Allis-Chalmers Crawlers: An Impressive Track Record

Tracing the history of the Allis-Chalmers crawler and its parent companies.

The 1941 Allis-Chalmers Model WM (for “wide gauge track”). With the same engine as the Model U wheel tractor, the M was in the 30 hp class and weighed about 3 tons.
Photo by Andrew Morland