The Caterpillar 637 is a self-loading wheel tractor-scraper used in earthmoving, road construction, mining, and large-scale site preparation. As a scraper, it is designed to cut, load, haul, and spread material efficiently over medium to long distances. Caterpillar 637 models are typically equipped with a high-capacity bowl, apron, ejector, and tractor unit for moving soil, gravel, and other loose materials. The machine is commonly used in mass excavation and grading applications where high production and cycle efficiency are required. Caterpillar 637 scrapers are known for their heavy-duty construction, traction, and suitability for demanding off-road work.