2020 Caterpillar 621K For Sale in San Antonio, TX

Online Owner's Manual

The Caterpillar 621K is a wheel tractor-scraper in Caterpillar's 621 series, used for earthmoving, site preparation, and material hauling in construction, mining, and roadbuilding applications. It is a single-engine, open bowl scraper designed to load, carry, and spread soil, gravel, and other loose materials efficiently over medium to long distances. The 621K typically features a high-capacity bowl, rear push-pull capability, and operator controls designed for productivity and cycle consistency. Common uses include cut-and-fill operations, mass excavation, and large-scale grading projects. The model is part of Caterpillar's K-series scraper lineup, known for integrated powertrain and machine control systems.