Classic Machines: The Caterpillar 639D elevating scraper
As in comedy, they say that timing is everything. Caterpillar introduced the model 639D just when the bottom was beginning to fall out of the...
Tag : Fiat-Allis
Classic Machines: The Allis-Chalmers HD-11 tractor
Designed as a replacement for an earlier tractor, the Allis-Chalmers HD-11 was a very worthy successor and was in production for over 25 years. By...