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 ...

Dick Riggert tells how he got one of the world's largest dozers from 1950, the 140-hp HD19 Allis Chalmers. Find out where to see antique machines like this work in September. Aug 1, 2011 Dick Riggert ...

The International TD-24 was the world's largest crawler tractor when introduced in 1947. Ray Derr puts his beautifully restored unit through its paces at the 2000 convention of the Historical ...