Allis-Chalmers A Specs ( 1936-1942 )
Overview
The Allis-Chalmers Model A is a standard-tread farm tractor manufactured in West Allis, Wisconsin, between 1936 and 1942, with a total production of 1,225 units. It was equipped with either a 7.6L gasoline or an 8.4L distillate four-cylinder engine and a four-speed non-synchronized gear transmission. The tractor features an open operator station, manual steering, and steel 48x12.1 rear tires, with a total listed weight of 7,175 lbs.
Ideal Applications
Engine and Power Output:
The tractor is listed with early claimed ratings of 44 hp for the belt and 33 hp for the drawbar, providing enough power for four 14-inch plows.
Transmission and Mechanical Configuration:
This two-wheel drive model utilizes a non-synchronized gear transmission with four forward gears and one reverse, controlled via manual steering and contracting band brakes.
Belt Pulley Specifications:
The machine is equipped with a 13-inch diameter belt pulley that operates at 1000 RPM with a belt speed of 3160 ft/min.
Production
| Description | Standard-tread tractor / Built in West Allis, Wisconsin, USA |
|---|---|
| Manufacturer | Allis Chalmers |
| Total built | 1,225 |
Engine
| Aux. fuel | 1 gal (3.8 L) |
|---|---|
| Engine type | Allis-Chalmers 7.6L 4-cyl gasoline / Allis-Chalmers 8.4L 4-cyl distillate |
| Bore/Stroke | 4.75x6.50 inches (121 x 165 mm) / 5.00x6.50 inches (127 x 165 mm) |
| Compression | 4.4:1 |
| Description | Allis-Chalmers / gasoline / 4-cylinder / liquid-cooled / Allis-Chalmers / distillate / 4-cylinder / liquid-cooled |
| Displacement | 460.7 ci (7.6 L) / 510.5 ci (8.4 L) |
| Engine type | Allis-Chalmers 7.6L 4-cyl gasoline / Allis-Chalmers 8.4L 4-cyl distillate |
| Belt (claimed) | 44 hp (early) (32.8 kW) |
| Drawbar (claimed) | 33 hp (early) (24.6 kW) |
| Plows | 4 (14 inch) |
Transmission
| Gears | 4 forward and 1 reverse |
|---|---|
| Transmission type | 4-speed non-synchronized gear |
| Type | non-synchronized gear |
Mechanical
| Description | Manual steering / Manual contracting band brakes / Open operator's station. |
|---|---|
| Drive type | Two-wheel drive |
Dimensions & Tires
| Ag rear | 48x12.1 (steel) |
|---|---|
| Height | 66 inches (167 cm) |
| Length | 140 inches (355 cm) |
| Weight | 7175 lbs (3254 kg) |
| Width | 63 inches (160 cm) |
| Rear tire | 48x12.1 |
| Weight | 7175 lbs (3254 kg) |
A Serial Numbers
| 1936 | 25701 |
|---|---|
| 1937 | 25726 |
| 1938 | 26305 |
| 1939 | 26614 |
| 1940 | 26782 |
| 1941 | 26896 |
| 1942 | 26915 |
| Description | FAQ: How to read a serial number table. |
| Final | 26925 |
Belt Pulley
| Diameter | 13 inches (33 cm) |
|---|---|
| RPM | 1000 |
| Speed | 3160 ft/min (963.17 meters/min) |
| Width | 8.5 inches (21 cm) |
References
| Description | Build a Better Farm published in 1940, by Allis Chalmers |
|---|