Rear-tine Tiller Models
Operator’s Manual
643C, 643D Tuffy / Bronco CRT 643B, 645A Super BroncoTM
Troy-Bilt LLC, P.O. BOX 361131 CLEVELAND, OHIO
Content
TABLE OF CONTENTS
FINDING MODEL NUMBER
CUSTOMER SUPPORT
Safety Alert Symbol
SECTION 1 SAFETY
Training
Preparation
c. Use slower engine speeds
Maintenance and Storage
Decals
Operating Symbols
maybeusedonthetillerandengine
TO AVOID SERIOUS INJURY
Loose Parts List
SECTION 2 ASSEMBLY
ASSEMBLY STEPS
Hardware bag contents
D G F E
STEP 4 INSTALL FORWARD CLUTCH CABLE
M M N
Fig. 2-4 Installing forward clutch cable bracket and cable
Flat Side
X while preventing the cable adjuster from turning
STEP 6 CHECK TRANSMISSION OIL LEVEL
Section 3 Features and Controls
STEP 7 ADD MOTOR OIL
STEP 8 CHECK HARDWARE
WHEEL DRIVE PINS
SECTION 3 FEATURES AND CONTROLS
WARNING Before
INTRODUCTION
Settings
HANDLEBAR HEIGHT ADJUSTMENT
To adjust the handlebars
FORWARD CLUTCH BAIL
1. Complete the Pre-Start Checklist on this page
Pre-Start Checklist
BREAK-IN OPERATION
STARTING AND STOPPING
Stopping the Engine and Tiller
OPERATING THE TILLER
Stopping the Tiller and Engine
Tilling Depths
TILLING TIPS & TECHNIQUES
Let the Tiller Do the Work
Avoid Making Footprints
Tilling On Slopes
TILLING TIPS & TECHNIQUES CON’T
WARNING Do not
Clearing the Tines
Terrace Gardening continued
LOADING AND UNLOADING THE TILLER
TILLING TIPS & TECHNIQUES CON’T
TRANSMISSION GEAR OIL SERVICE
SECTION 5 MAINTENANCE
MAINTENANCE SCHEDULE
PROCEDURE
C. Removing⁄Installing a Tine Assembly
B. Removing⁄Installing a Single Tine
BOLO TINES
B B A
Replacement Belt Information
CHECKING AND ADJUSTING
FORWARD
FORWARD DRIVE BELT TENSION
ENGINE CLEANING
FORWARD CLUTCH BAIL ADJUSTMENT
AIR CLEANER SERVICE
ENGINE OIL SERVICE
SPARK ARRESTER SCREEN SERVICE
SPARK PLUG SERVICE
THROTTLE LEVER ADJUSTMENT
CARBURETOR/GOVERNOR CONTROL ADJUSTMENTS
PROBLEM
TROUBLESHOOTING
POSSIBLE CAUSE
CORRECTION
Page
MODELS 643B
643C, 643D 645A
DESCRIPTION
MODELS 643B, 643C, 643D & 645A
DESCRIPTION
required hardware. A B C
MODELS 643B, 643C, 643D & 645A
Remove and discard when installing the transmission on tiller
DESCRIPTION
DESCRIPTION
FRONT
MODELS 643B, 643C, 643D & 645A
DESCRIPTION
MODEL 643B & 643D
MODELS 643B, 643C, 643D & 645A
MODEL 643C
Complete Wheel Assembly 13 x 5 x 6 C
Complete Wheel Assembly 10 x 2.75 A
MODELS 643B, 643C, 643D & 645A
DESCRIPTION
Page
Page
TROY-BILT TILLER LIFETIME LIMITED WARRANTY
TROY-BILT LLC, P.O. Box 361131, Cleveland, Ohio