Allis-Chalmers Manufacturing was a major force in big crawler tractors in the 1950s and early 1960s and no stranger to breaking records in the big tractor field. ... The 75-drawbar-horsepower Model L ...

Allis-Chalmers also built a D-21. Features on the 1960 D-17 include both a foot and hand clutch for any-speed baling. ... The ’68 D-17 a 4-cylinder has 48.64 drawbar hp, 52,7 belt hp.