Troy-Bilt 643B Super Bronco Ature package to identify the controls on your engine, Freewheel

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SECTION 3: FEATURES AND CONTROLS

WARNING: 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. Failure to follow these instructions can result in serious personal injury.

INTRODUCTION

This Section describes the location and function of the controls on your tiller. Refer to the following Section, Operation for de- tailed operating instructions.

Practice using these controls, with the en- gine shut off, until you understand the op- eration of the controls and feel confident with each of them.

ENGINE CONTROLS

Refer to the engine manufacturer’s Engine Owner’s Manual (included in the tiller liter-

Forward Clutch Bail

Reverse Clutch Control

 

 

(Models 643B & 645A)

 

Depth Regulator

 

Handlebar Height Adjustment

 

Wheel Drive Pin

 

(on each wheel)

Figure 3-1: Tiller features and controls. See separate Engine Owner’s Manual to identify engine controls.

ature package) to identify the controls on your engine.

IMPORTANT: The control for stopping the engine is located on the engine.

WHEEL DRIVE PINS

Each wheel is equipped with a wheel drive Klik pin (A, Figures 3-2 and 3-3) that se- cures the wheel to the wheel shaft (B). The wheels can be positioned in either a WHEEL DRIVE or a FREEWHEEL mode.

WARNING: Never allow either of the wheels to be in the FREEWHEEL position when the engine is running. Always put both wheels in the WHEEL DRIVE position before starting the engine.

Failure to comply could cause loss of tiller control, property damage, or personal injury.

Before starting the engine, put both wheels in the WHEEL DRIVE position by inserting the wheel drive pins through the wheel hubs and the wheel shaft, and secure with cotter pin. Doing so “locks” the wheels to the wheel shaft, causing the wheels to turn when either the

Forward Clutch Bail (all models) or the Re- verse Clutch Control (Models 643B & 645A) is engaged.

Use the FREEWHEEL mode only when the engine is not running. In FREEWHEEL, the wheel drive pins are placed only through the holes in the wheel shaft (not the wheel hubs), thus allowing the wheels to turn freely when you manually move the tiller.

To place the wheels in WHEEL DRIVE or

FREEWHEEL:

1.Stop engine, disconnect spark plug wire from spark plug and allow engine to cool.

WARNING: Do not place tiller on its side when changing wheel drive positions. Doing so could result in gasoline leaking from the fuel tank.

Failure to follow this instruction could result in personal injury or property damage.

2.Raise one wheel about one inch off the ground and place a sturdy support under the transmission.

3.Remove Clevis Pin and cotter pin (A, Figures 3-2 and 3-3) from wheel drive shaft (B).

A

D

B

C

Figure 3-2: WHEEL DRIVE position.

4.FOR WHEEL DRIVE MODE (Figure 3-2): Slide wheel outward and align holes in wheel hub (D, Figure 3-2) and wheel shaft (B). Insert Clevis pin (A) through wheel hub (D) and wheel shaft (B) and se- cure with Cotter Pin (C). Repeat with the other wheel and then remove the support from beneath the transmission.

5.FOR FREEWHEEL MODE (Figure 3-3): Slide the wheel inward and insert the Clev- is Pin (A, Figure 3-3) secured by the cotter pin (C) only through the hole in the wheel shaft (B). Repeat for the other wheel and then remove the support from beneath the transmission.

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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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