Construction Equip Parts
Construction Equipment Brochure- Case- 450- Crawler Loader Price Comparison Vs Competition- appears to be for available options as well as base machines- Product Education Division- English Language- January
A bulldozer or dozer (also called a crawler) is a large, motorized machine that travels on tracks and is equipped with a metal blade to the front for pushing material: soil, sand, snow, rubble, or rock during construction or conversion work. When needed, a hook-like device (termed a ripper) can be mounted on the rear to loosen dense materials.