Operator’s Manual Rear-tine Tiller Models 630B—Tuffy® 634F—BroncoTM 634B—Super BroncoTM Model 634B Shown 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).
TABLE OF CONTENTS Content Page Calling Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Features and Controls. . . . . . . . . . . . . . . . . . . . .
Section 1 Safety This machine meets voluntary safety standard B71.8 – 1996, which is sponsored by the Outdoor Power Equipment Institute, Inc., and is published by the American National Standards Institute. Reverse Clutch Control (Models 634F/634B) Forward Clutch Bail WARNING BRONCO Depth Regulator The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.
Section 1: Safety 4. Exercise caution to avoid slipping or falling. 5. If the unit should start to vibrate abnormally, stop the engine, disconnect the spark plug wire and prevent it from touching the spark plug, and check immediately for the cause. Vibration is generally a warning of trouble. 6.
Section 1: Safety Decals For your safety and the safety of others, various 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.
Section 2 Assembly WARNING ASSEMBLY STEPS 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. STEP 1: UNPACKING INSTRUCTIONS INTRODUCTION 2. Remove any packaging material from the carton. Remove any staples from the bottom of the carton and remove the carton from the shipping platform.
Section 2: Assembly 7 K M O N L G I I H A Fig. 2-3: Wheel in FREEWHEEL position (wheel drive pin through wheel shaft only). G H STEP 4: INSTALL FORWARD CLUTCH CABLE E 1. Attach the forward clutch cable bracket (P, Fig. 2-4) to the handlebar support (A) with a 1/4"-20 x 1-1/4" hex hd. screw (R) and 1/4"-20 hex locknut (S). Tighten securely. G F J H I 2.
Section 2: Assembly 4 5 4. Thread the #10-24 hex nut (Z, Fig. 2-5) halfway onto the screw (V). 7. 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. 26) 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. 2-7) and remeasure the spring length.
Section 2: Assembly STEP 6: CHECK LEVEL OF TRANSMISSION GEAR OIL STEP 7: ADD MOTOR OIL TO ENGINE 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. The tiller is shipped without oil in the engine. IMPORTANT: Do not operate the tiller if the gear oil level is low. Doing so will result in severe damage to the transmission components. 1. With the tiller on level ground, pull the Depth Regulator Lever (FF, Fig.
Section 3 Features and Controls WARNING Forward Clutch Bail 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. Reverse Clutch Control (Models 634F/634B) BRONCO Failure to follow these instructions can result in serious personal injury.
Section 3: Features and Controls WARNING A • Use extreme caution when reversing or pulling the machine towards you. Look behind to avoid obstacles. D • Never attempt to till in reverse. Failure to follow this warning could result in personal injury or property damage. B C To operate the Reverse Clutch Control: Figure 3-3: FREEWHEEL position. WARNING Before starting engine, be sure that both wheels are in WHEEL DRIVE position. See Wheel Drive Pins for instructions.
Section 4 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. 1. Complete the Pre-Start Checklist on this page. 2. Put the wheels in the WHEEL DRIVE position (see Wheel Drive Pins in Section 3 of this manual).
Section 4: Operation WARNING Keep away from rotating tines. Rotating tines will cause injury. Stopping the Engine and Tiller 1. To stop the wheels and tines, release the Forward Clutch Bail (all models) or the Reverse Clutch Control (Models 634F and 634B) – 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.
Section 4: Operation TILLING TIPS & TECHNIQUES Tilling Depths • Avoid pushing down on the handlebars in an attempt to force the tiller to dig deeper. Doing so takes the weight off the powered wheels, causing them to lose traction. Without the wheels helping to hold the tiller back, the tines will attempt to propel the tiller – often causing the tiller to skip rapidly across the ground.
Section 4: Operation 15 TILLING TIPS & TECHNIQUES (cont.) Power Composting Power composting simply means tilling under and burying in the soil all manner of organic matter such as crop residues, leaves, grass clippings and cover crops. This material will decompose during the non-growing season and add important natural nutrients to the soil. The first place to begin is with crop residues such as leftover vines, stalks, stems and roots. Power compost these crop residues as soon as they finish bearing.
Section 4: Operation TILLING TIPS & TECHNIQUES (cont.) Terrace Gardening (continued) UPHILL • 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 preparing. For added stability of the tiller, always keep the uphill wheel in the soft, newly tilled soil. Do not till the last 12" or more of the downhill outside edge of each terrace.
Section 5 Maintenance TILLER LUBRICATION 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. After every 10 operating hours, oil or grease the lubrication points shown in Figure 5-1 and described below.
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. 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 approximately halfway up the side of the main drive shaft. 5. If the gear oil level is low, add gear oil as described next.
Section 5: Maintenance 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. Unhook the top of the spring from the Forward Clutch Bail. d.
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. Failure to follow these instructions can result in serious personal injury or property damage.
Section 5: Maintenance 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 (whichever applies) to prevent dirt from falling into the crankcase. 4.
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. Failure to follow these instructions can result in serious personal injury or property damage. TROUBLESHOOTING Before performing any troubleshooting procedures, refer to the appropriate safety, operating or maintenance instructions in this Manual or in the Engine Owner’s Manual.
Parts List 23 Models 634F, 634B and 630B DRAWING NO. 1 REF. No. 1 3 5 PART No. 710-0599 777S30649 1904572 1917594 6 7 8 8A 9 710-3039 712-3004A GW-55018 1185469 GW-9384 (A) For Model 630B (B) For Model 634F DESCRIPTION Hex Hd. Flange Screw, Self-Tapping, 1/4-20 x 1/2 ................................... Decal, Hood ....................................... Tine Hood (Incl. tine flap and Ref. 3) (A) ....................................... Tine Hood (Incl. tine flap and Ref. 3) (B) (C) ..................
Parts List Models 634F, 634B and 630B DRAWING NO.
Parts List Models 634F, 634B and 630B PARTS LIST - DRAWING NO. 2 REF. No. PART No. 1 GW-55104 1916996 2 3 4 5 6 7 8 9 10 11 12 13 14 15 777I20937 710-0805 710-0106 1901077 1917479 GW-9855 1916712 736-0119 712-3010 712-0291 1918745 710-0514 712-3017 736-3050 DESCRIPTION QTY. Upper Handlebar (Incl. Ref. 2) (A) ....... Upper Handlebar (Incl. Refs. 2 & 28) (B)(C) ........................................ Decal, Forward Clutch Bail .................. Hex Hd. Screw, 5/16-18 x 1-1/2 .......... Hex Hd.
Parts List Models 634F, 634B and 630B DRAWING NO. 4 REF. No. 1 2 3 4 PART No. GW-9512 1909950 GW-1166-1 GW-1166-2 GW-1166-3 GW-1166-4 GW-1166-5 GW-1086 (A) For Model 630B (B) For Model 634F (C) For Model 634B DESCRIPTION QTY. Retainer, Snap Ring, “E” Type........... Retainer, Snap Ring .......................... Shim, 0.062" thick ............................. Shim, 0.030" thick ............................. Shim, 0.015" thick ............................. Shim, 0.010" thick .....................
Parts List 27 Models 634F, 634B and 630B DRAWING NO. 5 REF. No. PART No. 1 2 GW-9727 1186328 5 5A 6 7 8 1916641 1918377 GW-50032 GW-9617 GW-9621 DESCRIPTION Plug, Transmission Oil Fill .................. Hex Hd. Flange Screw, 5/16-18 x 5/8, Grade 5 .......................................... Front Cover, Transmission .................. Rear Cover, Transmission................... Gasket, Housing Cover........................ Oil Seal, Drive Shaft ............................ Oil Seal, Wheel Shaft....
Parts List Models 634F, 634B and 630B DRAWING NO.
Parts List 29 Models 634F, 634B and 630B REF. No. PART No. 1 2 3 * 1917326 736-0119 4 5 6 7 710-0237 777S30653 1917128 710-0599 8 9 10 11 12 13 712-3010 GW-50027 1916795 GW-1138-2 GW-9301 GW-55035 1916531 1917746 710-0117 1916794 710-0805 1916652 1916726 710-0520 GW-9090 1918744 712-3000 14 15 16 17 18 19 20 21 22 23 DESCRIPTION QTY. Engine, Recoil Start............................. 1 Bracket, Belt Cover.............................. 1 Lock Washer, 5/16 ..............................
Parts List Models 634F, 634B and 630B DRAWING NO. 7 7, 8 LEFT SIDE RIGHT SIDE Hold Tine With Blunt End Toward You Left Hand Tine Right Hand Tine NOTE: Identify Left and Right sides of tiller by standing in operator position and facing direction of forward travel.
Parts List 31 Models 634F, 634B and 630B REF. No. 1 2 PART No. 710-3005 50049-01 3 4 ---- 712-3000 710-0347 GW-1901 5 50049-02 (A) For Model 630B (B) For Model 634F (C) For Model 634B DESCRIPTION QTY. Hex Hd. Screw, 3/8-16 x 1-1/4, Grade 5 16 Bolo Tine - Right Hand. Single tine used on left side of tiller. (Incl. two each Refs. 1 & 3) ....................................... 8 Hex Lock Nut, 3/8-16 ............................ 2 Hex Hd. Screw, 3/8-16 x 1-3/4 ..............
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 BY THIS WARRANTY Troy-Bilt LLC will, at its option, repair or replace any part found to be defective in material or workmanship without charge for parts and labor.
