Tag : Wooldridge

Classic Machines

Early development of the ripper-it started with a ‘rooter’

Contrafed PUblishing
These days, most of us do not pay much attention to the ripper fitted to a dozer, loader or motor grader, but there is quite...
Classic Machines

Equipment Controls – the cable era

Contrafed PUblishing
caption: Another very popular LeTourneau PCU was the front mounted Model AN8, seen here fitted to a reasonably new Caterpillar D8-1H series. The tractor also has a...
Classic Machines

Earthfill Compaction – A Brief History

Contrafed PUblishing
Good compaction of fill is essential if you are to avoid subsidence. The Romans and Egyptians knew it and so did the so-called “primitive” tribes...
AtecoForgotten companies

Forgotten companies: Ateco

Contrafed PUblishing
Once the number one go-to organization for tractor rippers and a myriad of other useful attachments, the American Tractor Equipment Corporation (ATECO) enjoyed major success...
ContractorCurtiss-Wright

The scrapers of Curtiss-Wright

Contrafed PUblishing
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Forgotten companies

Forgotten companies: Bucyrus-Erie

Contrafed PUblishing
The Bucyrus-Erie Company was world famous for its range of face shovels, draglines, cranes and other mining and quarry equipment. However, it also made a...
Classic MachinesForgotten companies

Forgotten companies: Isaacson

Contrafed PUblishing
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...
Caterpillardual axleScrapers

Caterpillar’s DW21 scraper revisited

Contrafed PUblishing
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...
Contractor

The Mississippi Road Supply Company (M.R.S)

Contrafed PUblishing
Specialising in assembled machines, primarily for the US military, the Mississippi Road Supply Company (MRS) produced a range of motorscrapers including the monstrous Model 250,...