Front | Troy-Bilt 643C Tuffy/Bronco, 645A Super Bronco specification

MODELS 643C, 643B & 645A

8

6

2

FRONT

11

3

4

7

5

(A)For Model 643C

(B)For Model 643B

(C)For Model 645A

10

9

7

4

3

2

	REF	PART NO.	DESCRIPTION
	NO.	PART NO.	DESCRIPTION
	NO.

	2	1909950	Retainer, Snap Ring
	3	GW-1166-1*	Shim, 0.062" thick
		GW-1166-2*	Shim, 0.030" thick
		GW-1166-3*	Shim, 0.015" thick
		GW-1166-4*	Shim, 0.010" thick
		GW-1166-5*	Shim, 0.005" thick
	4	GW-1086	Bronze Bushing
	5	711-04512	Wheel Shaft (A)
		711-04486	Wheel Shaft (B) (C)
	6	GW-9305	Key, Hi-Pro, 1/4 x 1
	7	GW-1132-2	Spacer
	8	1904278	Worm Gear, Wheel Shaft
	9	711-04078	Tiller Shaft
	10	GW-1104	Woodruff Key
	11	1916542	Worm Gear, Tiller Shaft

* Use as required to obtain between .005” and .030” allowable end-play.

27

Image 27

Troy-Bilt 643C Tuffy/Bronco, 645A Super Bronco manual Front

Contents

Operator’s Manual Table of Contents Finding Model NumberCustomer Support Do not put hands or feet near or under rotating parts Safety Alert Symbol Use slower engine speeds Refer to the Maintenance sectionsKeep children and pets away Starting the engine or engaging To Avoid Serious Injury Operating Symbols Inspect Unit AssemblyAssembly Steps Introduction 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 Safety Check all nuts and screws for tightnessOperation Ature package to identify the controls on your engine FreewheelFrom wheel drive shaft B Stop all tiller motion by releasing the Forward Clutch Bail Travel Position Shallow SettingsTo adjust the handlebars To operate the Forward Clutch Bail Change engine oil Following steps describe how to start and stop the engineIntroduction BREAK-IN Operation Starting and Stopping To move the Model 643C in reverse for short distances For forward motion of the wheels and power to the tinesOperating the Tiller Stopping the Engine and Tiller Tilling Tips & Techniques Read the following recommendations before tilling on slopes Tilling Tips & Techniques CON’TTilling On Slopes Clearing the Tines Terrace Gardening Loading and Unloading the Tiller Check Tire Pressure Transmission Gear OIL ServiceTiller Lubrication Check Hardware Tine Inspection Removing⁄Installing a Single TineRemoving⁄Installing a Tine Assembly Bolo Tines Checking and Adjusting Replacement Belt InformationTo Check Forward Belt Tension To Check Reverse Belt Tension Forward Clutch Bail AdjustmentEngine Cleaning AIR Cleaner Service Engine OIL Service Models 643B & 645A only To Change the Engine Oil Spark Plug ServiceSpark Arrester Screen Service OFF-SEASON Storage 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