Production | |
| Manufacturer: | Allis Chalmers |
| Type: | Standard-tread tractor |
| Factory: | West Allis, Wisconsin, USA |
| Total built: | 19,009 |
| 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. | |
Variants | |
| standard | |
| row-crop |
Allis Chalmers U Power | |
| Drawbar (claimed): | 20 hp 14.9 kW |
| Belt (claimed): | 31 hp 23.1 kW |
| Plows: | 3 (14-inch) |
| Drawbar (tested): | 30.37 hp 22.6 kW |
| Belt (tested): | 35.04 hp 26.1 kW |
Mechanical | |
| Chassis: | 4x2 2WD |
| Transmissions: | 3-speed |
| 4-speed | |
U Serial Numbers | |
| Location: | Rear of differential, near PTO |
| 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: | (none) |
| 1946: | (none) |
| 1947: | 18309, 20174 |
| 1948: | 18613, 20179, 21000 |
| 1949: | 20301, 210036, 22018 |
| 1950: | 20422, 22024 |
Engine Detail | |
| Continental | |
| gasoline | |
| 4-cylinder | |
| 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 |
Dimensions | |
| Length: | 118.5 inches 300 cm |
| Width: | 63.1 inches 160 cm |
| Height: | 53.5 inches 135 cm |
| Weight: | 4,600 lbs 2086 kg |