MODELS 643B, 643C, 643D & 645A

1 2

3

4

2 5

REF

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

2

 

 

 

1

 

GW-9727

Plug, Transmission Oil Fill

 

 

 

 

 

 

 

2

 

710-04049

Hex Hd. Flange Screw, 5/16-18 x 5/8,Gr. 5

 

 

 

 

 

 

 

 

 

7

 

6

 

 

 

 

3

 

736-0119

Lock Washer, 5/16

 

 

 

 

 

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

 

 

 

 

10

 

 

14

 

710-3008

Hex Hd. Flange Screw, 5/16-18 x 3/4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

 

 

 

 

*Included with transmission when purchased as an assembly only.

 

 

 

 

 

 

13

 

Remove and discard when installing the transmission on tiller.

 

 

 

10

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

 

 

 

 

 

 

 

26

Page 26
Image 26
Troy-Bilt 643B Super Bronco manual GW-1224-3

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.