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Operator’s Manual
Rear-tine Tiller Models
®
630B—Tuffy
TM
634F—Bronco
TM
634B—Super Bronco
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-cov-
ered 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 maintai
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2 T ABLE OF CONTENTS Content Page Calling Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Features and Controls. . . . . . . . . . . . . . . .
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BRONCO 3 Section Safety 1 This machine meets voluntary safety standard B71.8 – 1996, which is sponsored by the Outdoor Reverse Clutch Power Equipment Institute, Inc., and is published Control (Models Forward Clutch Bail 634F/634B) by the American National Standards Institute. WARNING 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. Tine Hood Flap Safety Alert Symbol Standard-Rotatin
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4 Section 1: Safety 4. Exercise caution to avoid slipping or operating precautions to assist you in 24. Do not touch engine parts which may falling. maintaining control of the tiller: be hot from operation. Let parts cool down sufficiently. 5. If the unit should start to vibrate abnor- a. Walk behind and to one side of the mally, stop the engine, disconnect the tiller, using one hand on the han- 25. Please remember: You can always spark plug wire and prevent it from dlebars. Relax your arm, but
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BRONCO Section 1: Safety 5 Decals Reverse Clutch Control For your safety and the safety of Forward Clutch Bail Operating Instruction Operating Instruction others, various safety and opera- (Models 634F/634B) tional decals are located on your unit (see Figure 1-2). Keep the decals clean and legible at Starting Stabilization all times. Contact your local ser- Message (on engine) vice dealer or the factory for replacements if any decals are damaged or missing. Warning Messages Refer to the Par
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6 Section Assembly 2 ASSEMBLY STEPS WARNING STEP 1: UNPACKING INSTRUCTIONS To prevent personal injury or property damage, do not start the engine until NOTE: While unpacking, do not severely all assembly steps are complete and bend any control cables. you have read and understand the 1. The tiller weighs approximately 133 lbs. safety and operating instructions in this Do not attempt to remove it from the ship- manual. 1 1 ping platform until instructed to do so in these Assembly steps. 2. Remo
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Section 2: Assembly 7 K M O N L G H I A Fig. 2-3: Wheel in FREEWHEEL position (wheel drive pin through wheel shaft only). G I H STEP 4: INSTALL FORWARD CLUTCH CABLE E 1. Attach the forward clutch cable bracket G F (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. J I 2. Carefully unwrap the forward clutch H cable (cable without an attached knob) B from its shipping position and slide the C GG thin cable wire (T,
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BRONCO 8 Section 2: Assembly 4. Thread the #10-24 hex nut (Z, Fig. 2-5) halfway onto the screw (V). 5. Thread the screw (V) into the cable adjuster (X). 6. Hook the cable spring (W, Fig. 2-6) into the V-shaped bend in the Forward Clutch Z Bail (Y). X 7. Check for correct tension on the for- ward drive belt by taking two measure- ments of the cable spring, as follows: Hold bail against handlebar while a. With the Forward Clutch Bail (Y, Fig. 2- taking second measurement of spring 6) in an open
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Section 2: Assembly 9 STEP 6: CHECK LEVEL OF STEP 7: ADD MOTOR OIL TRANSMISSION GEAR OIL TO ENGINE The transmission was filled with gear oil at The tiller is shipped without oil in the the factory. However, you should check engine. the gear oil level at this time to make cer- IMPORTANT: Do not start the engine tain it is correct. without first adding motor oil. Severe IMPORTANT: Do not operate the tiller if engine damage will result if the engine is the gear oil level is low. Doing so will
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BRONCO 10 Section Features and Controls 3 Forward Clutch Bail WARNING Before operating your machine, care- fully read and understand all safety, controls and operating instructions in Reverse Clutch this Manual, the separate Engine Control (Models Owner’s Manual, and on the decals on 634F/634B) the machine. Failure to follow these instructions can Depth Regulator result in serious personal injury. Handlebar Height Adjustment INTRODUCTION This Section describes the location and function of the co
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Section 3: Features and Controls 11 results, always begin tilling at a very WARNING shallow depth setting and gradually A • Use extreme caution when reversing increase the tilling depth. or pulling the machine towards you. Look behind to avoid obstacles. WARNING D • Never attempt to till in reverse. • Do not attempt to till too deeply too Failure to follow this warning could quickly. Gradually work down to B result in personal injury or property deeper tilling depths. damage. • Place the Dep
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BRONCO 12 Section Operation 4 Reverse Clutch Control 1. Complete the Pre-Start Checklist on WARNING (Models 634F/634B) this page. Before operating your machine, care- 2. Put the wheels in the WHEEL DRIVE fully read and understand all safety position (see Wheel Drive Pins in Section (Section 1), controls (Section 3) and 3 of this manual). operating instructions (Section 4) in this Manual, in the separate Engine CAUTION Owner’s Manual, and on the decals on Forward Clutch Bail To help prevent s
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Section 4: Operation 13 4. For forward motion of the wheels and (b) Swing the handlebar to the left so the WARNING tines: right wheel takes a “step” backward. Next swing the handlebar to the right (a) Pull Forward Clutch Bail (Fig. 4-1) up so the left wheel “steps” backward. against handlebar. Release bail to stop Repeat as needed. forward motion of wheels and tines. (c) If longer distances need to be covered (b) When tilling, relax and let the wheels Keep away from rotating tines. Rotating
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14 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 WARNING causing the tiller to skip rapidly across the ground. (Sometimes, slight downward pressure Before tilling, contact your tele- on the handlebars will hel
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Section 4: Operation 15 TILLING TIPS & TECHNIQUES (cont.) Power Composting Power composting simply means tilling under and burying in the soil all manner of WARNING 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 nutri- When power composting, do not keep ents to the soil. the Depth Regulator Lever at a deep setting if the tiller jumps or bucks. The first place to begin is with
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16 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 1 across the first row as shown in Fig. 4-10. 2 3 • Each succeeding lower terrace is started by walking below the terrace you’re 12" UNTILLED preparing. For added stability of the tiller, always keep the uphill wheel in the soft, 1 REPEAT newly tilled soil. Do not till the last 12" or more of the downhill outside e
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17 Section Maintenance 5 If a cover is leaking, check for loose TILLER LUBRICATION WARNING screws. If the screws are tight, a new After every 10 operating hours, oil or Before inspecting, cleaning or gasket or oil seal may be required. grease the lubrication points shown in servicing the machine, shut off engine, If the leak is from around a shaft and oil Figure 5-1 and described below. wait for all moving parts to come to a seal, the oil seal probably needs to be Use clean lubricating oil (#3
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18 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 B. To Drain the Transmission Gear Oil: BOLO TINES oil is approximately halfway up the side of The transmission gear oil does not need to T
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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. Use pliers to prevent the adjuster (B) from turning and turn the slotted screw located inside the spring ENGINE clockw
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20 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. 5. Release the Reverse Clutch Control Replacement Belt Information FORWARD CLUTCH knob.and then unthread the inner jam nut If the drive belt needs to be replaced, see BAIL ADJUSTMENT
