Allis-Chalmers DD grader of the 1950s. In the 1940s, Allis-Chalmers launched a new grader called the model 'D' to replace the former model 'W' tractor-mounted type at the lower end of its motor-grader ...

With a weight of 70 tons and boasting 524 horsepower, the HD-41 crawler tractor made headlines as the largest built up to that time. Allis-Chalmers gave at-tendees a taste of things to come at the ...

Harry Merritt, the general manager of the Allis-Chalmers Tractor Division, decided there was a large market for a row-crop tractor that could replace the horses being used on small farms. The popular ...