Troy-Bilt TUFFY 643B Operator's Manual
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Troy-Bilt TUFFY 643B Operator's Manual

Troy-Bilt TUFFY 643B Operator's Manual

Rear-tine tiller models
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Operator's Manual
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Rear-tine
Tiller
Models
643C m Tuffy¢ / Bronco CRT
643B, 645A -- Super BroncoTM
Mode1645A 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 attester 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. BOX361131CLEVELAND, O HIO44136-0019
PRINTEDIN U.S.A.
FORMNO. 769-00585E.
11/11/05

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Summary of Contents for Troy-Bilt TUFFY 643B

  • 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 through your nearest engine authorized service dealer or contact the service department, Cleveland, Ohio 44136-0019. Troy-Bilt LLC, P.O. BOX361131CLEVELAND, O HIO44136-0019 PRINTEDIN U.S.A. 'w//////al&_,411111111111111F Rear-tine 643C m Tuffy¢...

  • Page 2: Customer Support

    If you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of this unit, you can seek help from the experts. Choose from the options below: Visit troy-bilt.com will get the four options reproduced here. Click on the appropriate button and help is immediately available.

  • Page 3: Section 1: Safety

    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. WARNING The engine exhaust from this productcontains chemicals known to the State of California to cause cancer, birth defects or other reproduc- tive harm.
  • Page 4 5.If theunit s hould s tart t ovibrate a bnor- mally, stop theengine, disconnect the spark p lug wireand prevent itfrom touch- ingthespark p lug, and check i mmediately forthecause. Vibration isgenerally a warning oftrouble. 6.Stop theengine, disconnect thespark plug wire and prevent itfrom touching the spark p lug, whenever youleave t heoperat- ingposition, before u nclogging the tines, orwhen making anyrepairs, adjustments...
  • Page 5 Decals For your safety and the safety of others, vari- ous safety and operational decals are located on your unit (seeFigure 1-2). Keepthe decals clean and legible at all times. Contactyour local service dealer or thefactory for replacementsif any decals are damagedor missing.

  • Page 6: Section 2: Assembly

    15 days after the unit has been delivered. Contact Troy-Bilt LLCif you need assis- tance in this matter. TOOLS / MATERIALSNEEDED (2) 1/2" open-end wrench* (2) 9/16"...
  • Page 7 The supportbracketsmust be assembledto the outside of the handlebar assembly. Fig. 2.2: Attachhandlebar. through the wheel shaft (L) only (not through the wheel hub). The wheelshould now spin freely (freewheel) on the wheel shaft. Repeatwith the other wheel. 4. Use the handlebar to roll the tiller to a flat area.
  • Page 8 4. Testthe function ofthe reverseclutch by pulling out and releasingthe 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. Flat Side Fig. 2-8: Install reverse cable bracketand reverse clutchcable.
  • Page 9 5! =-P6: CHECK TRAHSMiSSiOH OIL LEVEL Thetransmission was filled with gear oil at the factory. However, y ou should checkthe gear oil level at this time to make certain it is correct. IMPORTANT:Donot operatethe tiller if the gear oil level is low. Doing so will result in severe damageto the transmission com- ponents.

  • Page 10: Section 3: Features A Ndcontrols

    SECTION 3: FEATURES A NDCONTROLS operating your machine, ARNING: Before carefully readand understand all safety, controls and operating instructions in this Manual, the separateEngine Owner's Manual,and on the decals on the machine. Failureto follow these instructions can result in serious personal injury. INTRODUCTION This Section describes the location and function of the controls on your tiller.
  • Page 11 Figure 3-3: FREEWHEEL position. WARNING: Beforestarting engine, be sure that both wheels are in WHEELDRIVE position. See WheelsDrive Pins for instructions. Engagingthe Forward Clutch Bail or ReverseClutch Control (if equipped) when the wheels are not in WHEEL DRIVEcould allow the tines to rapidly propel the tiller forward or backward.

  • Page 12: Section 4: Operation

    SECTION 4: OPERATION operating your machine, ARNING: Before carefully readand understand all safety (Section 1), controls (Section 3) and operating instructions (Section 4) in this Manual, the separateEngine Owner's Manual,and on the decals on the machine. Failureto follow these instructions can result in serious personal injury.
  • Page 13 Stopping the Engineand Tiller 1. Tostop the wheels and tines, releasethe Forward Clutch Bail (all models) orthe Re- verse Clutch Control (Models 643B & 645A) -- whichever control is in use. 2. Tostop the engine, put the ignition switch and/or the throttle control lever in the "OFF"or "STOP"...

  • Page 14: Tillingtips& Techniques

    Tilling Depths WAHNING: Before tilling, contact your telephone or utilities company and inquire if underground equipment or lines are usedon your property. Do not till near buried electric cables, telephone lines, pipes or hoses. • Whencultivating (breakingup surfacesoil around plants to destroyweeds,seeFig.4-9), a just 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.
  • Page 15 TILLINGTIPS & TECHNIQUES (CON'T) Tilling OnSlopes Read the followingrecommendationsbeforetilling on slopes: If you must gardenon a moderateslope, pleasefollow two very importantguidelines: 1. Till only on moderateslopes,neveron steepground wherefooting is difficult (review safe- ty rulesin Section 1: Safetyof this manual). 2. We recommendtilling up and down slopes ratherthan terracing. Tilling vertically on a slopeallows maximum plantingarea and also leavesroom for cultivating.
  • Page 16 TerraceGardening(continued) • Tocreate a terrace, start at the top of the slopeand work down. Go back and forth acrossthe first row as shown in Fig.4-10. • Eachsucceedinglowerterrace is startedby walking belowthe terrace you're 0 preparing.Foraddedstability of thetiller, alwayskeepthe uphill wheel in thesoft, newlytilled soil.

  • Page 17: Section 5: Maintenance

    SECTION 5: MAINTENANCE WARNING: Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Remove ignition key on electric start models.
  • Page 18 moving parts to come to a complete stop, disconnect spark plug wire and move wire away from WARNING: spark plug. Failureto follow these instructions can result in serious personal injury or property damage. 4. Thegear oil level is correct if the gear oil is approximately halfway up the side of the main drive shaft.
  • Page 19 moving parts to come to a complete stop, disconnect spark plug wire and move wire away from WARNING: spark plug. Failureto follow these instructions can result in serious personal injury or property damage. FORWARD Figure 5-3: Install tinesso that cuttingedge oftines entersoft first when tiller movesforward. CHECKINGAND ADJUSTING FORWARDDRIVE BELT TENSION It is important to maintain correct tension...
  • Page 20 (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. CHECKING ANDADJUSTING RE- VERSEDRIVEBELTTENSION (Models643B &...
  • Page 21 moving parts to come to a complete stop, disconnect spark plug wire and move wire away from WARNING: spark plug. Failureto follow these instructions can result in serious personal injury or property damage. 3. Cleanaround the oil dipstick or oil fill tube (whichever applies) to prevent dirt from failing into the crankcase.

  • Page 22: Troubleshooting

    moving parts to come to a complete stop, disconnect spark plug wire and move wire away from WARNING: spark plug. Failureto follow these instructions can result in serious personal injury or property damage. PROBLEM Enginedoes not start Spark plug wire disconnected. Engine Throttle Control Lever incorrectly set.
  • Page 23 NOTES...
  • Page 24 Models643C, 643B & 645A...
  • Page 25 PART NO. 686-04043 TineHoodAssembly (A) 686-04041 TineHoodAssembly (B)(C} HexScrew,5/16-18x 2.25 710-0395 HexHd.Screw,1/4-20x 1 710-0597 710-0599 Screw,Self-Tapping,I/4-20 x 1/2 710-0874 mex Hd.Screw,5/16-18x 1-1/4 710-3008 mex Hd.Screw,5/16-18x .75 712-04063 HexLockNut,Nylon,5/16-18 712-04064 HexLockNut,Nylon,1/4-20 715-0108 SpirolPin 732-04320 Spring,DepthRegulator 736-0275 Flat W asher,5/16 750-04149 Spacer, . 462x .328x 1.63 750-04160 Bushing 750-04556...
  • Page 26 MODELS 643C,643B & 645A PARTNO. GW-9517 Snap Ring GW-1714 Bearing, Tapered Roller (with race) GW-50043 Support Washer, Rear 711-04110 Drive Shaft GW-1224-1 * Shim, RearBearing Cap, .010"thick GW-1224-2" Shim, sameas above, except .030" thick GW-1224-3" Shim, same asabove, except .005"thick GW-1224-4"...
  • Page 27 FRONT (A) ForModel 6 43C (B) ForModel 6 43B * Useas (C) ForModel 6 45A MODELS 643C,643B & 645A PARTNO. DESCRIPTION 1909950 Retainer, SnapRing GW-1166-1 * Shim,0.062"thick GW-1166-2" Shim,0.030"thick GW-1166-3" Shim,0.015"thick GW-1166-4" Shim,0.010"thick GW-1166-5" Shim,0.005"thick GW-1086 Bronze Bushing 711-04512 Wheel S haft(A) 711-04486 Wheel S haft(B) (C) GW-9305...
  • Page 28 MODELS 643C,643B & 645A Model 643C...
  • Page 29 PARTNO. 736-0159 FlatWasher, 5/16 756-04198 Pulley, Engine Drive 656-04023 Transmission Pulley (A) 656-04005 Transmission Pulley (B} (C) 756-04169 Pulley, ReverseIdler (B) (C) 786-04095 Guard, Belts/Pulleys 754-04090 Forward Drive Belt 754-04091 ReverseDrive Belt (B) (C) 731-05268 Belt Cover 732-04289 Reverse Return Spring (B) (C) 732-04081 Belt Guide (B) (C) 732-04079...
  • Page 30 NOTES...
  • Page 31 NOTES...

  • Page 32: Lifetime Limited Warranty

    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.

This manual is also suitable for:

Tuffy 645aTuffy 643cTuffy/bronco crt 643cSuper bronco 643b

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