70th Anniversary of the Caterpillar Wheel Tractor-Scraper

October 29, 2020 The first Caterpillar wheel tractor-scraper, called the Caterpillar DW21, was manufactured for heavy construction contractors. It was Caterpillar’s answer to the LeTourneau “Tournapull,” the first-of-its-kind self-propelled scraper made in Peoria, Illinois, by former Caterpillar supplier, Robert LeTourneau.  The Caterpillar machine, unveiled at CONEXPO in Chicago in 1948, didn’t become available until September […]