Used Caterpillar 637D Scrapers For Sale

The Caterpillar 637D is a self-loading, twin-engine wheel tractor scraper used in earthmoving, road construction, and large-scale site preparation. As part of Caterpillar's scraper lineup, the 637D is designed for high-volume material loading, hauling, and spreading in medium to large grading operations. It typically features a bowl, apron, ejector, and rear push-pull capability depending on configuration. The machine is used for moving soil, gravel, and other loose materials over moderate distances. The 637D is recognized for its production-oriented design, serviceability, and compatibility with support equipment in mass excavation and highway construction applications.