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Model 644H Shown (bumper syles vary)
IMPORTANT:READ SAFETY RULES AND INSTRUCTIONS CAREFULLY
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-
covered or grass-covered land unless the engine's exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any).
If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law
(Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester
for the muffler is available by contacting the service department at Troy-Bilt LLC, P.O. Box 361131 Cleveland, Ohio 44136-0019.
TROY-BILT LLC, P.O. BOX 361131, CLEVELAND, OH 44136-0019
PRINTED IN USA
Operator's Manual
Rear-tine Tiller Models
644H—Bronco
645A—Bronco
FROM NO. 769-00585B
TM
TM
(11/2003)
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Summary of Contents for Troy-Bilt 644H-Bronco
- Page 1 (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available by contacting the service department at Troy-Bilt LLC, P.O. Box 361131 Cleveland, Ohio 44136-0019.
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Page 2: Customer Support
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. - Page 3 Section Safety SPARK ARRESTER WARNING TO RESIDENTS OF CALIFORNIA AND SEVERAL OTHER STATES Under California law, and under the laws of several other states, you are not permitted to operate an internal combustion engine using hydrocarbon fuels on any forest, brush, hay, grain, or grass covered land;...
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Page 4: Maintenance And Storage
Section 1: Safety 7. Take all possible precautions when leaving the machine unattended. Stop the engine. Disconnect spark plug wire and move it away from the spark plug. Be sure both wheels are in the Wheel Drive position. 8. Before cleaning, repairing, or inspect- ing, stop the engine and make certain all moving parts have stopped. - Page 5 Decals For your safety and the safety of others, various safety and operational decals are located on your unit (see Figure 1 below). Forward Clutch Control Operating Instruction Starting Stabilization Message on engine Figure 1: Location of Safety and Operating Decals (Model 644H shown). Operating Symbols Various symbols (shown here, with word descriptions) are used on the tiller and engine...
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Page 6: Inspect Unit
Section 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 instruc- tions in this manual. Introduction Carefully follow these assembly steps to correctly prepare your tiller for use. -
Page 7: Step 2: Attach Handlebar
STEP 2: Attach Handlebar 1. Attach the two legs of the handlebar support (A, Fig. 2-2) loosely to the inner sides of the tiller frame using two 3/8"-16 x 3/4" hex hd. screws (B), two 3/8” flat washers (C) and 3/8"-16 hex locknuts (D). 2. -
Page 8: Step 5: Install Reverse Clutch Cable
Section 2: Assembly STEP 4: Install Forward Clutch Cable 1. Carefully unwrap the forward clutch cable (the cable without a knob attached to it) from its shipping position and slide the thin cable wire (T, Fig. 2-4) into the slot in the cable bracket. -
Page 9: Step 6: Check Level Of Transmission Gear Oil
3. Use a cable tie (EE, Fig. 2-9) to fasten the reverse clutch cable to the left side handlebar. 4. Test the function of the reverse clutch cable by pulling the knob out and releasing it. The knob should return to its neutral position (resting against bracket) when it is released. -
Page 10: Features And Controls
Section 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. - Page 11 4. FOR WHEEL DRIVE mode (Figure 3-2): Slide the wheel outward and align the holes in the wheel hub (D, Figure 3-2)) and the wheel shaft (B). Insert the wheel drive pin (A) through the wheel hub and the wheel shaft. Secure the wheel drive pin with the hairpin cotter (C) by pushing the hairpin cotter in as far as it will go.
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Page 12: Anti-Reverse Stake
Section 3: Features and Controls Depth Regulator Lever This lever (G, Figure 3-5) controls the tilling depth of the tines. Pull the lever straight back and slide it up or down to engage the notched height settings. The highest notch (lever all the way down) raises the tines approximately 1- 1/2"... -
Page 13: Initial Operation
Section Operation WARNING Before operating machine, carefully read and understand all safety (Section 1), controls (Section 3) and operating instructions (Section 4) in this Manual, in the separate Engine Owner’s Manual, and on the decals on the machine. Failure to follow these instruc- tions can result in serious personal injury. -
Page 14: Operating The Tiller
Section 4: Operation Starting the Engine The following steps describe how to start and stop the engine. Do not attempt to engage tines or wheels until you have read all the operating instructions in this Section. Also review the safety rules in Section 1: “Safety”... - Page 15 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 backward toward the operator, which could result in loss of control, property damage, or personal injury.
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Page 16: Tilling Tips
Section 4: Operation Let the tiller do the work • 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 foot- prints in the freshly tilled soil) and lightly, but securely grip the handlebar with just one hand. - Page 17 Tilling Tips Clearing the tines Dry grass, stringy stalks or tough vines may become tangled in the tines. Follow these procedures to help avoid tangling and to clean the tines, if necessary. • To reduce tangling, set the depth regulator to maximum depth. •...
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Page 18: Loading And Unloading The Tiller
Section 4: Operation LOADING AND UNLOADING THE TILLER WARNING Loading and unloading the tiller into or from a vehicle is potentially hazardous. We don’t recommend doing so unless absolutely necessary, as this could result in person- al injury or property damage. However, if you must load or unload the tiller, follow the guidelines given next. -
Page 19: Required Maintenance Schedule
Section Maintenance WARNING Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Failure to follow these instructions can result in serious personal injury or property damage. -
Page 20: Tiller Lubrication
Section 5: Maintenance WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all 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. - Page 21 WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all 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.
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Page 22: Checking And Adjusting Forward Drive Belt Tension
Section 5: Maintenance WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all 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. -
Page 23: Forward Clutch Bail Adjustment
WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all 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. -
Page 24: Carburetor/Governor Control Adjustments
Section 5: Maintenance WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all 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. -
Page 25: Troubleshooting
Before performing any corrections, refer to the appropriate information in this Manual, or in the Engine Owner’s Manual, for the correct safety precautions and operating or maintenance procedures. Contact your local authorized Engine Service Dealer for engine service. Contact your local authorized equipment dealer or the factory for all other service problems. PROBLEM POSSIBLE CAUSE Engine does... - Page 26 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.