Level the engine (use the Depth Regulator Lever to adjust the engine angle).
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.
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.
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.
B. To Change the Engine Oil:
Change the engine oil as instructed in the
Engine Owner’s Manual.
SPARK PLUG SERVICE
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.
SPARK ARRESTER SCREEN
SERVICE
THROTTLE LEVER ADJUSTMENT
OFF-SEASON STORAGE
If the engine does not respond to various
throttle lever settings, refer to the Engine
Owner’s Manual for service information or
contact your local authorized engine dealer.
When the tiller won’t be used for an extended period, prepare it for storage as follows:
WARNING: Operators
shall not tamper with the engine
governor settings on the
machine; the governor controls
the maximum safe operating
speed to protect the engine and
all moving parts from damage
caused by overspeed.
Authorized service shall be
sought if a problem exists.
CARBURETOR/GOVERNOR
CONTROL ADJUSTMENTS
The carburetor was adjusted at the factory
for best operating speed. Refer to the Engine Owner’s Manual for any adjustment
information or see your authorized engine
dealer.
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.
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.
21
1. Clean the tiller and engine.
2. Do routine tiller lubrication and check
for loose parts and hardware.
3. Protect the engine and perform recommended engine maintenance by following
the storage instructions found in the Engine Owner’s Manual. Be sure to protect
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).
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, furnaces, etc.).
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
PROBLEM
Engine does not start
POSSIBLE CAUSE
CORRECTION
1.
Spark plug wire disconnected.
1.
Reconnect wire.
2.
Engine Throttle Control Lever incorrectly set.
2.
Put lever in START position.
3.
Fuel tank empty.
3.
Add fuel.
4.
Choke control (if so equipped) in incorrect position.
4.
See Engine Owner’s Manual.
5.
Stale gasoline.
5.
Drain fuel and add fresh fuel.
6.
Dirty air filter.
6.
Clean or replace filter.
7.
Defective or incorrectly gapped spark plug.
7.
Inspect spark plug.
8.
Carburetor out of adjustment.
8.
See Engine Service Dealer.
9.
Misadjusted throttle control.
9.
See Engine Service Dealer
10. Dirt or water in fuel tank.
10. See Engine Service Dealer.
1.
Defective or incorrectly gapped spark plug.
1.
Inspect spark plug (see Engine Owner’s Manual).
2.
Dirty air filter(s).
2.
Clean or replace (see Engine Owner’s Manual).
3.
Carburetor out of adjustment.
3.
See Engine Service Dealer.
4.
Stale gasoline.
4.
Replace with fresh gasoline.
5.
Dirt or water in fuel tank.
5.
See Engine Service Dealer.
6.
Engine cooling system clogged.
6.
Clean air cooling system (see Engine Owner’s Manual).
1.
Engine cooling system clogged.
1.
Clean air cooling area (see Engine Owner’s Manual).
2.
Carburetor out of adjustment.
2.
See Engine Service Dealer.
3.
Oil level is low.
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).
2.
See “Checking Drive Belt Tension,” Section 5.
3.
Internal transmission wear or damage.
3.
Contact local dealer or the factory.
4.
Bolt loose in transmission pulley.
4.
Tighten bolt.
1.
Wheel Drive Pins not in WHEEL DRIVE.
1.
See “Wheel Drive Pins” in Section 3.
2.
Bolt loose in transmission pulley.
2.
Tighten bolt.
3.
Internal transmission wear or damage.
3.
Contact local Dealer or the Factory.
1.
Tine holder mounting hardware missing.
1.
Replace hardware.
2.
Bolt loose in transmission pulley.
2.
Tighten bolt.
3.
Internal transmission wear or damage.
3.
Contact local Dealer or the Factory.
1.
Worn tines.
1.
See “Bolo Tines” (Section 5).
2.
Improper Depth Regulator setting.
2.
See “Tilling Tips & Techniques,” Section 4.
3.
Incorrect throttle setting.
3.
See Section 4.
4.
Forward Drive Belt slipping.
4.
See “Checking Forward Drive Belt Tension,” Section 5.
Engine runs poorly.
Engine overheats.
Tines turn, but wheels don’t.
Wheels Turn, but Tines Don’t.
Poor tilling performance.
22
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 normally replaced through periodic maintenance.
Charges for pick-up, delivery, and service calls are not covered by this warranty.
Service completed by someone other than an authorized service dealer is not covered by this
warranty.
Parts that are not genuine Troy-Bilt LLC service parts are not covered by this warranty.
The engine is warranted separately by the engine manufacturer. Refer to the engine
manufacturer’s warranty for terms and conditions.
LIMITED
COMMERCIAL
USE WARRANTY
If used for commercial, institutional, industrial, rental, or demonstrator purposes, the warranty
on the tiller is limited in duration to 90 days from the date of purchase.
This warranty does not apply to parts that have been damaged by accident, alteration, misuse,
abuse, neglect, improper maintenance, vandalism, theft, fire, water, or damage because of
peril or other natural disaster.
HOW TO OBTAIN
SERVICE
Warranty service is available, with proof of purchase, through your local authorized service
dealer. To locate a dealer in your area, consult your Yellow Pages, or contact Troy-Bilt LLC at
P.O. Box 361131, Cleveland, Ohio 44136-0019, 1-800-520-5520, or log on to our Web site at
www.troybilt.com.
The provisions set forth in this warranty provide the sole and exclusive remedy arising from the sale. Troy-Bilt LLC shall
not be liable for any incidental or consequential damage or expense of any kind, including but not limited to cost of
equipment rental, loss of profits, or costs of hiring services to perform tasks normally performed by the equipment.
Any implied warranties, including any implied warranty of merchantability or fitness for a particular purpose, shall be limited
in duration to the period of ownership by the original purchaser (and a maximum of 90 days from the date of sale if the tiller is
purchased for commercial or other non-residential use).
Some states do not allow the exclusion or limitation of incidental or consequential damages, or limitations on how long an
implied warranty lasts, so the above exclusions or limitations may not apply to you.
This limited warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
For customer assistance, contact your nearest authorized dealer, or contact us at:
TROY-BILT LLC, P.O. Box 361131, Cleveland, Ohio 44136-0019, 1-800-520-5520