Troy-Bilt 643B Super Bronco manual Troubleshooting, Problem Possible Cause Correction

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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

PROBLEM

 

POSSIBLE CAUSE

 

CORRECTION

 

 

 

 

 

Engine does not start

1.

Spark plug wire disconnected.

1.

Reconnect wire.

 

2.

Engine Throttle Control Lever incorrectly set.

2.

Put lever in START position.

 

3.

Fuel tank empty.

3.

Add fuel.

 

4.

Choke control (if so equipped) in incorrect position.

4.

See Engine Owner’s Manual.

 

5.

Stale gasoline.

5.

Drain fuel and add fresh fuel.

 

6.

Dirty air filter.

6.

Clean or replace filter.

 

7.

Defective or incorrectly gapped spark plug.

7.

Inspect spark plug.

 

8.

Carburetor out of adjustment.

8.

See Engine Service Dealer.

 

9.

Misadjusted throttle control.

9.

See Engine Service Dealer

 

10.

Dirt or water in fuel tank.

10.

See Engine Service Dealer.

 

 

 

 

 

Engine runs poorly.

1.

Defective or incorrectly gapped spark plug.

1.

Inspect spark plug (see Engine Owner’s Manual).

 

2.

Dirty air filter(s).

2.

Clean or replace (see Engine Owner’s Manual).

 

3.

Carburetor out of adjustment.

3.

See Engine Service Dealer.

 

4.

Stale gasoline.

4.

Replace with fresh gasoline.

 

5.

Dirt or water in fuel tank.

5.

See Engine Service Dealer.

 

6.

Engine cooling system clogged.

6.

Clean air cooling system (see Engine Owner’s Manual).

 

 

 

 

 

Engine overheats.

1.

Engine cooling system clogged.

1.

Clean air cooling area (see Engine Owner’s Manual).

 

2.

Carburetor out of adjustment.

2.

See Engine Service Dealer.

 

3.

Oil level is low.

3.

Check oil level (see Engine Owner’s Manual).

 

 

 

 

 

Engine does not shut off

1.

Misadjusted throttle control or ignition switch.

1.

See Engine Owner’s Manual or Engine Service Dealer.

 

 

 

 

 

Wheels and Tines will not turn

1.

Improper use of controls.

1.

Review Sections 3 and 4.

 

2.

Worn, broken, or misadjusted drive belt(s).

2.

See “Checking Drive Belt Tension,” Section 5.

 

3.

Internal transmission wear or damage.

3.

Contact local dealer or the factory.

 

4.

Bolt loose in transmission pulley.

4.

Tighten bolt.

 

 

 

 

 

Tines turn, but wheels don’t.

1.

Wheel Drive Pins not in WHEEL DRIVE.

1.

See “Wheel Drive Pins” in Section 3.

 

2.

Bolt loose in transmission pulley.

2.

Tighten bolt.

 

3.

Internal transmission wear or damage.

3.

Contact local Dealer or the Factory.

 

 

 

 

 

Wheels Turn, but Tines Don’t.

1.

Tine holder mounting hardware missing.

1.

Replace hardware.

 

2.

Bolt loose in transmission pulley.

2.

Tighten bolt.

 

3.

Internal transmission wear or damage.

3.

Contact local Dealer or the Factory.

 

 

 

 

 

Poor tilling performance.

1.

Worn tines.

1.

See “Bolo Tines” (Section 5).

 

2.

Improper Depth Regulator setting.

2.

See “Tilling Tips & Techniques,” Section 4.

 

3.

Incorrect throttle setting.

3.

See Section 4.

 

4.

Forward Drive Belt slipping.

4.

See “Checking Forward Drive Belt Tension,” Section 5.

 

 

 

 

 

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Contents Form no -02357A.fm 11/15/06Finding Model Number Table of ContentsCustomer Support Safety Alert Symbol Do not put hands or feet near or under rotating partsUse slower engine speeds Refer to the Maintenance sectionsKeep children and pets away Check all nuts, bolts, and screws forMaybeusedonthetillerandengine Operating SymbolsTo Avoid Serious Injury Introduction AssemblyAssembly Steps Inspect UnitInstall Forward Clutch Cable Use the handlebar to roll the tiller to a flat areaWhile preventing the cable adjuster from turning With the Forward Clutch Bail Y, FigCheck Transmission OIL Level Check all nuts and screws for tightnessAture package to identify the controls on your engine FreewheelTo operate the Forward Clutch Bail Travel Position Shallow SettingsTo adjust the handlebars Stop all tiller motion by releasing the Forward Clutch BailStarting and Stopping Following steps describe how to start and stop the engineIntroduction BREAK-IN Operation Change engine oilStopping the Engine and Tiller For forward motion of the wheels and power to the tinesOperating the Tiller To move the Model 643C in reverse for short distancesTilling Tips & Techniques Clearing the Tines Tilling Tips & Techniques CON’TTilling On Slopes Read the following recommendations before tilling on slopesLoading and Unloading the Tiller Terrace GardeningCheck Hardware Transmission Gear OIL ServiceTiller Lubrication Check Tire PressureBolo Tines Removing⁄Installing a Single TineRemoving⁄Installing a Tine Assembly Tine InspectionReplacement Belt Information Checking and AdjustingTo Check Forward Belt Tension Models 643B & 645A only Forward Clutch Bail AdjustmentEngine Cleaning AIR Cleaner Service Engine OIL Service To Check Reverse Belt TensionOFF-SEASON Storage Spark Plug ServiceSpark Arrester Screen Service To Change the Engine OilTroubleshooting Problem Possible Cause CorrectionPage 643C, 643D 645A Models 643B, 643C, 643D & 645A DescriptionGW-1224-3 Models 643B, 643C, 643D & 645A Models 643B, 643C, 643D & 645A 634-43203 Page Page TROY-BILT Tiller Lifetime Limited Warranty

643B Super Bronco specifications

The Troy-Bilt 643B Super Bronco represents a robust and versatile addition to the world of outdoor power equipment, designed with the needs of gardeners and landscapers in mind. This rear-tine tiller is a notable choice for those looking to cultivate their gardens efficiently and effectively.

One of the standout features of the Troy-Bilt 643B is its powerful 306cc OHV engine, which provides ample torque and ensures that the tiller can tackle tough soil conditions with ease. This engine is specifically designed for superior performance and reliability, allowing users to till effectively in a variety of soil types, from sandy loam to clay.

The tiller boasts a 12-inch tilling width and a tilling depth of up to 8 inches, making it ideal for preparing garden beds and landscaping areas. The adjustable tilling depth allows gardeners to customize their cultivation process, enabling them to penetrate deeper for planting larger crops or more shallow for seedbed preparation.

Equipped with a rear-tine design, the Super Bronco brings several advantages. The rear-tine configuration provides better control and stability while working, making it easier to maneuver in tight spaces. Furthermore, the counter-rotating tines help to break up compact soil while reducing the chances of soil clumping, resulting in a finer tilled surface.

Another remarkable feature is the Troy-Bilt patented "Smart Till" technology, which allows users to select the most suitable tilling method for their specific soil conditions. This innovative technology enhances efficiency, saves time, and ensures that the tiller delivers optimal results with every pass.

For ease of use, the tiller is equipped with large, easy-grip controls and a comfortable handlebar design that reduces fatigue during extended use. Additionally, the rugged construction and all-terrain tires enable the Troy-Bilt 643B to navigate challenging landscapes without issue.

The maintenance of the Super Bronco is user-friendly, with features that facilitate easy access to essential components for tune-ups and repairs. Overall, the Troy-Bilt 643B Super Bronco combines power, technology, and practicality, making it an excellent choice for both novice and experienced gardeners seeking to enhance their outdoor projects.
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