Allis-Chalmers always had a good reputation for making reliable and versatile track type tractors, but its new HD-5 introduced in 1946 exceeded all expectations. By...
Developed directly from its model HD-20 (introduced 1951), the HD-21 featured among other things, one of the diesel engines from the recently acquired Buda Engine...
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...