Troy Bilt Tiller 630C Tuffy 634F Bronco 634A Super Bronco User 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, 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 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.f
11/19/03  
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SECTION 1: SAFETY  
This machine meets voluntary safety stan-  
dard 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 634F634A)  
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  
Standard-Rotating-Tines  
(SRT)  
Wheel Drive Pin  
Figure 1-1: Tiller features and controls. See separate Engine Owner’s Manual to  
identify engine controls.  
personal injury or property damage.  
3. Do not operate the tiller without wearing  
adequate outer garments. Avoid loose gar-  
ments or jewelry that could get caught in  
moving parts.  
e. Replace all fuel tank and container  
caps securely.  
Training  
1. Carefully read this Own-  
er’s Manual, the separate  
f. If fuel is spilled, do not attempt to  
start the engine, but move the ma-  
chine away from the area of spillage  
and avoid creating any source of ig-  
nition until fuel vapors have dissi-  
pated.  
Engine Owner’s Manual,  
4. Do not operate the tiller when barefoot  
or wearing sandals, sneakers, or light foot-  
wear. Wear protective footwear that will  
improve footing on slippery surfaces.  
and any other literature you may receive.  
Be thoroughly familiar with the controls  
and the proper use of the tiller and its en-  
gine. Know how to stop the unit and disen-  
gage the controls quickly.  
5. Do not till near underground electric ca- 7. Never make adjustments when engine is  
bles, telephone lines, pipes or hoses. If in  
doubt, contact your telephone or utility  
company.  
running (unless recommended by manu-  
facturer).  
2. Never allow children to operate the tiller.  
Never allow adults to operate the tiller  
without proper instruction.  
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.  
6. Warning: Handle fuel with care; it is  
highly flammable and its vapors are explo-  
sive. Take the following precautions:  
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 oc-  
curring to other people, their property, and  
themselves.  
a. Store fuel in containers specifically  
designed for this purpose.  
b. The gas cap shall never be removed or  
fueladdedwhiletheengine isrunning.  
Allow the engine to cool for several  
minutes before adding fuel.  
c. Keep matches, cigarettes, cigars,  
pipes, open flames and sparks away  
from the fuel tank and fuel container.  
d. Fill fuel tank outdoors with extreme  
care. Never fill fuel tank indoors. Use  
a funnel or spout to prevent spillage.  
Preparation  
1. Thoroughly inspect the area where the  
tiller is to be used and remove all foreign  
objects.  
3. After striking a foreign object, stop the  
engine, remove the wire from the spark  
plug wire and prevent it from touching the  
spark plug. Thoroughly inspect the ma-  
chine for any damage and repair the dam-  
age before restarting and operating the  
machine.  
2. Be sure all tiller controls are released  
and both wheels are in the Wheel Drive po-  
sition before starting the engine.  
3
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4. Exercise caution to avoid slipping or fall- If in doubt about the tilling conditions, al- 24. Do not touch engine parts which may  
ing.  
ways use the following operating precau- be hot from operation. Let parts cool down  
tions to assist you in maintaining control sufficiently.  
5. If the unit should start to vibrate abnor-  
mally, stop the engine, disconnect the  
spark plug wire and prevent it from touch-  
ing the spark plug, and check immediately  
for the cause. Vibration is generally a  
warning of trouble.  
of the tiller:  
a. Walk behind and to one side of the  
25. Please remember: You can always stop  
the tines and wheels by releasing the For-  
ward Clutch Bail or on Models 634F and  
634A the Reverse Clutch control, (which-  
ever control is engaged), or by moving the  
ignition switch andor throttle control lever  
on the engine to “OFF” or “STOP”.  
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.  
6. Stop the engine, disconnect the spark  
plug wire and prevent it from touching the  
spark plug, whenever you leave the oper-  
ating position, before unclogging the tines,  
or when making any repairs, adjustments  
or inspections.  
26. To load or unload the tiller, see the in-  
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.  
structions in Section 4 of this Manual.  
27. Use extreme caution when reversing  
or pulling the machine towards you.  
7. Take all possible precautions when leav-  
ing the machine unattended. Stop the en-  
gine. Disconnect the spark plug wire and  
move it away from the spark plug. Be sure  
that both wheels are in the Wheel Drive po-  
sition.  
28. Start the engine carefully according to  
instructions and with feet well away from  
the tines.  
29. Never pick up or carry a machine while  
the engine is running.  
8. Before cleaning, repairing, or inspect-  
ing, 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 acci-  
dental starting.  
Maintenance and Storage  
g. In an emergency, stop the tines and 1. Keep the tiller, attachments and acces-  
wheels by releasing whichever  
clutch control is engaged. Do not  
attempt to restrain the tiller.  
sories 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.  
15. Do not overload the tiller’s capacity by  
attempting to till too deeply at too fast a  
rate.  
9. The flap on the tine hood must be down  
when operating the tiller.  
3. Never store the tiller with fuel in the fuel  
tank inside a building where ignition sourc-  
es 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 enclo-  
sure.  
10. Never use the tiller unless proper  
guards, plates, or other safety protective  
devices are in place.  
16. Never operate the tiller at high trans-  
port speeds on hard or slippery surfaces.  
Look behind and use care when backing  
up.  
11. Do not run the engine in an enclosed  
area. Engine exhaust contains carbon  
monoxide gas, a deadly poison that is  
odorless, colorless, and tasteless.  
17. Do not operate the tiller on a slope that  
is too steep for safety. When on slopes,  
slow down and make sure you have good  
footing. Never permit the tiller to free-  
wheel down slopes.  
4. To reduce the chances of a fire hazard,  
keep the engine free of grass, leaves, or ex-  
cessive grease.  
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 rapid-  
ly, 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  
5. Store gasoline in a cool, well-ventilated  
area, safely away from any spark- or  
flame-producing equipment. Store gaso-  
line in an approved container, safely away  
from the reach of children.  
18. Never allow bystanders near the unit.  
19. Only use attachments and accessories  
that are approved by the manufacturer of  
the tiller.  
6. Refed to the Maintenance sections of  
this Manual and the separate Engine Own-  
er’s Manual for instructions if the unit is to  
be stored for an extended period.  
20. Use tiller attachments and accessories  
when recommended.  
21. Never operate the tiller without good  
visibility or light.  
tineswheels with the Forward Clutch Bail  
(all models) or the Reverse Clutch control  
(Models 634F634A only).  
7. Never perform maintenance while the  
engine is running or the spark plug wire is  
connected, except when specifically in-  
structed to do so.  
22. Never operate the tiller if you are tired;  
or under the influence of alcohol, drugs or  
medication.  
14. Be aware that the tiller may unex-  
pectedly bounce upward or jump forward  
if the tines should strike extremely hard  
packed soil, frozen ground, or buried ob-  
stacles like large stones, roots, or  
stumps.  
23. Operators shall not tamper with the en-  
gine-governor settings on the machine;  
the governor controls the maximum safe  
operating speed to protect the engine and  
all moving parts from damage caused by  
overspeed. Authorized service shall be  
sought if a problem exists.  
8. If the fuel tank has to be drained, do this  
outdoors.  
4
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Decals  
Reverse Clutch Control  
Operating Instruction  
(Models 634F/634A)  
Forward Clutch Bail  
For your safety and the safety of others, vari-  
ous 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.  
Starting Stabilization  
Message (on engine)  
Warning Messages  
Refer to the Parts List pages in this Manual for  
decal locations, descriptions and part num-  
bers.  
Hot Surfaces Warning  
Figure 1-2: Location of safety and operating decals.  
Operating Symbols  
Varioussymbols(shownhere, withworddescriptions)  
may be usedon the tiller and engine.  
R
CHOKE  
ON  
CHOKE  
OFF  
REVERSE  
ROTATING TINES  
NOTE: Your unit may not have all of the symbols.  
BAIL  
BAIL  
ENGAGED  
DISENGAGED  
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 UN-  
CLOGGING 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
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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.  
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 ship-  
ping platform until instructed to do so in  
these Assembly steps.  
1
2
INTRODUCTION  
2. Remove any packaging material from  
the carton. Remove any staples from the  
bottom of the carton and remove the car-  
ton from the shipping platform.  
Carefully follow these assembly steps to  
correctly prepare your tiller for use. It is  
recommended that you read this Section  
in its entirety before beginning assembly.  
3. Remove all unassembled parts and the  
separate hardware bag from the carton.  
Check that you have the items listed in the  
Loose Parts List (contact your local dealer  
or the factory items are missing or dam-  
aged).  
NOTE: 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.  
Figure 2-1: To identify length of screws, place  
screw on template as shown and measure dis-  
tance 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.  
NOTE: Use the screw length template  
(Fig. 2-1) to identify screws.  
INSPECT UNIT  
Inspect the unit and carton for damage im-  
mediately after delivery. Contact the carri-  
er (trucking company) if you find or  
suspect damage. Inform them of the dam-  
age and request instructions for filing a  
claim. To protect your rights, put your  
claim in writing and mail a copy to the car-  
rier within 15 days after the unit has been  
delivered. Contact Troy-Bilt LLC if you  
need assistance in this matter.  
Loose Parts List  
3. There are three height adjustment holes  
in the two handlebar support brackets (E  
and F, Fig. 2-2). Use a setting that will po-  
sition 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.  
Qty.  
1
1
Description  
Handlebar Support (see A, Fig. 2-2)  
Handlebar Assembly (see K, Fig. 2-2)  
Hardware bag contents:  
Hex hd. screw, 5/16-18 x 1-1/2"  
Hex hd. screw, 3/8-16 x 3/4"  
Flat Washer, 3/8"  
4
2
2
4
4
2
Split lockwasher, 5/16"  
Hex nut, 5/16"-18  
Hex locknut, 38"-16  
TOOLS / MATERIALS NEEDED  
(2) 1/2” open-end wrench*  
(2) 9/16" open-end wrench*  
(1) 3/8" open-end wrench*  
(1) 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)  
*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.  
IMPORTANT: The support brackets must  
be assembled to the outside of the  
handlebar assembly.  
4. Tighten all handlebar mounting hard-  
ware securely.  
NOTE: LEFT and RIGHT sides of the tiller  
are as viewed from the operator’s position  
behind the handlebars.  
STEP 3: MOVE TILLER OFF CRATE  
To roll the tiller off the shipping platform,  
put the wheels in freewheel, as follows:  
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).  
1. Place a sturdy block under the transmis-  
sion to raise one wheel about 1" off the  
ground.  
(1) Clean oil funnel  
(1) Motor oil. Refer to the Engine Owner’s  
Manual for oil specifications and  
quantity required.  
2. Remove the hairpin cotter (L, Fig. 2-3)  
and wheel drive pin (M) from the wheel  
hub (O) and wheel shaft (N).  
* Adjustable wrenches may be used.  
6
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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 ca-  
ble (cable without an attached knob) from  
its shipping position and slide the thin ca-  
ble wire (T, Fig. 2-4) into the slot in the ca-  
ble 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 ad-  
juster (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  
U
described in Wheel Drive Pins in Section 3.  
Fig. 2-4: Installing forward clutch cable bracket and cable.  
7
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4. 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.  
Z
X
b. Squeeze the Forward Clutch Bail against  
the handlebar (see Fig. 2-7) and re-mea-  
sure the spring length. The belt tension is  
correct if this second measurement is be-  
tween 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.  
Hold bail against handlebar while  
taking second measurement of spring  
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 Neu-  
tral (cable tension too tight).  
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 po-  
sition and route it up to the handlebar. Be  
BB  
sure that the cable is routed beneath the  
Forward Clutch Bail.  
Y
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)  
W
DD  
CC  
up the cable and tighten it securely.  
W
Flat Side  
V
3. Fasten the reverse clutch cable to the  
Z
left side handlebar with a cable tie (EE, Fig.  
2-9).  
Fig. 2-8: Install reverse cable bracket and  
reverse clutch cable.  
X
4. Test the function of the reverse clutch by  
pulling out and releasing the cable knob.  
The knob should return to its neutral posi-  
tion (resting against bracket). If it doesn’t,  
contact your local dealer or Troy-Bilt LLC  
for technical assistance.  
CC  
Fig. 2-5: Cable Fig. 2-6: Attach forward  
spring and  
adjuster.  
clutch cable spring to  
forward clutch bail.  
EE  
Fig. 2-9: Route reverse clutch cable (CC) as  
shown. Attach with cable tie (EE).  
8
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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.  
STEP 7: ADD MOTOR OIL  
The tiller is shipped without oil in the en-  
gine.  
STEP 8: CHECK HARDWARE  
Check all nuts and screws for tightness.  
STEP 9: CHECK AIR PRESSURE IN  
TIRES (units with pneumatic tires)  
IMPORTANT: Do not start the engine with-  
out first adding motor oil. Severe engine  
damage will result if the engine is run with-  
out oil.  
Check the air pressure with a tire gauge.  
Deflate or inflate the tires equally to be-  
tween 15 PSI and 20 PSI (pounds per  
square inch). Be sure that both tires are in-  
flated equally or the unit will pull to one  
side.  
IMPORTANT: Do not operate the tiller if the  
gear oil level is low. Doing so will result in 1. Refer to the separate Engine Owner’s  
severe damage to the transmission com-  
ponents.  
1. With the tiller on level ground, pull the 2. With the tiller on level ground, move the  
Manual for engine oil specifications and  
capacities.  
Depth Regulator Lever (FF, Fig. 2-10) back Depth Regulator Lever (FF, Fig. 2-10) up or  
and then all the way up until the lowest  
notch in the lever is engaged.  
down until the engine is level.  
3. Add motor oil as described in the En-  
2. Remove the oil fill plug (GG, Fig. 2-11) gine Owner’s Manual.  
from the transmission housing cover and  
locate the main drive shaft situated inside  
the housing.  
4. Move the Depth Regulator Lever all the  
way down until the highest notch is en-  
gaged. This places the tines in the “travel”  
position, which allows the tiller to be  
3. The gear oil level is correct if the gear  
oil is approximately halfway up the side of moved without the tines touching the  
the main drive shaft.  
ground.  
4. If the oil level is low, add gear oil by re-  
ferring to A. To Check the Transmission  
Gear Oil Level in Section 5.  
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
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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  
Forward Clutch Bail  
Reverse Clutch Control  
(Models 634F/634A)  
instructions can result in  
serious personal injury.  
Depth Regulator  
INTRODUCTION  
Handlebar Height Adjustment  
This Section describes the location and  
function of the controls on your tiller. Re-  
fer to the following Section, Operation for  
detailed operating instructions.  
Practice using these controls, with the en-  
gine shut off, until you understand the op-  
eration of the controls and feel confident  
with each of them.  
Wheel Drive Pin  
(on each wheel)  
Figure 3-1: Tiller features and controls. See seperate Engine Owner’s Manual to identify  
engine controls.  
ENGINE CONTROLS  
Refer to the engine manufacturer’s Engine  
Owner’s Manual (included in the tiller liter-  
ature package) to identify the controls on  
your engine.  
Forward Clutch Bail (all models) or the Re-  
verse Clutch Control (Models 634F and  
634A) is engaged.  
A
IMPORTANT: The control for stopping the  
engine is located on the engine.  
Use the FREEWHEEL mode only when the  
engine is not running. In FREEWHEEL, the  
wheel drive pins are placed only through  
the holes in the wheel shaft (not the wheel  
hubs), thus allowing the wheels to turn  
freely when you manually move the tiller.  
D
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.  
B
To place the wheels in WHEEL DRIVE or  
FREEWHEEL:  
C
1. Stop engine, disconnect spark plug wire  
from spark plug and allow engine to cool.  
Figure 3-2: WHEEL DRIVE position.  
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.  
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 hair-  
pin 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.  
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.  
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.  
2. Raise one wheel about one inch off the  
ground and place a sturdy support under  
the transmission.  
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  
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  
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begin tilling at a very shallow depth setting  
and gradually increase the tilling depth.  
WARNING: Use extreme  
caution when reversing or  
pulling the machine towards  
you. Look behind to avoid  
obstacles.  
Never attempt to till in reverse.  
Failure to follow this warning  
could result in personal injury  
or property damage.  
A
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.  
D
B
C
To operate the Reverse Clutch Control:  
1. Put wheels in WHEEL DRIVE position  
(see “WARNING” statement at the left).  
Failure to follow this warning  
could result in personal injury  
or property damage.  
2. Stop all tiller motion by releasing the  
Forward Clutch Bail.  
Figure 3-3: FREEWHEEL position.  
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.  
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.  
Travel Position  
G
Shallow  
Settings  
Deep  
4. Release the control knob to disengage  
(stop) the wheels and tines (the engine will  
continue to run).  
Settings  
Figure 3-5: Depth Regulator Lever (G).  
HANDLEBAR HEIGHT ADJUSTMENT  
The handlebar height is adjustable to three  
different settings (Figure 3-6). In general,  
adjust the handlebars so they are at waist  
level when the tines are 3"-4" in the soil.  
FORWARD CLUTCH BAIL  
The Forward Clutch Bail (E, Figure 3-4)  
controls the engagement of forward drive  
to the wheels and tines.  
F
To adjust the handlebars:  
E
To operate the Forward Clutch Bail:  
1. Stop engine, disconnect spark plug  
wire from spark plug and allow engine to  
cool.  
Figure 3-4: All models have a Forward Clutch  
Bail (E). Only Models 634F/634A have a Re-  
verse Clutch Control (F).  
1. Put wheels in WHEEL DRIVE position  
(see “WARNING” statement above).  
2. Remove hardware, reposition handle-  
bars, and reinstall hardware securely.  
2. Lift and hold the clutch bail (E, Figure 3-  
4) against the handlebar to start the wheels  
and tines rotating in a forward direction.  
DEPTH REGULATOR LEVER  
This lever (G, Figure 3-5) controls the till-  
ing depth of the tines. Pull the lever back  
and slide it up or down to engage the  
notched height settings.  
3. Release the clutch bail to disengage  
(stop) the wheels and tines (the engine will  
continue to run).  
High  
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.  
REVERSE CLUTCH CONTROL  
(Models 634F/634A only)  
Medium  
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.  
Low  
Moving the lever upward will increase the  
tilling depth. The lowest notch allows a till-  
ing depth of approximately 6”, depending  
on soil conditions. For best results, always  
Figure 3-6: Handlebar height adjustment.  
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SECTION 4: OPERATION  
1. Complete the Pre-Start Checklist on  
this page.  
2. Put the wheels in the WHEEL DRIVE po-  
sition (see Wheel Drive Pins in Section 3 of  
this manual).  
WARNING: Before  
Reverse Clutch Control  
(Models 634F/634A)  
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.  
WARNING: To help  
prevent serious personal injury  
or damage to equipment:  
Forward  
Clutch Bail  
Depth Regulator  
Wheel Drive Pin  
Failure to follow these  
instructions can result in  
serious personal injury.  
• Before starting engine, put both  
wheels in the WHEEL DRIVE position.  
Never have wheels in FREEWHEEL po-  
sition 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  
INTRODUCTION  
Read this Operation Section and the sepa-  
rate Engine Owner’s Manual before you  
start the engine. Then, take the time to fa-  
miliarize 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 engag-  
ing the soil (put tines in “travel” setting).  
Only after you’ve become completely fa-  
miliar with the tiller should you begin using  
it in the garden.  
Fig. 4-1  
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 en-  
closed, poorly ventilated areas. Engine  
exhaust contains carbon monoxide, an  
odorless and deadly gas.  
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.  
BREAK-IN OPERATION  
• Avoid engine muffler and nearby areas.  
Temperatures in these areas may ex-  
ceed 150° F.  
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.  
3. Move the Depth Regulator Lever all the  
way down to the “travel” position, so that  
the tines clear the ground.  
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.  
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 con-  
trol lever located on engine in the “ON”,  
“RUN”, “FAST” or “START” position, as in-  
structed in the Engine Owner’s Manual.  
STARTING AND STOPPING  
Pre-Start Checklist  
8. Attach spark plug wire to spark plug.  
Starting the Engine  
With the spark plug wire disconnected  
from the spark plug, perform the following  
checks and services before each use:  
1. Read the Safety and Controls Sections  
in this manual. Read the separate Engine  
Owner’s Manual provided with the unit.  
2. Put the wheels in the WHEEL DRIVE  
position (wheel pins must be through  
holes in wheel hubs and wheel shaft).  
3. Check unit for loose or missing hard-  
ware. Service as required.  
The following steps describe how to start  
and stop the engine.  
7. Choke or prime engine, as instructed in  
Engine Owner’s Manual.  
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:  
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.  
Features and Controls.  
4. Check engine oil level. See Engine  
Owner’s Manual.  
9. Use the “FAST” throttle speed setting  
when tilling.  
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4. For forward motion of the wheels and  
tines:  
(a) Pull Forward Clutch Bail (Fig. 4-1) up  
(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  
against handlebar. Release bail to stop for- wheel “steps” backward. Repeat as needed.  
ward motion of wheels and tines.  
(c) If longer distances need to be covered  
in reverse, shut off the engine, then place  
the two wheels in FREEWHEEL.  
(b) When tilling, relax and let the wheels  
pull the unit while the tines dig. Walk be-  
hind 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 caus-  
es the tines to try and propel the tiller.  
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.  
Stopping the Engine and Tiller  
1. To stop the wheels and tines, release the  
Forward Clutch Bail (all models) or the Re-  
verse 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.  
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.  
OPERATING THE TILLER  
The following operating instructions pro-  
vide guidelines to using your tiller effec-  
tively and safely. Be sure to read Tilling  
Tips & Techniques in this Section before  
actually putting the tines into the soil.  
NOTE: This is a traditional “Standard-Ro-  
tating-Tine” (SRT) tiller with forward ro-  
tating tines. It operates completely  
differently from “Counter-Rotating-Tine”  
(CRT) tillers or from front-tine tillers.  
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.  
Fig. 4-4: To begin turn, lift handlebars until  
tines are out of ground and unit is balanced.  
1. Follow the Pre-Start Checklist at the  
beginning of this Section. Be sure that the (b) Stop all forward motion. Lift handle-  
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).  
bar with one hand until tines are off the  
ground and then pull Reverse Clutch Con-  
trol knob out (see Fig. 4-3). To stop revers-  
ing, let go of Reverse Clutch Control knob.  
3. Start engine and allow it to warm up.  
Then put throttle in “FAST” setting.  
Fig. 4-5: With tines out of ground, push han-  
dlebars sideways to turn tiller.  
Fig. 4-3: Raise tines off ground and look  
behind when moving in reverse.  
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 andor the throttle control lever in  
the “OFF” or “STOP” position.  
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.  
Fig. 4-2: Use one hand to guide tiller when  
moving forward.  
13  
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TILLING TIPS & TECHNIQUES  
• 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.)  
Tilling Depths  
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.)  
With experience, you will find the “just right” tilling depth and tilling speed combination  
that is best for your garden.  
Choosing Correct Wheel & Tine Speeds  
Set the engine throttle lever at a speed to give the engine adequate power and yet allow it to operate at the slowest possible speed...at least  
until you have achieved the maximum tilling depth you desire. Faster engine speeds may be desirable when making final passes through  
the seedbed or when cultivating. Selection of the correct engine speed, in relation to the tilling depth, will ensure a sufficient power level to  
do the job without causing the engine to labor.  
Let the Tiller Do the Work  
Avoid Making Footprints  
Avoid Tilling Soggy, Wet Soil  
While tilling, relax and let the wheels pull the  
Whenever possible, walk on the untilled  
Tilling wet soil often results in large, hard  
tiller along while the tines do the digging. side of the unit to avoid making footprints in clumps of soil that can interfere with plant-  
Walk on the side that is not yet finished (to your freshly tilled or cultivated soil. Foot- ing. If time permits, wait a day or two after  
avoid making footprints in the freshly tilled prints cause soil compaction that can ham- heavy rains to allow the soil to dry before  
soil) and lightly, but securely grip the han- per root penetration and contribute to soil tilling. Test soil by squeezing it into a ball. If  
dlebar with just one hand.  
erosion. They can also “plant” unwanted it compresses too easily, it is too wet to till.  
weed seeds back into the freshly tilled  
ground.  
Preparing Seedbeds  
• When preparing a seedbed, go over the same path twice in the first row, then  
overlap one-half the tiller width on the rest of the passes (see Fig. 6). When fin-  
ished 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 over-  
lap the first passes by one-half a tiller  
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.  
width, followed by successive passes  
at one-quarter width (see Fig. 4-8).  
1
2
3
Fig. 4-8  
Fig. 4-9  
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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 de-  
compose during the non-growing season and add important natural 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.  
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 set-  
ting 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 re-  
turn a few days later to finish off any remaining stubble.  
Failure to follow this warning  
could result in personal injury.  
After tilling under crop residues, add more organic matter such as leaves, grass clippings and  
even kitchen scraps. When tilled into the soil, this organic matter will decompose and add  
even more important nutrients to the soil.  
After power composting, you may want to plant a “green manure” cover crop to protect the soil during the off-season. You simply grow a  
crop of clover, alfalfa, buckwheat, peas, beans, rye grass, grain, or kale and then till it into the soil prior to the planting season.  
Tilling On Slopes  
Read the following recommendations before tilling on slopes:  
WARNING: Do not  
If you must garden on a moderate slope, please follow two very important guidelines:  
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.  
1. Till only on moderate slopes, never on steep ground where footing is difficult (review safe-  
ty 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!  
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  
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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 pre-  
paring. For added stability of the tiller, always keep the uphill wheel in the soft, new-  
ly 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  
• It may be necessary to remove the debris by hand  
(a pocket knife will help you to cut away the mate-  
rial). Be sure to stop the engine and disconnect the  
spark plug wire before clearing the tines by hand.  
The tines have a self-clearing action which eliminates most tangling of debris in  
the tines. However, occasionally dry grass, stringy stalks or tough vines may be-  
come 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.  
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.  
• Use sturdy ramps and manually (engine tiller ahead of you. Have a person at each  
LOADING AND UNLOADING  
THE TILLER  
shut off) roll the tiller into and out of the  
vehicle. Two or more people are needed to  
do this.  
side to turn the wheels.  
• When going down ramps, walk back-  
ward with the tiller following you. Keep  
alert for any obstacles behind you. Posi-  
tion a person at each wheel to control the  
speed of the tiller. Never go down ramps  
WARNING: Loading and  
unloading the tiller into a  
• The ramps must be strong enough to  
vehicle is potentially hazardous support the combined weight of the tiller  
and we don’t recommend doing and any handlers. The ramps should pro-  
so unless absolutely necessary, vide good traction to prevent slipping; they tiller-first, as the tiller could tip forward.  
as this could result in personal  
injury or property damage.  
However, if you must load or  
unload the tiller, follow the  
guidelines given next.  
should have side rails to guide the tiller  
along the ramps; and they should have a  
locking device to secure them to the  
vehicle.  
• 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  
• The handlers should wear sturdy footwear in place on the ramps (if necessary), and to  
that will help to prevent slipping.  
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.  
• Before loading or unloading, stop the en-  
gine, 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.  
• 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  
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SECTION 5: MAINTENANCE  
If a cover is leaking, check for loose  
screws. If the screws are tight, a new  
gasket or oil seal may be required.  
WARNING: Before  
TILLER LUBRICATION  
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.  
After every 10 operating hours, oil or  
grease the lubrication points shown in  
Figure 5-1 and described below.  
If the leak is from around a shaft and oil  
seal, the oil seal probably needs to be  
replaced. See your authorized dealer or  
contact the factory for service or advice.  
Use clean lubricating oil (#30 weight motor  
oil is suitable) and clean general purpose  
grease (grease containing a metal lubricant  
is preferred, if available).  
IMPORTANT: Never operate the tiller if  
the transmission is low on oil. Check  
the oil level after every 30 hours of  
operation and whenever there is any oil  
leakage.  
Failure to follow these  
• Remove the wheels, clean the wheel shaft  
(A, Fig. 5-1) and apply a thin coating of  
grease to the wheel shaft.  
instructions can result in serious  
personal injury or property  
damage.  
• Grease the back, front and sides of the  
depth regulator lever (B, Fig. 5-1).  
CHECK HARDWARE  
MAINTENANCE SCHEDULE  
Check for loose or missing hardware af-  
ter every 10 operating hours and tighten  
or replace (as needed) before reusing  
tiller  
• Remove the tines and clean the tine shaft  
(C, Fig. 5-1). Use a file or sandpaper to  
gently remove any rust, burrs or rough  
spots (especially around holes in shaft).  
Apply grease to ends of shaft before install-  
ing tines.  
PROCEDURE  
Check motor oil level  
NOTES  
2, 3  
Clean engine  
2, 7  
1, 4  
1, 4  
4, 6, 9  
4
Be sure to check the screws underneath  
the tiller hood that secure the transmis-  
sion cover and the Depth Regulator Lever  
to the transmission.  
Check drive belt tension  
Check nuts and bolts  
Change motor oil  
• Oil the threads on the handlebar height  
adjustment screws and the handlebar  
attaching screws (D, Fig. 5-1).  
Lubricate tiller  
CHECK TIRE PRESSURE  
(Models with pneumatic tires)  
Service engine air cleaner system  
7
Check gear oil level in transmission 1, 5  
Check the air pressure in both tires. The  
air pressure should be between 15 PSI  
and 20 PSI (pounds per square inch).  
Check tines for wear  
5
5
Check air pressure in tires  
(if unit has pneumatic tires)  
D
B
Keep both tires equally inflated to help  
prevent machine from pulling to one  
side.  
Service spark plug  
7
NOTES  
1 - Check after first 2 hours of break-in operation.  
2 - Before each use.  
TRANSMISSION  
GEAR OIL SERVICE  
Check the transmission gear oil level  
after every 30 hours of operation or  
whenever you notice any oil leak. Oper-  
ating the tiller when the transmission is  
low on oil can result in severe damage.  
3 - Every 5 operating hours.  
4 - Every 10 operating hours.  
5 - Every 30 operating hours.  
6 - Change more frequently in dusty conditions.  
7 - See Engine Owner’s Manual for service  
recommedations.  
8 - Whichever time interval occurs first.  
9 - Change after first 2 hours of break-in  
C
A
A. To Check the Transmission  
Gear Oil Level:  
Figure 5-1  
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 incor-  
rect oil level reading.  
2. With the tiller on level ground, pull the  
Depth Regulator Lever all the way up.  
CHECK FOR OIL LEAKS  
Before each use, check the tiller for signs of  
an oil leak — usually a dirty, oily accumu-  
lation 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. How-  
ever, if the oil drips overnight, then imme-  
diate attention is needed. Ignoring an oil  
leak can result in severe transmission  
damage!  
3. Remove the oil fill plug (A, Fig. 5-2)  
from the transmission housing and look  
inside the oil fill hole to locate the main  
drive shaft situated below the hole.  
17  
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WARNING: Before inspecting, cleaning or servicing the machine, shut off engine, wait for all  
moving parts to come to a complete stop, disconnect spark plug wire and move wire away from  
spark plug. Failure to follow these instructions can result in serious personal injury or property  
damage.  
4. The gear oil level is correct if the gear  
oil is approximately halfway up the side of  
the main drive shaft.  
B. To Drain the Transmission Gear Oil:  
BOLO TINES  
The transmission gear oil does not need to  
be changed unless it has been contaminat-  
ed with dirt, sand or metal particles.  
1. Drain gasoline from the fuel tank or run  
the engine until the fuel tank is empty. See  
“DANGER” statement below.  
The bolo tines will wear with use and  
should be inspected at the beginning of  
each tilling season and after every 30 oper-  
ating hours. The tines can be replaced ei-  
ther individually or as a complete set. See  
the Parts List pages for tine identification  
and part numbers.  
5. If the gear oil level is low, add gear oil  
as described next. If the gear oil level is  
okay, securely replace the oil fill plug.  
IMPORTANT: Do not operate the tiller if the  
gear oil level is low. Doing so will result in  
severe damage to the transmission com-  
ponents.  
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.  
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 re-  
duced effectiveness when chopping up  
and turning under organic matter.  
• Allow the engine and muffler to cool  
B
for at least two minutes before drain- B. RemovingInstalling a Single Tine:  
ing the tiller’s gasoline tank.  
1. With the engine shut off and the spark  
• Do not allow open flames, sparks, plug wire disconnected, remove the two  
B
A
matches or smoking in the area.  
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.  
• 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 2. When installing a single tine, be sure to  
children.  
position it so that its cutting edge (sharp)  
will enter the soil first as the tiller moves  
forward.  
Figure 5-2: Remove oil fill plug (A) to check  
gear oil level and to add gear oil. Remove  
four cover screws (B) to drain gear oil.  
• Do not store gasoline in an area where  
its vapors could reach an open flame  
or spark, or where ignition sources are  
present (such as hot water and space  
heaters, furnaces, clothes dryers,  
stoves, electric motors, etc.)  
C. RemovingInstalling a Tine Assembly:  
1. A tine assembly consists of eight tines  
mounted on a tine holder.  
6. If adding only a few ounces of gear oil,  
use API rated GL-4 or GL-5 gear oil having  
a viscosity of SAE 140, SAE 85W-140 or  
SAE 80W-90. If refilling an empty trans-  
mission, use only GL-4 gear oil having a  
viscosity of SAE 85W-140 or SAE 140.  
2. If removing both tine assemblies, mark  
them “left” and “right” before removal.  
Remove the screw (C, Figure 5-3), lock  
washer (E) and locknut (D) that secure the  
tine assembly to the tine shaft. If neces-  
sary, use a rubber mallet to tap the tine as-  
sembly outward off the shaft.  
2. Drain the oil from the engine.  
3. Remove four screws (B, Figure 5-2) and  
remove transmission cover and gasket.  
4. Remove the left-side wheel.  
IMPORTANT: Do not use automatic trans-  
mission fluid or motor oil in the transmis-  
sion.  
5. Tilt the left-side wheel shaft into a drain  
pan and allow the gear oil to drain through 3. Before reinstalling the tine assembly, in-  
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.  
the top of the transmission.  
6. Reinstall the wheel.  
7. Install a new gasket (do not reuse old  
gasket) and reinstall the transmission cov-  
er.  
spect the tine shaft for rust, rough spots or  
burrs. Lightly file or sand, as needed. Ap-  
ply a thin coat of grease to the shaft.  
4. Install each tine assembly so that the  
8. Securely replace the oil fill plug.  
cutting (sharp) edge of the tines will enter  
8. Refill the transmission using GL-4 gear the soil first when the tiller moves forward.  
oil (SAE 85W-140 or SAE 140).  
9. Refill the engine with motor oil and re-  
plenish the fuel tank with gasoline.  
Secure the tine assembly to the tine shaft  
using the screw and locknut  
18  
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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 lo-  
cated inside the spring clockwise (viewed  
from operator’s position) to increase ten-  
sion on the spring. Turn the screw coun-  
D
terclockwise to decrease tension. Once  
adjusted, reattach the spring to the For-  
ward Clutch Bail.  
C
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).  
A
E
B
Replacement Belt Information  
Figure 5-3: Install tines so that cutting edge of tines enter soil first when tiller moves forward.  
If the drive belt needs to be replaced, see  
your local authorized dealer or refer to the  
Parts List for ordering information. Use  
only a factory-authorized belt as an “over-  
the-counter” belt may not perform satis-  
factorily. The procedure requires average  
mechanical ability and commonly available  
tools.  
belt tension is correct if this second mea-  
surement is between 1/6" -to- 3/16" longer  
than the first measurement.  
CHECKING AND ADJUSTING  
FORWARD DRIVE BELT TENSION  
It is important to maintain correct tension  
on the forward drive belt. A loose belt will  
cause the tines and wheels to slow down —  
or stop completely — even though the en-  
gine is running at full speed. A too tight  
belt can result in unintentional tine move-  
ment when the clutch bail is in the Neutral  
(released) position.  
4. If the spring is too short (less than  
1/16"), the tension is too loose. If the  
spring is too long (more than 3/16"), the  
tension is too tight.  
5. To adjust the length of the spring:  
a. Release the Forward Clutch Bail.  
• Check belt tension after the first two  
hours of break-in operation and after every  
10 operating hours.  
• At the end of each tilling season, check  
the belt for cracks, cuts or frayed edges  
and replace it as soon as possible.  
A
C
B
To Check Forward Belt Tension:  
D
1. Stop engine, wait for all parts to stop  
moving and disconnect spark plug wire.  
Hold bail against handlebar while  
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.  
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.  
3. Squeeze the Forward Clutch Bail  
against the handlebar (see Figure 5-4) and  
re-measure the length of the coils. The  
19  
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WARNING: Before inspecting, cleaning or servicing the machine, shut off engine, wait for all  
moving parts to come to a complete stop, disconnect spark plug wire and move wire away from  
spark plug. Failure to follow these instructions can result in serious personal injury or property  
damage.  
5. Release the Reverse Clutch Control  
knob.and then unthread the inner jam nut  
(C, Figure 5-6) one to two turns. Pull the  
threaded cable adjuster (A, Figure 5-6) to  
the left until the inner jam nut (C) touches  
the bracket.  
Replacement Belt Information  
FORWARD CLUTCH  
BAIL ADJUSTMENT  
If the drive belt needs to be replaced, see  
your local authorized dealer or refer to the  
Parts List for ordering information. Use  
only a factory-authorized belt as an “over-  
the-counter” belt may not perform satis-  
If the Forward Clutch Bail does not func-  
tion properly, first check that the forward  
drive belt is adjusted properly (see Check-  
ing and Adjusting Forward Drive Belt Ten-  
sion). If this fails to correct the problem,  
contact Troy-Bilt LLC or your authorized  
dealer for service advice.  
6. Prevent the inner jam nut (C) from turn- factorily. The procedure requires average  
ing and tighten the outer jam nut (D) mechanical ability and commonly available  
against the bracket. Prevent the outer jam tools.  
nut (D) from turning and tighten the inner  
ENGINE CLEANING  
jam nut (C) against the bracket.  
CHECKING AND ADJUSTING RE-  
VERSE 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 en-  
gine is running at full speed.  
Keeping the engine clean will help to en-  
sure smooth operation and prevent dam-  
age from overheating. Refer to the Engine  
Owner’s Manual for engine cleaning ser-  
vice intervals and instructions. Be sure  
that the muffler is cool before servicing the  
engine.  
7. Measure the gap by repeating Step 3.  
Readjust as needed by repeating Steps 5  
and 6.  
8. Reinstall the belt cover.  
AIR CLEANER SERVICE  
When checking belt tension, also check the  
belt for cracks, cuts or frayed edges and  
replace it as soon as possible.  
The air cleaner filters dirt and dust out of  
the air before it enters the carburetor. Op-  
erating 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. In-  
spect and service the air cleaner more of-  
ten if operating in very dusty or dirty  
conditions. Refer to the engine Owner’s  
Manual for air cleaner service intervals and  
instructions.  
• Check belt tension after the first two  
hours of break-in operation and after every  
10 operating hours.  
A B  
To Check Reverse Belt Tension:  
1. Stop engine, wait for all parts to stop  
moving and disconnect spark plug wire.  
2. Remove screw in plastic belt cover and  
slide belt cover (which is attached to for-  
ward clutch cable) out of the way.  
Figure 5-5: Measure cable wire length to  
check for correct reverse belt tension.  
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 ca-  
ble wire is attached.  
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.  
It is recommended that you change the  
motor oil after every 10 hours of operation  
and even sooner when operating in ex-  
tremely dirty or dusty conditions. Refer to  
the Engine Owner’s Manual for detailed  
service instructions.  
4. The belt tension is ideal if the cable wire  
length measures between 1/8" to 1/4". If it  
is less than 1/8" (and if there is no reverse  
action when the tiller is running), then make  
the following adjustments  
D
A
C
A. To Check the Engine Oil Level:  
NOTE: If the length is more than 1/4", no ad-  
justment is needed—as long as the reverse  
action functions properly.  
1. Park the tiller on a level area and shut  
off the engine.  
2. Level the engine (use the Depth Regu-  
Figure 5-6: Move threaded adjuster (A) to left  
to increase belt tension.  
lator Lever to adjust the engine angle).  
20  
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WARNING: Before inspecting, cleaning or servicing the machine, shut off engine, wait for all  
moving parts to come to a complete stop, disconnect spark plug wire and move wire away from  
spark plug. Failure to follow these instructions can result in serious personal injury or property  
damage.  
3. Clean around the oil dipstick or oil fill  
tube (whichever applies) to prevent dirt  
from falling into the crankcase.  
THROTTLE LEVER ADJUSTMENT OFF-SEASON STORAGE  
If the engine does not respond to various  
throttle lever settings, refer to the Engine  
When the tiller won’t be used for an ex-  
tended period, prepare it for storage as fol-  
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.  
Owner’s Manual for service information or lows:  
contact your local authorized engine deal-  
1. Clean the tiller and engine.  
er.  
2. Do routine tiller lubrication and check  
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.  
for loose parts and hardware.  
3. Protect the engine and perform recom-  
mended engine maintenance by following  
the storage instructions found in the En-  
gine 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  
enginemanufacturer’srecommendations).  
B. To Change the Engine Oil:  
Change the engine oil as instructed in the  
Engine Owner’s Manual.  
Authorized service shall be  
sought if a problem exists.  
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.).  
CARBURETOR/GOVERNOR  
CONTROL ADJUSTMENTS  
The carburetor was adjusted at the factory  
for best operating speed. Refer to the En-  
gine Owner’s Manual for any adjustment  
information or see your authorized engine  
dealer.  
SPARK PLUG SERVICE  
Inspect and clean or replace the spark plug  
after every 100 operating hours or annual-  
ly. Refer to the Engine Owner’s Manual for  
spark plug service instructions.  
In some areas, local law requires using re-  
sistor spark plugs to suppress ignition sig-  
nals. If the engine was originally equipped  
with a resistor spark plug, use the same  
type for replacement.  
The governor controls the maximum safe  
operating speed and protects the engine  
and all moving parts from damage caused  
by overspeeding. Do not tamper with the  
engine governor settings.  
SPARK ARRESTER SCREEN  
SERVICE  
If the engine muffler is equipped with a  
spark arrester screen, remove and clean it  
according to the service intervals and in-  
structions in the Engine Owner’s Manual.  
21  
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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  
POSSIBLE CAUSE  
CORRECTION  
Engine does not start  
1. Spark plug wire disconnected.  
1. Reconnect wire.  
2. Engine Throttle Control Lever incorrectly set.  
3. Fuel tank empty.  
2. Put lever in START position.  
3. Add fuel.  
4. Choke control (if so equipped) in incorrect position.  
5. Stale gasoline.  
4. See Engine Owner’s Manual.  
5. Drain fuel and add fresh fuel.  
6. Clean or replace filter.  
6. Dirty air filter.  
7. Defective or incorrectly gapped spark plug.  
8. Carburetor out of adjustment.  
9. Misadjusted throttle control.  
10. Dirt or water in fuel tank.  
7. Inspect spark plug.  
8. See Engine Service Dealer.  
9. See Engine Service Dealer  
10. See Engine Service Dealer.  
Engine runs poorly.  
1. Defective or incorrectly gapped spark plug.  
2. Dirty air filter(s).  
1. Inspect spark plug (see Engine Owner’s Manual).  
2. Clean or replace (see Engine Owner’s Manual).  
3. See Engine Service Dealer.  
3. Carburetor out of adjustment.  
4. Stale gasoline.  
4. Replace with fresh gasoline.  
5. See Engine Service Dealer.  
5. Dirt or water in fuel tank.  
6. Engine cooling system clogged.  
1. Engine cooling system clogged.  
2. Carburetor out of adjustment.  
3. Oil level is low.  
6. Clean air cooling system (see Engine Owner’s Manual).  
1. Clean air cooling area (see Engine Owner’s Manual).  
2. See Engine Service Dealer.  
Engine overheats.  
3. Check oil level (see Engine Owner’s Manual).  
1. See Engine Owner’s Manual or Engine Service Dealer.  
1. Review Sections 3 and 4.  
Engine does not shut off  
1. Misadjusted throttle control or ignition switch.  
Wheels and Tines will not turn 1. Improper use of controls.  
2. Worn, broken, or misadjusted drive belt(s).  
2. See “Checking Drive Belt Tension,” Section 5.  
3. Contact local dealer or the factory.  
4. Tighten bolt.  
3. Internal transmission wear or damage.  
4. Bolt loose in transmission pulley.  
1. Wheel Drive Pins not in WHEEL DRIVE.  
2. Bolt loose in transmission pulley.  
3. Internal transmission wear or damage.  
Tines turn, but wheels don’t.  
1. See “Wheel Drive Pins” in Section 3.  
2. Tighten bolt.  
3. Contact local Dealer or the Factory.  
1. Replace hardware.  
Wheels Turn, but Tines Don’t. 1. Tine holder mounting hardware missing.  
2. Bolt loose in transmission pulley.  
2. Tighten bolt.  
3. Internal transmission wear or damage.  
3. Contact local Dealer or the Factory.  
1. See “Bolo Tines” (Section 5).  
2. See “Tilling Tips & Techniques,” Section 4.  
3. See Section 4.  
Poor tilling performance.  
1. Worn tines.  
2. Improper Depth Regulator setting.  
3. Incorrect throttle setting.  
4. Forward Drive Belt slipping.  
4. See “Checking Forward Drive Belt Tension,” Section 5.  
22  
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SECTION 6: MODELS 630C, 634F & 634A PARTS LIST  
1
13  
3
5
7
8
20  
9
14  
7
4
15  
2
11  
17  
16  
10  
6
19  
1
18  
9
12  
4
7
(A) For Model 630C  
(B) For Model 634F  
(C) For Model 634A  
15  
REF  
NO.  
REF  
NO.  
12  
13  
14  
PART NO.  
1185469  
DESCRIPTION  
PART NO.  
DESCRIPTION  
1
2
3
4
5
6
7
8
Spirol Pin  
GW-55015  
GW-55018  
686-04041  
686-04043  
GW-55088  
GW-9384  
Drag Bar  
710-0597  
710-0599  
710-0874  
710-3008  
712-0324  
712-0429  
1916707  
736-0119  
GW-55013-1  
GW-55013-2  
Hex Hd. Screw, 1/4-20 x 1  
Screw, Self-Tapping,1/4-20 x 1/2  
Hex Hd. Screw, 5/16-18 x 1-1/4  
Hex Hd. Screw, 5/16-18 x 3/4  
Lock Nut, 1/4-20  
Lock Nut, 5/16-18  
Support Bracket  
Lock Washer, 5/16  
Hood Bracket, Left Hand  
Hood Bracket, Right Hand  
Depth Regulator Lever  
Tine Hood Assembly (B) (C)  
Tine Hood Assembly (A)  
Bushing  
Spring, Depth Regulator  
Spacer  
Hex Hd. Flange Screw, 5/16-18 x 1  
Trail Shield Stop Bracket  
Transmission Assembly (B) (C)  
Transmission Assembly (A)  
15  
16  
17  
18  
19  
20  
GW-9534  
710-04048  
786-04191  
618-04000  
618-04001  
9
10  
11  
23  
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MODELS 630C, 634F & 634A  
2
5
15  
5
3
16  
12  
10  
21  
1
20  
13  
17  
22  
11  
8
4
7
25  
18  
9
6
7
18  
14  
23  
24  
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MODELS 630C, 634F & 634A  
REF  
NO.  
PART NO.  
1916719  
DESCRIPTION  
1
2
Cable Assembly, Reverse Clutch(B) (C)  
Upper Handlebar  
1916755  
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
20  
21  
22  
23  
25  
747-04210  
1918745  
Bail, Forward Clutch  
Cable Assembly, Forward Clutch  
Screw, Self-Tapping,1/4-20 x 1/2  
Screw, Hex, 5/16-18 x 3/4  
Hex Lock Nut, 5/16-18  
Handlebar Support  
Lower Handlebar  
Panel  
Tab, Conduit Mount  
Screw, #10-24 x 2  
710-0599  
710-3008  
712-3009  
786-04188  
GW-55043  
786-04200  
GW-55044  
GW-9855  
725-0157  
736-3050  
786-04040  
732-04185  
710-0106  
710-0216  
710-0805  
712-0121  
712-0291  
712-3000  
736-0119  
Cable Tie  
Flat Washer, 3/8  
Bracket, Reverse Clutch Cable(B) (C)  
Spring, Forward Clutch  
Hex Hd. Screw, 1/4-20 x 1-1/4  
Screw, Hex, 3/8-16 x 3/4  
Screw, Hex, 5/16-18 x 1-1/2  
Hex Nut, #10-24  
Hex Lock Nut, 1/4-20  
Hex Nut, 3/8-16  
Lock Washer, 5/16  
4
1
3
REF  
NO.  
PART NO.  
1918749  
DESCRIPTION  
1
Bumper (C)  
2
3
4
710-0395  
712-0267  
736-0119  
Hex Screw, 5/16-18 x 2-1/4 (C)  
Nut, Hex, 5/16-18 (C)  
Lock Washer, 5/16 (C)  
2
(A) For Model 630C  
(B) For Model 634F  
(C) For Model 634A  
25  
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MODELS 630C, 634F & 634A  
1
2
3
4
2
5
REF  
NO.  
PART NO.  
GW-9517  
DESCRIPTION  
1
2
3
4
5
Snap Ring  
GW-1714  
Bearing, Tapered Roller (with race)  
Support Washer, Rear  
Drive Shaft (A) (B) (C)  
GW-50043  
711-04109  
GW-1224-1*  
GW-1224-2*  
GW-1224-3*  
GW-1224-4*  
GW-1325C  
Shim, Rear Bearing Cap, .010" thick  
Shim, same as above, except .030" thick  
Shim, same as above, except .005" thick  
Shim, same as above, except .062" thick  
Shim Set (Incl. the following shims:  
(A) For Model 630C  
(B) For Model 634F  
two #1224-1, two 1224-2 & one #1224-4)  
(C) For Model 634A  
* Use as required to obtain between .005” and .015” allowable end-play.  
26  
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MODELS 630C, 634F & 634A  
8
1
2
3
6
4
7
FRONT  
11  
5
10  
9
7
4
3
2
REF  
NO.  
PART NO.  
DESCRIPTION  
1
2
3
GW-9512  
1909950  
Retainer, Snap Ring, “E” Type  
Retainer, Snap Ring  
Shim, 0.062" thick  
Shim, 0.030" thick  
Shim, 0.015" thick  
Shim, 0.010" thick  
Shim, 0.005" thick  
Bronze Bushing  
Wheel Shaft (B) (C)  
Wheel Shaft (A)  
Key, Hi-Pro, 1/4 x 1  
Spacer  
GW-1166-1*  
GW-1166-2*  
GW-1166-3*  
GW-1166-4*  
GW-1166-5*  
GW-1086  
711-04092  
711-04088  
GW-9305  
GW-1132-2  
1904278  
711-04078  
GW-1104  
4
5
6
7
8
9
10  
11  
Worm Gear, Wheel Shaft  
Tiller Shaft  
Woodruff Key  
(A) For Model 630C  
(B) For Model 634F  
1904279  
Worm Gear, Tiller Shaft  
(C) For Model 634A  
* Use as required to obtain between .005” and .030” allowable end-play.  
27  
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MODELS 630C, 634F & 634A  
1
2
5
2
6
4
6
7
8
9
11*  
8
10  
12  
13  
3
10  
14  
* Included with transmission when purchased as an assembly only.  
Remove and discard when installing the transmission on tiller.  
REF  
REF  
NO.  
PART NO.  
NO.  
DESCRIPTION  
PART NO.  
721-04031  
619-04013  
721-04036  
736-3008*  
718-04008  
710-04048  
710-3008  
DESCRIPTION  
Oil Seal, Wheel Shaft  
Transmission Housing Assembly  
Oil Seal, Tine Shaft  
Washer, Flat, .344 x .750 x .120  
Rear Bearing Cap  
Hex Hd. Flange Screw, 5/16-18 x 1  
Hex Hd. Flange Screw, 5/16-18 x 3/4  
1
2
3
4
5
6
7
GW-9727  
710-04049  
736-0119  
1918377  
1916641  
GW-50032  
714-04030  
Plug, Transmission Oil Fill  
Hex Hd. Flange Screw, 5/16-18 x 5/8,Gr. 5  
Lock Washer, 5/16  
Rear Cover, Transmission  
Front Cover, Transmission  
Gasket, Housing Cover  
8
9
10  
11  
12  
13  
14  
Oil Seal, Drive Shaft  
28  
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MODELS 630C, 634F & 634A  
Hold Tines With Blunt End Toward You  
7
9
10  
FRONT  
RIGHT-HAND TINE  
LEFT-HAND TINE  
NOTE: Identify Left and Right sides of tiller by standing in  
operator position and facing direction of forward travel.  
9
2
1
3
WHEEL SHAFT  
3
7, 8  
10  
4
2
5
3
2
TINE SHAFT  
6
4
3
(A) For Model 630C  
(B) For Model 634F  
(C) For Model 634A  
1
5
REF  
NO.  
REF  
NO.  
PART NO.  
DESCRIPTION  
PART NO.  
GW-9338  
DESCRIPTION  
1
710-0514  
Hex Hd. Screw, 3/8-16 x 1, Grade 5  
10  
Hair Pin Cotter  
2
3
4
5
6
GW-50049-02  
712-3000  
710-0347  
GW-50049-01  
1916747  
1915075  
1917486  
1917487  
GW-55095-01  
GW-55095-02  
GW-9380  
Single Bolo Tine - Left Hand (A) (B) (C)  
Hex Lock Nut, 3/8-16  
Hex Hd. Screw, 3/8-16 x 1-3/4  
Single Bolo Tine - Right Hand (A) (B) (C)  
Tine Holder (B) (C)  
GW-1901  
Bolo Tine Replacement Set (Incl. eight  
right-hand tines, eight left-hand tines and  
required hardware. (A) (B) (C)  
Left Hand Tine Assembly (Incl. one tine  
holder and eight tines, assembled) (B) (C)  
Right Hand Tine Assembly (Incl. one tine  
holder and eight tines, assembled) (B) (C)  
Left Hand Tine Assembly (Incl. one tine  
holder and eight tines, assembled) (A)  
642-0029  
642-0030  
642-0031  
642-0032  
Tine Holder (A)  
7
Wheel & Tire Ass’y — Left/Right Side(B)  
Wheel & Tire Ass’y — Left/Right Side (C)  
Wheel & Tire Ass’y — Left Side Only (A)  
Wheel & Tire Ass’y — Right Side Only (A)  
Clevis Pin, .312" x 1-3/4"  
Right Hand Tine Assembly (Incl. one tine  
holder and eight tines, assembled) (A)  
8
9
29  
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MODELS 630C, 634F & 634A  
REVERSE  
CLUTCH CABLE  
9
15  
30  
28  
28  
32  
20  
24  
3
25  
31  
17  
41  
38  
5
39  
11  
2 (B, C)  
37 (A)  
19  
1
23  
1
36  
38  
27  
1
8
28  
12  
29  
43  
40  
16  
10  
28  
37  
19  
7
1
19  
39  
28  
16  
18  
21  
38  
4
33  
14  
34  
FORWARD  
CLUTCH CABLE  
35  
28  
42  
13  
24  
22  
22  
6
24  
30  
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MODELS 630C, 634F & 634A  
REF  
NO.  
PART NO.  
736-0159  
DESCRIPTION  
Flat Washer, 5/16  
1
2
3
714-0139  
1916531  
GW-55035  
1916532  
GW-55031  
1916535  
1916652  
1916657  
GW-55037  
1916658  
1916660  
1916724  
1916725  
1916726  
1916794  
1916795  
1917326  
1917746  
1918731  
1918744  
710-0117  
710-0237  
710-0376  
710-04049  
710-0520  
710-0599  
710-3103  
712-3000  
712-3009  
736-0119  
736-3050  
736-3090  
748-04026  
GW-1138-2  
GW-50027  
GW-55034  
GW-55049  
GW-9090  
GW-9301  
736-3078  
GW-9944  
GW-55039  
710-0805  
712-3010  
710-0157  
Key, 3/16" x 2" (B) (C)  
Pulley, Engine Drive (B) (C)  
Pulley, Engine Drive (A)  
Transmission Pulley (B) (C)  
Transmission Pulley  
Pulley, Reverse Idler (B) (C)  
Guard, Belts/Pulleys  
Forward Drive Belt (B) (C)  
Forward Drive Belt (A)  
Reverse Drive Belt (B) (C)  
Belt Cover  
Reverse Return Spring (B) (C)  
Belt Guide(B) (C)  
Forward Belt Guide (B) (C)  
Engine Bracket, Left  
Engine Bracket, Right  
Bracket, Belt Cover  
Shoulder Washer  
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
38  
39  
40  
41  
42  
43  
Reverse Idler Arm (B)(C)  
Forward Idler Lever  
Hex Hd. Screw, 5/16-24 x 1 (B) (C)  
Hex Hd. Screw, 5/16-24 x 5/8  
Hex Hd. Screw, 5/16-18 x 1  
Hex Hd. Screw, 5/16-18 x 5/8  
Hex Hd. Screw, 3/8-16 x 1-1/2  
Screw, Self-Tapping, 1/4-20 x 1/2  
Hex Hd. Screw, 5/16-18 x 2 (B) (C)  
Lock Nut, 3/8-16  
Lock Nut, 5/16-18 (B) (C)  
Lock Washer, 5/16  
Flat Washer, 3/8  
Flat Washer  
Spacer (A)  
Shim  
Support Washer  
Forward Return Spring  
Bracket, Cable Mounting  
Forward Idler Pulley  
Key, 3/16" x 1"  
Flat Washer  
Belleville Washer  
Forward Belt Guide (A)  
Hex Hd. Screw, 5/16-18 x 1-1/2 (A)  
Hex Nut, 5/16-18 (A)  
Hex Hd. Screw, 5/16-24 x 3/4 (A)  
(A) For Model 630C  
(B) For Model 634F  
(C) For Model 634A  
31  
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TROY-BILT TILLER LIFETIME LIMITED WARRANTY  
WHAT PRODUCT  
IS COVERED  
All Troy-Bilt branded rear tine walk-behind tillers with gear drive transmissions.  
This warranty begins on the date of purchase and is warranted by Troy-Bilt LLC for the life of the  
tiller, to the original purchaser only.  
WHAT IS COVERED  
BY THIS WARRANTY  
Troy-Bilt LLC will, at its option, repair or replace any part found to be defective in material or  
workmanship without charge for parts and labor  
This limited lifetime warranty also applies to non-powered attachments and accessories.  
Powered attachments and accessories are warranted separately by their manufacturers. Refer  
to the applicable manufacturer’s warranty on these items for terms and conditions.  
WHAT IS NOT  
COVERED BY THIS  
WARRANTY  
This warranty does not apply to parts that have been damaged by accident, alteration, misuse,  
abuse, neglect, improper maintenance, vandalism, theft, fire, water, or damage because of peril  
or other natural disaster.  
The following items are not covered after the first year of this residential use limited warranty:  
belts, batteries, bushings, seals, tines, tires, wheels, paint, appearance items, and similar items  
that are 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  
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  
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