Allis-Chalmers B-1 Specs ( 1961-1963 )
Overview
The Allis-Chalmers B-1 is a garden tractor manufactured by Simplicity in Port Washington, Wisconsin, between 1961 and 1963. It features a 7.25 hp Briggs & Stratton air-cooled gasoline engine paired with a shaft-driven 3-speed gear transmission. The tractor is configured with an open operator station, a 12-volt negative ground electrical system, and has a listed shipping weight of 600 lbs.
Ideal Applications
Engine and Power Rating:
The tractor is equipped with a 304cc Briggs & Stratton single-cylinder gasoline engine rated at 7.25 hp at 3600 RPM with an oil bath air cleaner.
Transmission and PTO Layout:
The mechanical system consists of a 3-speed gear transmission providing three forward and one reverse gear, supported by live front, mid, and rear PTOs.
Chassis and Attachment Specifications:
The unit features a 44-inch wheelbase and 6 inches of ground clearance, and it is listed as compatible with a 42-inch mid-mount mower deck.
Production
| Description | Garden tractor / Built in Port Washington, Wisconsin, USA |
|---|---|
| Distributor | Allis Chalmers |
| Manufacturer | Simplicity |
Engine
| Description | 7.25HP Briggs & Stratton 304cc 1-cyl gasoline |
|---|---|
| Fuel tank | 1.5 gal (5.7 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 3.00x2.625 inches (76 x 67 mm) |
| Description | Briggs & Stratton 19D / gasoline / 1-cylinder / air-cooled horizontal-shaft |
| Displacement | 304 cc (18.55 ci) |
| Oil capacity | 1.5 qts (1.4 L) |
| Power | 7.25 hp (5.4 kW) |
| Rated RPM | 3600 |
| Starter | electric |
| Starter volts | 12 |
Transmission
| Gears | 3 forward and 1 reverse |
|---|---|
| Transmission type | 3-speed gear |
| Type | shaft-driven gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering |
| Drive type | Two-wheel drive |
PTO
| Front PTO | live |
|---|---|
| Mid PTO | live |
| Rear PTO | live |
Electrical
| Battery volts | 12 |
|---|---|
| Ground | negative |
Dimensions & Tires
| Lawn/turf front | 4.80x8 |
|---|---|
| Lawn/turf rear | 6.00x12 |
| Ground clearance | 6 inches (15 cm) |
| Height | 37.3 inches (94 cm) |
| Length | 68 inches (172 cm) |
| Shipping weight | 600 lbs (272 kg) |
| Wheelbase | 44 inches (111 cm) |
| Width | 34.25 inches (86 cm) |
| Front tire | 4.80x8 |
| Rear tire | 6.00x12 |
| Weight | 600 lbs (272 kg) |
| Wheelbase | 44 inches (111 cm) |
Allis Chalmers B-1 attachments
| Description | 42" mid-mount mower deck |
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Links
| Description | Allis-Chalmers B-1: information, photos and old advertising literature at SimpleTractors.com |
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References
| Description | Service Manual B Series Tractors (9003453) published in 1976 |
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