Allis-Chalmers Crawlers: An Impressive Track Record

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

Allis-Chalmers H-3 and HD-3 crawlers (gasoline and diesel powered, respectively) were based on the Allis-Chalmers D-15 wheel-type farm tractor. Slightly larger than the smallest A-C crawler (the Model M), this pair nevertheless had many of the features of the larger stable mates such as multiple-disk clutch and brake packs.
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