Classic Machines: Euclid's Big Singles- The S-28 and S-32 Classic Machines

Classic Machines: Euclid's Big Singles- The S-28 and S-32

Designed to compete directly with the Caterpillar 651, the Euclid S-28, and later S-32 were the largest single engined overhung scrapers that the company ever manufactured, and as it turns out, also the rarest. By RICHARD CAMPBELL During the 1960s, there was a surge of interest in really big single engined motor scrapers. Projects...
Classic Machines: The Allis-Chalmers HD-19 revisited Classic Machines

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 ways and was the foundation on which the later, highly successful model HD-21 was based. By RICHARD CAMPBELL We first took a look at the Allis-Chalmers HD-19 back in...
Evolution of the Single Axle Scraper Classic Machines

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 this type of scraper has seen a resurgence within the last decade. By RICHARD CAMPBELL Developed from the early drag scrapers and designed as a utility land leveling tool, the single...
Classic machines: The scrapers of Curtiss-Wright Classic Machines

Classic machines: The scrapers of Curtiss-Wright

A company far better known for its aircraft such as the legendary Jenny, Kittyhawk, Tomahawk and Helldiver, plus a very successful line of aircraft engines, Curtiss-Wright also briefly had an earthmoving division. By RICHARD CAMPBELL. Curtiss-Wright entered the earthmoving business through the acquisition of the Wooldridge Corporation,...
Classic Machines: Caterpillar's D7 tractor -'the early years' Classic Machines

Classic Machines: Caterpillar's D7 tractor -'the early years'

The iconic Caterpillar D7 has been in continuous production in various versions since 1935. They have fought in three major conflicts – WWII, Korea & Vietnam - and are a strong testament to a product that really was “built for it” By RICHARD CAMPBELL The D7 owes it’s origins to the Caterpillar Diesel Fifty which was...
Forgotten companies: Bucyrus-Erie Classic Machines

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 wide range of tractor equipment that was popular through the 1930s to the middle 1950s which is now largely forgotten. By RICHARD CAMPBELL. The Bucyrus Foundry Company of Bucyrus,...
A more modern look at the Allis-Chalmers TS-200 motorscraper Classic Machines

A more modern look at the Allis-Chalmers TS-200 motorscraper

Although it was not an original Allis-Chalmers design, the model TS-200 motorscraper paved the way for a far more successful machine in Allis’ product line, the TS-260. By RICHARD CAMPBELL. We first took a look at the Allis-Chalmers TS-200 way back in 2003, and for the benefit of our newer subscribers and those who may have missed the...
Classic Machines: the LeTourneau Tournacranes Classic Machines

Classic Machines: the LeTourneau Tournacranes

While a great many of LeTourneau’s inventions were designed for earthmoving purposes, some of his creations had very practical applications elsewhere. By RICHARD CAMPBELL There is a very old saying “necessity is the mother of invention”. This is particularly relevant when describing the development of the Le Tourneau...
Classic machines: The Euclid S-12 scraper revisited Classic Machines

Classic machines: The Euclid S-12 scraper revisited

Intended as a larger version of the Euclid S-7 which had proved to be extremely popular, the Euclid S-12 never really fulfilled its obvious potential. By RICHARD CAMPBELL Back in the February 2006 issue of Contractor, we had a look at the Euclid S-12. The original article was quite short due to allocated space limitations and in the...
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