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 ...

Back in the early 1950s, management at General Motors Corp. (GM) decided to enter the earthmoving-equipment manufacturing business. After all, the company already had suitable engines for earthmoving ...

Tracked tractors are widely recognised as being the best means of putting serious horsepower to the ground. They’re expensive to buy new, yet here in the UK we still lap them up – nearly 200 are sold ...