Allis Chalmers
Allis Chalmers U
The Allis Chalmers U is a standard-tread farm tractor produced from 1929 to 1952 by Allis Chalmers in West Allis, Wisconsin, USA. A total of 19,009 units were built. It was available in standard and row-crop variants (U and UC). The tractor was equipped with several engine options including Continental 4.6L, Waukesha 4.9L, and Allis-Chalmers 5.2L 4-cylinder gasoline engines. Transmission options included 3-speed and 4-speed gearboxes, with the 4-speed offered on rubber-tired tractors. The U featured two-wheel drive and had a claimed drawbar power of 20 hp and belt power of 31 hp, with tested drawbar power reaching over 30 hp. It could pull 3 14-inch plows. The tractor weighed 4,600 lbs and had dimensions of approximately 118.5 inches in length, 63.1 inches in width, and 53.5 inches in height. Tires varied between steel and rubber agricultural sizes.
Power34 hp[B]
Founded1929 - 1952
ModelU
Technical Specifications
Detailed specifications and technical data for Allis Chalmers U
Power
| Plows | 3 (14-inch) |
|---|---|
| Belt (tested) | 35.04 hp (26.1 kW) |
| Belt (claimed) | 31 hp (23.1 kW) |
| Drawbar (tested) | 30.37 hp (22.6 kW) |
| Drawbar (claimed) | 20 hp (14.9 kW) |
Tires
| Ag rear | 42x11 steel, 12.75x24 |
|---|---|
| Ag front | 28x6 steel, 6.00x16 |
Engine
| Fuel tank | 24 gal (90.8 L) |
|---|---|
| Engine options | Continental 4.6L 4-cyl gasoline, Waukesha 4.9L 4-cyl gasoline, Allis-Chalmers 5.2L 4-cyl gasoline |
| Continental engine | 4-cylinder, gasoline, liquid-cooled, Displacement 283.7 ci (4.6 L), Bore/Stroke 4.25x5.00 inches (108 x 127 mm), Rated RPM 1200, Coolant capacity 20 qts (18.9 L) |
| Waukesha UM engine | 4-cylinder, gasoline, liquid-cooled, Displacement 300.7 ci (4.9 L), Bore/Stroke 4.375x5.00 inches (111 x 127 mm), Rated RPM 1200, Used beginning in 1932, tractor serial number 7405 |
| Allis-Chalmers UM engine | 4-cylinder, gasoline, liquid-cooled, Displacement 318 ci (5.2 L), Bore/Stroke 4.50x5.00 inches (114 x 127 mm), Rated RPM 1200, Final engine, available in 1936 (SN 12001) |
Variants
| U | standard |
|---|---|
| UC | row-crop |
Dimensions
| Width | 63.1 inches (160 cm) |
|---|---|
| Height | 53.5 inches (135 cm) |
| Length | 118.5 inches (300 cm) |
| Weight | 4,600 lbs (2086 kg) |
Mechanical
| Drive | Two-wheel drive |
|---|
Production
| Notes | Tractors fitted with factory steel wheels had a 3-speed gearbox, done by removing a shifter fork from the regular transmission. The U was also sold as the United Model U (1929-1931), and was distributed by the United Tractor and Equipment Corporation. United was a group of Fordson dealers who contracted Allis for a new tractor, once Ford stopped North American production of the Fordson. |
|---|---|
| Built in | West Allis, Wisconsin, USA |
| Total built | 19,009 |
| Manufacturer | Allis Chalmers |
| Years produced | 1929 - 1952 |
Transmission
| 3-speed | 3 forward and 1 reverse |
|---|---|
| 4-speed | 4 forward and 1 reverse, The four-speed transmission was offered on tractors equipped with rubber tires. |
| Transmission options | 3-speed, 4-speed |
Serial Numbers
| 1929 | 1 |
|---|---|
| 1930 | 1975 |
| 1931 | 6554 |
| 1932 | 7262 |
| 1933 | 7419 |
| 1934 | 7685 |
| 1935 | 8063 |
| 1936 | 9471 |
| 1937 | 12822 |
| 1938 | 14855 |
| 1939 | 15587 |
| 1940 | 16078 |
| 1941 | 16722 |
| 1942 | 17137 |
| 1943 | 17470 |
| 1944 | 17802 |
| 1945 | -unknown- |
| 1946 | -unknown- |
| 1947 | 18309, 20174 |
| 1948 | 18613, 20179, 21000 |
| 1949 | 20301, 210036, 22018 |
| 1950 | 20422, 22024 |
| Location | Rear of differential, near PTO |
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