The elevating scraper concept and the Cat J621
There has been some considerable debate over who exactly came up with the elevating scraper concept, Johnson or Hancock, as both companies were in Lubbock,...
Tag : Caterpillar J621
The Caterpillar J621 elevating scraper
A logical development of the Caterpillar J619, Caterpillar’s J621 elevating scraper was introduced in 1965. By Richard Campbell The Caterpillar J621 was a pairing of...