Troy-Bilt 645A Super Bronco, 643C Tuffy/Bronco manual GW-1224-3

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MODELS 643C, 643B & 645A

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2 5

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

	1	GW-9517	Snap Ring
	2	GW-1714	Bearing, Tapered Roller (with race)
	3	GW-50043	Support Washer, Rear
	4	711-04110	Drive Shaft
	5	GW-1224-1*	Shim, Rear Bearing Cap, .010" thick
		GW-1224-2*	Shim, same as above, except .030" thick
		GW-1224-3*	Shim, same as above, except .005" thick
		GW-1224-4*	Shim, same as above, except .062" thick
	—	GW-1325C	Shim Set (Incl. the following shims:
			two #1224-1, two 1224-2 & one #1224-4)

* Use as required to obtain between .005” and .015” allowable end-play.

1

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

			5	2				1		GW-9727	Plug, Transmission Oil Fill
				2				2		710-04049	Hex Hd. Flange Screw, 5/16-18 x 5/8,Gr. 5
								2		710-04049	Hex Hd. Flange Screw, 5/16-18 x 5/8,Gr. 5
7			6					3		736-0119	Lock Washer, 5/16
7								4		1918377	Rear Cover, Transmission


				4				5		1916641	Front Cover, Transmission
								6		GW-50032	Gasket, Housing Cover
								7		721-04030	Oil Seal, Drive Shaft
				6				8		721-04031	Oil Seal, Wheel Shaft
			8					9		619-04013	Transmission Housing Assembly
								10		721-04036	Oil Seal, Tine Shaft
								11		736-3008*	Washer, Flat, .344 x .750 x .120
								12		718-04008	Rear Bearing Cap
		8	9		11*			13		710-04048	Hex Hd. Flange Screw, 5/16-18 x 1
		8			10			14		710-3008	Hex Hd. Flange Screw, 5/16-18 x 3/4
					10


				12					*Included with transmission when purchased as an assembly only.
				12			13			Remove and discard when installing the transmission on tiller.
			10	3			13
			10	3
				14

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Contents Operator’s Manual Customer Support Table of ContentsFinding Model Number Safety Alert Symbol Do not put hands or feet near or under rotating partsStarting the engine or engaging Refer to the Maintenance sectionsKeep children and pets away Use slower engine speedsOperating Symbols To Avoid Serious InjuryIntroduction 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, FigOperation SafetyCheck all nuts and screws for tightness From wheel drive shaft B Ature package to identify the controls on your engineFreewheel To 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 InspectionTo Check Forward Belt Tension Checking and AdjustingReplacement Belt Information 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 Models 643C, 643B & 645A Models 643C, 643B & 645A DescriptionGW-1224-3 Front Model 643C Models 643C, 643B & 645A Page Page TROY-BILT Tiller Lifetime Limited Warranty