Troubleshooting - Troy-Bilt 630B-Tuffy, 634F-Bronco, 634B-Super Bronco Operator's Manual

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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.
Before performing any troubleshooting procedures, refer to the appropriate safety, operating or maintenance instructions in this
Manual or in the Engine Owner's Manual. Contact your authorized engine service dealer for engine service. Contact your autho-
rized tiller dealer or the factory for all other service problems.
PROBLEM POSSIBLE CAUSE
Engine does 1. Spark plug wire disconnected.
not start. 2. Engine Throttle Control Lever incorrectly set.
3. Fuel tank empty.
4. Choke control (if so equipped) in incorrect position.
5. Stale gasoline.
6. Dirty air filter(s).
7. Defective or incorrectly gapped spark plug.
8. Carburetor out of adjustment.
9. Misadjusted throttle control.
10.Dirt or water in fuel tank.
Engine runs poorly. 1. Defective or incorrectly gapped spark plug.
2. Dirty air filter(s).
3. Carburetor out of adjustment.
4. Stale gasoline.
5. Dirt or water in fuel tank.
6. Engine cooling system clogged.
Engine overheats. 1. Engine cooling system clogged.
2. Carburetor out of adjustment.
3. Oil level is low.
Engine does not 1. Misadjusted throttle control or ignition switch.
shut off.
Wheels and Tines 1. Improper use of controls.
will not turn. 2. Worn, broken, or misadjusted drive belt(s).
3. Internal transmission wear or damage.
4. Bolt loose in transmission pulley.
Tines turn, but 1. Wheel Drive Pins not in WHEEL DRIVE.
wheels don't. 2. Bolt loose in transmission pulley.
3. Internal transmission wear or damage.
Wheels Turn, but 1. Tine holder mounting hardware missing.
Tines Don't. 2. Bolt loose in transmission pulley.
3. Internal transmission wear or damage.
Poor tilling 1. Worn tines.
performance. 2. Improper Depth Regulator setting.
3. Incorrect throttle setting.
4. Forward Drive Belt slipping.
The attachments listed below are available for your tiller. The information is the most current at the time this manual was printed.
Contact your authorized dealer or the factory for current information.
BUMPER – The tubular steel bumper surrounds the engine to protect the air cleaner, starter assembly and fuel tank from damage.
OEM-290-256 fits Tuffy, OEM-290-254 fit Bronco
FRAME WEIGHTS – Solid steel weights attach to the sides of the tiller frame to provide added traction to the wheels.
OEM-290-265 fits Tuffy, Bronco & Super Bronco

TROUBLESHOOTING

1. Reconnect wire.
2. Put lever in START position.
3. Add fuel.
4. See Engine Owner's Manual.
5. Drain fuel and add fresh fuel.
6. Clean or replace filter(s).
7. Inspect spark plug.
8. See Engine Service Dealer.
9. See Engine Service Dealer
10. See Engine Service Dealer.
1. Inspect spark plug (see Engine Owner's Manual).
2. Clean or replace (see Engine Owner's Manual).
3. See Engine Service Dealer.
4. Replace with fresh gasoline.
5. See Engine Service Dealer.
6. Clean air cooling system (see Engine Owner's Manual).
1. Clean air cooling area (see Engine Owner's Manual).
2. See Engine Service Dealer.
3. Check oil level (see Engine Owner's Manual).
1. See Engine Owner's Manual or Engine Service Dealer.
1. Review Sections 3 and 4.
2. See "Checking Drive Belt Tension," Section 5.
3 Contact local dealer or the factory.
4. Tighten bolt.
1. See "Wheel Drive Pins" in Section 3.
2. Tighten bolt.
3. Contact local Dealer or the Factory.
1. Replace hardware.
2. Tighten bolt.
3. Contact local Dealer or the Factory.
1. See "Bolo Tines" (Section 5).
2. See "Tilling Tips & Techniques," Section 4.
3. See Section 4.
4. See "Checking Forward Drive Belt Tension," Section 5.
TILLER ATTACHMENTS
CORRECTION