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Troy-Bilt 644A manual

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Table of contents for the manual

  • Page 1

    O m m 'w//////al&_Aiiiiiiiiiiiiir /m Operator's Manual ® Rear-tine Tiller Models 640C-- Tuffy _ CRT 644A m Super Bronco TM CRT Mode1644A 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 unim[...]

  • Page 2

    TABLE OF CONTENTS Content Page Content Page Customer Support 2 Maintenance 17 Safety 3 Off-season Storage 21 Assembly 6 Troubleshooting 22 Features and Controls 10 Parts List 23 Operation 12 Warranty Back Cover FINDING MODEL NUMBER This Operator's Manual is an important part of your new lawn tractor. It will help you assemble, prepare and main[...]

  • Page 3

    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 product contains chemicals known to the State of California to cause cancer, birth defects or other reprod[...]

  • Page 4

    4.Exercise caution toavoid slipping or fall- ing. 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 oftrouble. 6. Stop the engine, disconnect the spark plug wire and prevent it from t[...]

  • Page 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). Keepthe decals clean and legible at all times. Contactyour local service dealer or the factory for replacementsif any decals are damaged or missing. Referto the Parts List pages in this Manual for decal locations, desc[...]

  • Page 6

    SECTION 2: 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 instructions in this manual. INTRODUCTION Carefully follow these assembly steps to correctly prepare your tiller for use. It is recommended that you readth[...]

  • Page 7

    A J B °-! ° Fig. 2-3: Wheel in FREEWHEEL position STEP 4: INSTALL FORWARD CLUTCH CABLE 1. Carefully unwrap the forward clutch ca- ble (cable without an attached knob) from its shipping position and slide the thin ca- ble wire (T, Fig. 2-4) into the slot in the ca- ble bracket. Push the cable connector (U, Fig. 2-4) up through the hole in the brac[...]

  • Page 8

    4. Check for correct tension on the forward 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 Fig.[...]

  • Page 9

    5! 6: CHECK TRAHSMiSSiOH OIL LEVEL The transmission was filled with gear oil at the factory. However, you should checkthe gear oil level at this time to make certain it is correct. IMPORTANT: Do not operate 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 on level gr[...]

  • Page 10

    SECTION 3: FEATURES AND CONTROLS _ ARNING: Before operating your machine, carefully readand understand all safety, controls and operating instructions in this Manual, the separateEngine Owner's Manual,and on the decals on the machine. Failure to follow these instructions can result in serious personal injury. INTRODUCTION This Section describe[...]

  • Page 11

    _ WARNING: Use extreme _--'i_ caution when reversing or A Y pulling the machine towards ,,_- D you. Look behind to avoid obstacles. Never attempt to till in reverse. Failure to follow this warning could result in personal injury or property damage. To operate the ReverseClutchControl: 1. Put wheels in WHEELDRIVE position (see "WARNING&quo[...]

  • Page 12

    SECTION 4: OPERATION _ ARNING: Before operating your machine, 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. Failure to follow these instructions can result in serious personal injury. INTRODUCTI[...]

  • Page 13

    Stopping the Engine and Tiller 1. To stop the wheels and tines, release the Forward Clutch Bail (all models) orthe Re- verse Clutch Control (Model 644A) -- whichever control is in use. 2. To stop the engine, put the ignition switch and/or the throttle control lever in the "OFF" or "STOP" position. OPERATING THE TILLER The follow[...]

  • Page 14

    TILLING TIPS & TECHNIQUES Tilling Depths WAHNING: Before tilling, contact your telephone or utilities company and inquire if underground equipment or lines are used on your property. Do not till near buried electric cables, telephone lines, pipes or hoses. This is a CRT (counter-rotatingtine) tiller. As the wheels pull forward, the tines rotate[...]

  • Page 15

    TILLING TIPS & TECHNIQUES (CON'T) Tilling On Slopes Read the following recommendations before tilling on slopes: If you must gardenon a moderateslope,please follow two very important guidelines: 1. Till only on moderate slopes, never on steepground where footing is difficult (review safe- ty rules in Section 1: Safetyof this manual). 2. We[...]

  • Page 16

    TILLING TIPS & TECHNIQUES (CON'T) Terrace Gardening (continued) • To create a terrace, start 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 walking below the terrace you're O m_ preparing. For added stability of the tiller, always ke[...]

  • Page 17

    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. Failure to follow these instructions can result in serious personal injury or proper[...]

  • Page 18

    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. 4. The gear oil level is correct if the gear oil is approx[...]

  • Page 19

    ,_ 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. C FORWARD Figure 5-3: Instafl tines so that cutting e[...]

  • Page 20

    ,_ 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. FORWARD CLUTCH BAIL ADJUSTMENT If the Forward Clutch Ba[...]

  • Page 21

    ,_ 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. 3. Clean around the oil dipstick or oil fill tube (whic[...]

  • Page 22

    PROBLEM Engine does not start Engine runs poorly. Engine overheats. Engine does notshot off Wheels andTines will not turn Tines turn, but wheels don't, Wheels Turn, but Tines Don't, Poor tillingperformance. WARNING: Before inspecting, cleaning or servicing the machine, shut off engine, wait for all moving parts to come to a complete stop,[...]

  • Page 23

    1 :::3 n Parts List ;> % 15 I 14 2O m13 (A) For Model 640C (B) For Model 644A 12 9 7 24 REF PART NO. NO. 1 715-0108 2 710-0597 3 710-0599 4 710-0874 5 710-3008 6 712-04064 7 712-04063 8 1916707 9 736-0119 10 GW-55013-1 11 GW-55013-2 12 GW-55015 13 GW-55018 DESCRIPTION Spirol Pin Hex Hd. Screw, 1/4-20 x 1 Screw, Self-Tapping,I/4-20 x 1/2 Hex Hd. [...]

  • Page 24

    MODELS 640C & 644A 5 15 2O 17 22 I 16 12 18 6 14 18 23 24[...]

  • Page 25

    MODELS 640C & 644A REF NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 20 21 22 23 25 PART NO. DESCRIPTION 1916719 1916755 747-04210 1918745 710-0599 710-3008 712-3009 786-04188 GW-55043 786-04200 GW-55044 GW-9855 725-0157 736-3050 732-04040 732-04185 710-0106 710-0216 710-0805 712-0121 712-0291 712-3000 736-0119 Cable Assembly, Reverse Clutch[...]

  • Page 26

    MODELS 640C & 644A REF NO. 1 2 3 4 5 PART NO. DESCRIPTION GW-9517 GW-1714 GW-50043 711-04110 GW-1224-1 * GW-1224-2" GW-1224-3" GW-1224-4" GW-1325C Snap Ring Bearing, Tapered Roller (with race) Support Washer, Rear Drive Shaft Shim, Rear Bearing Cap, .010" thick Shim, same as above, except .030" thick Shim, same as above[...]

  • Page 27

    MODELS 640C & 644A FRONT I 11 3 4 1 2 .,J (A) For Model 640C (B) For Model 644A REF NO. 1 2 3 4 5 6 7 8 9 10 11 * Use as 7 4 3 2 PART NO. DESCRIPTION GW-9512 1909950 GW-1166-1 * GW-1166-2" GW-1166-3" GW-1166-4* GW-1166-5" GW-1086 711-04088 711-04092 GW-9305 GW-1132-2 1904278 711-04078 GW-1104 1916542 Retainer, Snap Ring, "E&[...]

  • Page 28

    MODELS 640C & 644A 8 28 9 ! I11_ 7 1 19 , FORWARD 24 24 28[...]

  • Page 29

    MODELS 640C & 640A REF PART NO. NO. 1 736-0159 2 714-0139 1108841 3 1916351 4 656-04023 656-04005 5 1916535 6 1916652 7 1916657 8 1916658 9 1916660 10 1916724 11 1916725 12 1916726 13 1916794 14 1916795 15 1917326 16 1917746 17 1918731 18 1918744 19 710-0627 710-0117 20 710-0237 21 710-0376 DESCRIPTION Flat Washer, 5/16 Key, 3/16"x 2"[...]

  • Page 30

    MODELS 640C & 644A 3 TINE SHAFT 7_ 9 FORWARD 7 " REF NO. 1 2 3 4 5 6 8 9 10 PART NO. DESCRIPTION 710-0514 GW-50049-02 712-3000 710-0347 GW-50049-01 1915075 1916747 1917486 734-04162 734-04161 GW-9380 GW-9338 GW-1901 (A) For Model 640C (B) For Model 644A Hex Hd. Screw, 3/8-16 x 1, Grade 5 Single Bolo Tine - Left Hand Hex Lock Nut, 3/8-16 He[...]

  • Page 31

    NOTES 31[...]

  • Page 32

    TROY-BILT TILLER LIFETIME LIMITED WARRANTY WHAT PRODUCT IS COVERED All Troy-Bilt branded rear tine walk-behind tillers with gear drive transmissions. 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 Troy-Bilt LLC will, at its option, repair or [...]