The Allis-Chalmers HD-20, last of A-C’s GM-powered Crawlers
A big tractor in its day, The Allis-Chalmers HD-20 was another part of the power struggle that took place between Allis-Chalmers and International-Harvester during the
Tag : the HD-20
Classic Machines: The Allis-Chalmers HD-20 tractor
In production for just three years, the HD-20 was the stepping stone between the powerful HD-19 and the very successful HD-21. RICHARD CAMPBELL delves into