Operator’s Manual

Rear-tine Tiller Models

643C — Tuffy® / Bronco CRT

643B, 645A — Super BroncoTM

Model 645A Shown

IMPORTANT: READ SAFETY

RULES AND INSTRUCTIONS

CAREFULLY

PRINTED IN U.S.A.

P. O. Box 1386, 97 Kent Avenue, Kitchener, Ontario N2G 4J1

772C0845

(12/05)

Page 1

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Troy-Bilt 643C Tuffy/Bronco, 645A Super Bronco manual Operator’s Manual

Contents

Operator’s Manual Finding Model Number Table of ContentsCustomer Support Do not put hands or feet near or under rotating parts Safety Alert Symbol Keep children and pets away Refer to the Maintenance sectionsStarting the engine or engaging Use slower engine speeds To Avoid Serious Injury Operating Symbols Assembly Steps AssemblyIntroduction Inspect Unit Use the handlebar to roll the tiller to a flat area Install Forward Clutch Cable With the Forward Clutch Bail Y, Fig While preventing the cable adjuster from turning Check all nuts and screws for tightness SafetyOperation Freewheel Ature package to identify the controls on your engineFrom wheel drive shaft B To adjust the handlebars Travel Position Shallow SettingsTo operate the Forward Clutch Bail Stop all tiller motion by releasing the Forward Clutch Bail Introduction BREAK-IN Operation Following steps describe how to start and stop the engineStarting and Stopping Change engine oil Operating the Tiller For forward motion of the wheels and power to the tinesStopping the Engine and Tiller To move the Model 643C in reverse for short distances Tilling Tips & Techniques Tilling On Slopes Tilling Tips & Techniques CON’TClearing the Tines Read the following recommendations before tilling on slopes Terrace Gardening Loading and Unloading the Tiller Tiller Lubrication Transmission Gear OIL ServiceCheck Hardware Check Tire Pressure Removing⁄Installing a Tine Assembly Removing⁄Installing a Single TineBolo Tines Tine Inspection Replacement Belt Information Checking and AdjustingTo Check Forward Belt Tension Engine Cleaning AIR Cleaner Service Engine OIL Service Forward Clutch Bail AdjustmentModels 643B & 645A only To Check Reverse Belt Tension Spark Arrester Screen Service Spark Plug ServiceOFF-SEASON Storage To Change the Engine Oil Problem Possible Cause Correction TroubleshootingPage Models 643C, 643B & 645A Description Models 643C, 643B & 645A GW-1224-3 Front Model 643C Models 643C, 643B & 645A Page Page TROY-BILT Tiller Lifetime Limited Warranty