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0 TRtllcBILT' -
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Operator's Manual
Rear-tine Tiller Models
644HmBronco
TM
645AmBronco
TM
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
FROM NO. 769-00585B
(11/2003)
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Table of Contents
Related Manuals for Troy-Bilt PRO LINE 644HMBRONCO
Summary of Contents for Troy-Bilt PRO LINE 644HMBRONCO
- 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, TROY-BILT LLC, P.O.
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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 Safety SPARK ARRESTERWARNING TO RESIDENTSOF CALIFORNIAAND SEVERALOTHERSTATES Under California law, and under the laws of several other states, you are not permitted to operatean internal combustion engine using hydrocarbon fuels on any forest, brush, hay, grain, or grass covered land; or land covered by any flammable agricultural crop without an engine spark arrester in continuous effective working order.
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Page 4: Maintenance And Storage
Section 1: Safety 7. Take all possible precautions when leavingthe 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 havestopped. - 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). ForwardClutchControl OperatingInstruction StartingStabilization 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
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 Carefullyfollow these assembly steps to correctly prepare your tiller for use. - Page 7 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 Iocknuts (D). 2.
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Page 8: Step5: Install Reverseclutch Cable
Section 2: Assembly STEP4: 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: Step6: Checklevelof Transmission Gearoil
3. Use a cable tie (EE,Fig. 2-9) to fasten the reverse clutch cableto the left side handlebar. 4. Test the function of the reverse clutch cable by pulling the knob out and releasingit. The knob should return to its neutral position (resting against bracket) when it is released. -
Page 10: Features And Controls
Featuresand 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 follow these instructions can result serious personal injury. Introduction This section describesthe locations and functions of the controls on your tiller. - Page 11 4. FORWHEELDRIVEmode (Figure3-2): Slide the wheel outward and align the holes in the wheel hub (D, Figure3-2)) and the wheel shaft (B). Insert the wheel drive pin (A) through the wheel hub and the wheel shaft. Securethe 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: Engine Controls
Section 3: Features a ndControls DepthRegulatorLever This lever (G, Figure3-5) 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 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.
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Page 14: Section 4: Operation
Section 4: Operation Starting the Engine The following steps describe how to start and stop the engine. Do not attemptto engagetines or wheels until you have read all the operatinginstructionsin this Section. Alsoreview the salety rules in Section1: "Safety" and the tiller and engine controlsinlormation in Section 3: "Features and Controls."... - Page 15 WARNING Do not push down on the handlebars to try to make the tiller till more deeply. 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& Techniques
Section 4: Operation Tilling Tips& Techniques Let the tiller dothe 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 & Techniques Clearing the tines Dry grass, stringy stalks or tough vines may becometangled in the tines. Follow these procedures to help avoid tangling and to clean the tines, if necessary. • To reducetangling, set the depth regulator to maximum depth. •...
- Page 18 Section 4: Operation LOADINGAND 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.
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Page 19: Maintenance
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 Section 5: Maintenance WARNING Before inspecting,cleaning or servicing the unit, shut off engine, wait for all parts to come to a completestop, disconnectspark plug wire and movewire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.
- Page 21 WARNING Before inspecting, cleaning or servicingthe unit, shut off engine, wait for all parts to come to a completestop, disconnectspark plug wire and move wire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.
- Page 22 Section 5: Maintenance WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all parts to come to a completestop, disconnectspark plug wire and move wire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.
- Page 23 WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all parts to cometo a complete stop, disconnectspark plug wire and move wire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.
- Page 24 Section 5: Maintenance WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all partsto cometo a completestop, disconnectspark plug wire and movewire away from spark plug. Failure to follow these instructions can result in serious personal injury or propertydamage.
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Page 25: Troubleshooting
Before performing any corrections, refer to the appropriate information correct safety precautions and operating or maintenance procedures. engine service. Contact your local authorized equipment dealer or the factory for all other service problems. PROBLEM POSSIBLE CAUSE Enginedoes 1. Sparkplug wire disconnected. notstart. -
Page 26: Parts List
PartsList... - Page 27 PARTNO. 1185469 Spirol Pin 710-0597 HexHd. Screw, 1/4-20 x 1 710-0599 Screw, Self-Tapping,I/4-20 x 1/2 710-0874 HexHd. Screw, 5/16-18 x 1-1/4 1186331 HexHd. Screw, 5/16-18 x 1.0 712-0291 HexLock Nut, 1/4-20 712-3004A HexFlangeLock Nut, 5/16-18 712-3009 HexNut, 5/16-18 736-0119 Lock Washer, 5/16 GW-55013-1 Hood Bracket,Left Hand GW-55013-2...
- Page 28 MODELS 644H & 645A...
- Page 29 PART NO. 1918749 Bumper 710-0395 HexScrew, 5/16-18 x 2-1/4, Gr5 712-0267 Nut, Hex,5/16-18 736-0119 Lock Washer, 5/16 PARTNO. DESCRIPTION 1916719 OableAssembly, ReverseOlutch 1916755 Upper Handlebar 747-04210 Bail, Forward Olutch 1918745 OableAssembly, Forward Olutch 710-0599 Screw, Self-Tapping,I/4-20 x 1/2 710-3008 Screw, Hex,5/16-18 x 3/4 712-3009 HexLock Nut, 5/16-18 786-04188...
- Page 30 MODELS 644H & 645A * Useas required to obtain between .005" and .015" allowable end-play. PARTNO. DESCRIPTION GW-9517 Snap Ring GW-1714 Bearing,Tapered Roller (with race) GW-50043 Support Washer, Rear 711-04110 Drive Shaft (ORT) GW-1224-1" Shim, RearBearing Oap,.010"thick GW-1224-2" Shim, same as above, except .030"thick GW-1224-3"...
- Page 31 FRONT PARTNO. GW-9512 1909950 GW-1166-1* GW-1166-2" GW-1166-3" GW-1166-4" GW-1166-5" GW-1086 711-04092 GW-9305 GW-1132-2 1904278 711-04078 GW-1104 1916542 Useas required to obtain between .005" and .030" allowable end-play. DESCRIPTION Retainer,Snap Ring, "E" Type Retainer,Snap Ring Shim, 0.062" thick Shim, 0.030" thick Shim, 0.015"...
- Page 32 MODELS 644H & 645A PART NO. GW-9727 Plug,Transmission Oil Fill 710-04049 HexHd. FlangeScrew,5/16-18 x 5i8,Gr. 5 736-0119 Lock Washer, 5/16 1918377 RearCover,Transmission 1916641 Front Cover,Transmission GW-50032 Gasket, Housing Cover 721-04030 Oil Seal,Drive Shaft * Included with transmission when purchased as an assembly only. Removeand discard when installing the transmission on tiller.
- Page 33 Hold Tines With Cutting Edgeat the TOP of eachtine facing TOWARDYou ENOTES CUTTING EDGE OF TINE PART NO. 710-3008 HexHd. Screw,5/16-18 x 3/4, Grade5 1817060 Single Tine - Right Hand 712-3009 HexLock Nut, 5/16-18 710-3096 HexHd. Screw, 3/8-16 x 2 1817059 Single Tine - Left Hand 1916702...
- Page 34 MODELS 644H & 645A...
- Page 35 PARTNO. 736-0159 FlatWasher, 5/16 1108841 Key, 3/16"x 1-1/2" 619-04016 Pulley, Engine Drive 1916532 Transmission Pulley 1916535 Pulley, ReverseIdler 1916652 Guard, Belts/Pulleys 1916657 Forward Drive Belt 1916658 ReverseDrive Belt 1916660 Belt Cover 1916724 ReverseReturn Spring 1916725 Belt Guide 1916726 Forward Belt Guide 1916794 Engine Bracket, Left 1916795...
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Page 36: Lifetime Limited Warranty
All Troy-Bilt branded rear tine walk-behind tillers with gear drive transmissions, IS COVERED 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...