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Troy-Bilt ProLine 644H Bronco Operator's Manual
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Troy-Bilt ProLine 644H Bronco Operator's Manual

Troy-Bilt ProLine 644H Bronco Operator's Manual

Rear-tine tiller
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0 TRtlI BILT°
Operator's Manual
Rear-tine
Tiller Models
644H--Bronco
TM
645A--Bronco
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. 769-00585
(12/2002)

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Summary of Contents for Troy-Bilt ProLine 644H Bronco

  • Page 1 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 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.
  • Page 2 You can locate the model number by looking at the rear surface of the tine shield. A sample model plate is explained below. For future reference, please copy the model number and the serial number of the equipment in the space below OTRII BILT" TROY-BILT P. O. BOX 361131 www.troybilt.com CLEVELAND, 330-558-7220 •...
  • Page 3 Safety SPARKARRESTERWARNING 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.
  • Page 4 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 (see Figure 1 below). ForwardClutch Control OperatingInstruction Starting Stabilization Message onengine Figure 1: Locationof Safetyand OperatingDecals(Model 644H shown). OperatingSymbols Various symbols (shown here, with word descdptions) are used on the tiller and engine (your unit may not haveall of the symbols).
  • Page 6 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), 3/8" flat washers (C) and 3/8"-16 hex Iocknuts (D). 2.
  • Page 8 Section 2: Assembly STEP4: Install Forward Clutch Cable 1. Placethe forward clutch cable bracket (P, Fig. 2-4) on the handlebar support (A). Attach the cable bracket using a 1/4"-20 x 1-1/4" hex hd. screw (R, Fig. 2-4) and 1/4"-20 hex Iocknut (S). Tighten securely. 2.
  • Page 9 4. Insert the cable up through the slot in the cable bracket and position the threaded assembly as shown in Fig. 2-8. Make sure that the flat side of the threaded assembly is aligned with the flat side of the mounting hole. Slide the large hex nut (DD) up the cableand tighten it securely.
  • Page 10 FeaturesandControls 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 describes the locations and functions of the controls on your tiller.
  • Page 11 4. FORWHEELDRIVEmode (Figure 3-2): 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 pinwith the hairpin cotter (C) by pushing the hairpin cotter in as far as it will go.
  • Page 12 Section 3: Features andControls DepthRegulatorLever 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 Operation WARNING Before operating your machine, carefully read and understand all safety (Section 1), controls (Section 3) and operating instructions (Section 4) in this Manual, 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 Section 4: Operation Starting the Engine The following steps describe how to start and stop the engine. Do not attempt to engagetines or wheels until you have read all the operatinginstructionsin this Section. Alsoreview the safety rules in Section1: "Safety" and the tiller and engine controlsinformationin 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.
  • Page 16 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 Clearingthe 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.
  • Page 18 Section 4: Operation LOADINGAND UNLOADINGTHE TILLER WARNING Loading and unloading the tiller into or from a vehicle is potentially hazardous. don't recommend doing so unless absolutely necessary, as this could result in person- al injury or properly damage. However, if you must load or unload the tiller, follow the guidelines given next.
  • Page 19 Maintenance WARNING Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to PROCEDURE come to a complete stop, disconnect spark plug wire Check engine oil level and move wire away from spark plug. Cleanengine Failure to follow these instructions can result in...
  • Page 20 Section 5: Maintenance WARNING Before inspecting,cleaning or servicing the unit, shut off engine, wait for all parts to come to a complete stop, 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 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 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 foilow these instructions can resuit in serious personai injury or propertydamage.
  • Page 23 WARNING Before inspecting, cleaning or servicingthe 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 servicingthe 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 25 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 Dealerfor engine service. Contact your local authorized equipment dealer or the factory for all other service problems. PROBLEM POSSIBLE CAUSE Engine does...
  • Page 26 List...
  • Page 27 Spacer 710-04048 HexHd.Flange Screw,5/16-18x 1 618-04046 Transmission Assembly (CRT) 1916569 FlapStopBracket 1916570 Reverse StopArm 710-3073 HexScrew,5/16-18x 225 1916771 Spacer, . 462x .328x 1.63 1107382 FlatWasher, 5 /16 710-3025 HexScrew,5/16-18x .625 1916708 HoodSupportBracket 1916707 Channel SupportBracket MODELS 644H & 645A DESCRIPTION...
  • Page 28 MODELS 644H & 645A...
  • Page 29 Screw,#10-24x 2 725-0157 Cable Tie 736-3050 FlatWasher, 3 /8 1916674 Bracket, R everse ClutchCable 1916712 Spring,Forward Clutch 710-0106 HexHd.Screw,1/4-20x 1-1/4 710-0216 Screw,Hex,3/8-16x 3/4 710-0805 Screw,Hex,5/16-18x 1-1/2 712-0121 HexNut,#10-24 712-0291 HexLockNut,1/4-20 712-3000 HexNut,3/8-16 736-0119 LockWasher, 5 /16 DESCRIPTION MODELS 644H & 645A...
  • Page 30 MODELS 644H & 645A * Useas requiredto obtainbetween .005"and .015"allowable end-play, PARTNO. DESCRIPTION GW-9517 SnapRing GW-1714 Bearing, T apered Roller(with race) GW-50043 SupportWasher,Rear 711-04110 DriveShaft(ORT) GW-1224-1 * Shim,RearBearing Cap,.010"thick GW-1224-2" Shim,sameasabove, e xcept.030"thick GW-1224-3" Shim,sameasabove, e xcept.005"thick GW-1224-4" Shim,sameasabove, e xcept.062"thick...
  • Page 31 * Useas required to obtain between .005" and .030" allowable end-play, DESCRIPTION Retainer, SnapRing,"E"Type Retainer, S nap Ring Shim,0,062"thick Shim,0,030"thick Shim,0,015"thick Shim,0,010"thick Shim,0,005"thick Bronze Bushing Wheel S haft(CRT) Key,Hi-Pro,1/4x 1 Spacer WormGear, W heel S haft TillerShaft WoodruffKey WormGear, T illerShaft MODELS 644H & 645A...
  • Page 32 MODELS 644H & 645A PART NO. GW-9727 Plug,Transmission OilFill 710-04049 HexHd.Flange Screw,5/16-18x 5/8,G r. 5 736-0119 LockWasher, 5 /16 1918377 Rear C over,Transmission 1916641 FrontCover, T ransmission GW-50032 Gasket, H ousing Cover 721-04030 Oil Seal,DriveShaft * includedwith transmission whenpurchased asan assembly only.
  • Page 33 LH Tine Holder 1916703 RH Tine Holder WHEELSHAFT TINE SHAFT ENGINE CUTTING EDGE DESCRIPTION 1917487 GW-9380 GW-9338 712-3000 1817059 MODELS 644H & 645A FRONT/ =ORWARD PARTNO. DESCRIPTION Wheel & TireAss'y-- Left/Right S ide ClevisPin,.312"x 1-3/4" HairPinCotter HexLockNut,3/8-16 Replacement TinesSet(Incl.three LHtines threeRHtinesandrequired hardware)
  • Page 34 MODELS 644H & 645A I_i_ccLREVERSE UTCH CABLE j• FORWARD CLUTCH CABLE...
  • Page 35 GW-55034 Forward Return Spring GW-55049 Bracket,Cable Mounting GW-9090 Forward idler Pulley GW-9301 Key, 3/16" x 1" GW-9929 FlatWasher GW-9944 Belleville Washer 710-0395 HexScrew, 5/16-18 x 2.25 Gr5 GW-1138-2 Shim, 1.0 x .765 x .031 (A Only) MODELS 644H & 645A...
  • Page 36 All Troy-Bilt branded rear tine walk-behind tillers with gear drive transmissions. ISCOVERED This warranty begins on the date of purchase and is warranted by Troy-Bilt LLC for the life of the tiller, to the odgina] purchaser only. WHAT IS COVERED...

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