The Caterpillar 637 is a self-loading wheel tractor-scraper used in earthmoving, road construction, mining, and large-scale site preparation. It is designed to cut, load, haul, and spread material efficiently over medium to long distances. The 637 scraper is typically paired with a Caterpillar tractor unit and bowl assembly, providing high-capacity material handling for soil, gravel, and other loose aggregates. Known for its heavy-duty frame, large bowl capacity, and off-road mobility, the Caterpillar 637 is used in bulk excavation and grading applications where rapid cycle times and high productivity are required.