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 : Heil
Classic Machines: International-Harvester’s 495 PayScraper
A large brute of a motor scraper, the International-Harvester model 495 was the only three-axle, open bowl scraper ever offered by the Company and it
Classic Machines: The Allis-Chalmers HD-19 revisited
Allis-Chalmers led the charge for a bigger, higher horsepower track type tractor following World War Two. The resulting model HD-19 was a breakthrough in many
Evolution of the Single Axle Scraper
Grand-daddy of all the scrapers (apart from the horse-drawn, wheel-less Fresno type), the single axle scraper has a niche in the history of earthmoving and
Forgotten companies: Bucyrus-Erie
The Bucyrus-Erie Company was world famous for it’s range of face shovels, draglines, cranes and other mining and quarry equipment. However, it also made a
Classic Machines: International 2T-55 & 2T-75 PayScrapers
The late 1940s and early 1950s saw unprecedented growth in earthmoving projects worldwide with demand for new machinery at an all-time high. Some manufacturers were
Forgotten companies: Isaacson
Back in time when the track type tractor was still considered a new tool for earthmoving, there were dozens of companies offering attachments to outfit
Classic Machines: Caterpillar’s DW21 scraper revisited
Born of necessity, the Caterpillar DW21, the great granddaddy of all Caterpillar 2-axle scrapers, went on to become a very successful scraper for Cat and
Classic Machines: The International TD-24 tractor
As soon as material constraints were removed prior to the end of WW2 the major earthmoving machinery companies set about designing new equipment to cater
The history of the towed scraper
Before the motor scraper there was the towed scraper – one of the first types of bulk earthmoving equipment to be invented. RICHARD CAMPBELL looks