Classic Machines: The Terex 82-20 crawler tractor Classic Machines

Classic Machines: The Terex 82-20 crawler tractor

Smallest of all the production Terex track type tractors, the 82-20 was designed to expand Terex’s market share of the crawler tractor business and take on it’s two main rivals in this class, Caterpillar and International-Harvester. By Richard Campbell Following in the footsteps of their successful C-6/82-30, 82-40 and TC-12/82-80...
Classic Machines: Caterpillar's big three-axle single, the 660 scraper Classic Machines

Classic Machines: Caterpillar's big three-axle single, the 660 scraper

With the arrival in New Zealand recently of a Caterpillar 660, the largest of Caterpillar’s single engined scrapers, it’s time we had a look at these extreme beasts in a little more detail. By Richard Campbell. Somewhat overshadowed by it’s legendary twin engined sibling, the Cat 666, it may surprise readers to know that there are...
Forgotten companies: Carco Classic Machines

Forgotten companies: Carco

Many of the readership will identify the name Carco as being associated with logging winches and forestry equipment. However, Carco’s roots go much further back in history to the dawn of the track-type tractor. By Richard Campbell Originally founded in 1905 in Seattle, Washington, Carco (originally known as the Seattle Car Company)...
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,...
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