2021 Caterpillar 631K For Sale in San Antonio, TX

Online Owner's Manual

The Caterpillar 631K is a wheel tractor-scraper in Caterpillar's scraper lineup, designed for high-volume earthmoving, site preparation, and material hauling. It is commonly used in large-scale grading, road construction, mining, and land development applications. The 631K features a twin-engine configuration, articulated steering, and a bowl-and-ejector system for loading, transporting, and spreading material efficiently. As a self-loading scraper, it is built for moving soil, gravel, and other loose materials over moderate distances. The Caterpillar 631K is part of the K Series and is known for its production-focused design, operator controls, and integration with modern machine monitoring systems.