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## About the Allis-Chalmers U

Production of the Allis-Chalmers U Tractor started in 1929 and continued until 1952. Make sure you have access to your tractor serial number, because there is a chance that the Allis-Chalmers U parts you need depend on that serial number. Usually, the serial number is printed on the rear of differential, near PTO. That serial number is determined by the year of manufacturing, so for a 1929 model, it starts with 1, for a 1930 model it starts with 1975, for a 1931 model it starts with 6554, for a 1932 model it starts with 7262, for a 1933 model it starts with 7419, for a 1934 model it starts with 7685, for a 1935 model it starts with 8063, for a 1936 model it starts with 9471, for a 1937 model it starts with 12822, for a 1938 model it starts with 14855, for a 1939 model it starts with 15587, for a 1940 model it starts with 16078, for a 1941 model it starts with 16722, for a 1942 model it starts with 17137, for a 1943 model it starts with 17470, for a 1944 model it starts with 17802, for a 1945 model it starts with (none), for a 1946 model it starts with (none), for a 1947 model it starts with 18309, 20174, for a 1948 model it starts with 18613, 20179, 21000, for a 1949 model it starts with 20301, 210036, 22018, for a 1950 model it starts with 20422, 22024. The 3-point hitch is very reliable. It is also worth noting that the PTO.