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Troy-Bilt 643C Tuffy/Bronco manual

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Table of contents for the manual

  • Page 1

    Rear -tine Tiller Models 643C — T uffy ® / Bronco CR T 643 B , 645A — Super Bronco TM Model 645A Shown Oper ator’ s Man ual PRINTED IN U.S.A. P. O. Box 1386, 97 Kent Avenue, Kitchener, Ontario N2G 4J1 772C0845 IMPOR T ANT : READ SAFETY RULES AND INSTRUCTIONS CAREFULL Y (12/05)[...]

  • Page 2

    2 TABLE OF CONTENTS FINDING MODEL NUMBER This Operator’s Manual is an impo rtant part of your new tiller. It will help you assemble, prepare and maintain the unit for best performance. Please read and understan d what it says. Before you start assembl ing your new equipment , please locate the model plate on the equipment and copy the information[...]

  • Page 3

    3 Training 1. Carefully read this Own- er’ s Manual, the separate Engine Owner’ s Manual, and any other literature you may receive. Be thoroughly familiar with the controls and the proper use o f the tiller and its en- gine. Know how to stop the unit and disen- gage the controls quickly . 2. Never allow children to operate the tiller . Never al[...]

  • Page 4

    4 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. 6 . Stop the engine, disconnect the spark plug wire and prevent it from to uching the spark plug, whenever you leave[...]

  • Page 5

    5 Decals 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. Refer to the Parts List pages in this Manual for decal locations[...]

  • Page 6

    6 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. INTRODUCTION Carefully follow these assembly steps to correctly prepare your tiller for use. It is recommended that you read this Section in it[...]

  • Page 7

    7 through the wheel shaft (L) only (not through the wheel hub). The wheel should now spin freely (freewheel) on the wheel shaft. Repeat with the other wheel. 4. Use the handlebar to roll the tiller to a flat area. IMPORT ANT: Before starting the engine, the wheels must be placed in the WHEEL DRIVE position (pins thro ugh wheel hubs and wheel shaft)[...]

  • Page 8

    8 4. Check for correct tens ion on the for ward 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. b. Squeeze the Forward Clutch Bail against the handlebar (see[...]

  • Page 9

    9 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. IMPORT ANT : Do not op erate the tiller if the gear oil level is low . Doing so will result in severe damage to the transmission com- ponents. 1. With the tiller [...]

  • Page 10

    10 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. INTRODUCTION This Section describes the location and function of [...]

  • Page 11

    11 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 o[...]

  • Page 12

    12 WARNING: Before 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. Failure to follow these instructions can result in serious personal injur y . INTRODUCTION Read this Oper[...]

  • Page 13

    13 Stopping the Engine and Tiller 1. T o stop the wheels and tines, release the Forward Clutch Bail (all models) or the Re- verse Clutch Control (Models 643B & 645A) — whichever control is in use. 2. T o stop the engine, put the ignition switch and/or the throttle control lever in the “OFF” or “STOP” position. OPER ATING THE TILLER Th[...]

  • Page 14

    14 Preparing Seedbeds Tilling wet soil often results in large, hard clumps of soil that can inter fere with plant- ing. If time permits, wait a day or two after heavy rains to allow the s oil to dry before tilling. T est soil by squeezing it into a ba ll. If it compresses too easily , it is too wet to till. Avoid Tilling Soggy, Wet Soil Whenever po[...]

  • Page 15

    15 Tilling On Slopes Read the following recommen dations before tilling on slopes: If you must garden on a moderate slope, please follow two ver y important guidelines: 1. Till only on moderate slopes, never on steep ground where footing is difficult (review safe - ty rules in Section 1 : Safety of this ma nual). 2. We recommend tilling up and down[...]

  • Page 16

    16 Terrace Gardening (continued ) • T o create a terrace, sta rt 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 walk ing below the terrace you’re preparing. For added stab ility of the tiller , always keep the u phill wheel in the soft, newly t[...]

  • Page 17

    17 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. Failure to follow these instructions can result in serious personal injury or property damage. NOTES 1 -[...]

  • Page 18

    18 4. The gear oil level is correct if the gear oil is approximately halfway up the side of the main drive shaft. 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. IMPORT ANT : Do not op erate the tiller if the gear oil level is low . Doing so will result in severe [...]

  • Page 19

    19 CHECKING AND ADJUSTING FORWAR D DRIVE BELT TENSION It is important to maintain correct tension on the forward drive belt. A loo se b elt wil l cause the tines and wheels to sl ow do wn — or stop completely — even though the en- gine is running at full speed. A too tight belt can result in u nintentional tine move- ment when the clutch bail i[...]

  • Page 20

    20 FORWARD CLUTCH BAIL ADJUSTMENT 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 T en- sion ). If this fails to correct the problem, contact T roy-Bilt LLC or your authorized dealer for service advice. CHECKING AND ADJUSTING RE- [...]

  • Page 21

    21 3. Clean around the oil dipstick or oil fill tube (whichever applies) to prevent dirt from falling into the crankcase. 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 dipst[...]

  • Page 22

    22 TROUBLESHOOTING PROBLEM POSSIBLE CAUSE CORRECTION Engine does not start 1. S park plug wire disconnected. 1. Reconnect wir e. 2. Engine Thr ottle Control Lever incorrectly set. 2. Put lev er in ST ART position. 3. F uel tank empty. 3. Add fuel. 4. C hoke control (if so equipped) in inco rrect position. 4. See Engine Owner’s Manual. 5. S tale g[...]

  • Page 23

    23 NOTES[...]

  • Page 24

    24 A A 11 43 45 48 42 39 6 24 49 47 39 9 14 10 44 13 5 7 7 19 9 3 20 21 2 12 18 46 7 30 26 6 17 7 8 15 37 38 35 29 34 36 27 23 25 28 24 40 4 16 22 33 32 31 1 4 41 4 Models 643C, 643B & 645A[...]

  • Page 25

    25 MODELS 643C, 643B & 645A REF NO. P ART NO. DESCRIPTION 1 686-04043 Tine Hood Assembly (A) 686-04041 Tine Hood Assembly (B) (C) 2 710-0395 Hex Screw, 5/16-18 x 2.25 3 710-0597 Hex Hd. Screw, 1/4-20 x 1 4 710-0599 Screw, Self-Tapping,1/4-20 x 1/2 5 710-0874 Hex Hd. Screw, 5/16-18 x 1-1/4 6 710-3008 Hex Hd. Screw, 5/16-18 x .75 7 712-04063 Hex [...]

  • Page 26

    26 MODELS 643C, 643B & 645A * Use as r equired to obtain betwee n .005” and .015” allowable end-play . REF NO. P ART NO. DESCRIPTION 1 GW-9517 Snap Ring 2 GW-1714 Bearing, Tapered Roller (with race) 3 GW-50043 Support Washer, Rear 4 711-04110 Drive Shaft 5 GW-1224-1* Shim, Rear Bearing Cap, .010" thick GW-1224-2* Shim, same as above, e[...]

  • Page 27

    27 MODELS 643C, 643B & 645A * Use as required to obt ain between .005” and .030” allowable end-play . REF NO. PA R T N O . D E S C R I P T I O N 2 1909950 Retainer, Snap Ring 3 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&qu[...]

  • Page 28

    28 MODELS 643C, 643B & 645A 22 37 17 15 27 20 47 23 29 8 37 17 32 27 15 20 6 26 1 10 1 4 16 18 43 11 15 9 37 24 38 3 44 19 27 14 13 40 45 12 46 34 21 48 44 23 5 23 39 48 99 36 32 6 3 44 33 28 35 31 2 26 33 28 35 22 31 30 7 2 42 36 42 18 43 11 41 38 30 A A Model 643C[...]

  • Page 29

    29 MODELS 643C, 643B & 645A REF NO. P ART NO. DESCRIPTION 1 736-0159 Flat Washer, 5/16 2 756-04198 Pulley, Engine Drive 3 656-04023 Transmission Pulley (A) 656-04005 Transmission Pulley (B) (C) 4 756-04169 Pulley, Reverse Idler (B) (C) 5 786-04095 Guard, Belts/Pulleys 6 754-04090 Forward Drive Belt 7 754-04091 Reverse Drive Belt (B) (C) 8 731-0[...]

  • Page 30

    30 NOTES[...]

  • Page 31

    31 NOTES[...]

  • Page 32

    TR O Y -BIL T TILLER LIFETIME LIMITED W ARRANTY WHAT PRODUCT All Troy-Bilt brand ed rear tine walk-behind tillers with gear drive transmissions. IS COVERED This warranty begins on the date of p urchase and is warranted by Troy-Bilt LLC for the life of the tiller, to the or iginal purchaser on ly. WHAT IS COVERED Troy-Bilt LLC will, at its option, r[...]