Used Caterpillar 621K Scrapers For Sale

The Caterpillar 621K is a wheel tractor-scraper in Caterpillar's scraper lineup, designed for earthmoving, site preparation, and large-scale material transport. It uses a single-engine, open bowl scraper configuration with a rear push-pull arrangement for efficient loading and hauling in construction, mining, and roadbuilding applications. The 621K is part of Caterpillar's K Series and is known for integrated powertrain controls, operator visibility, and compatibility with high-production fleet operations. Typical uses include cut-and-fill work, mass excavation, and haul road development. The model is commonly referenced in heavy equipment inventories, rental fleets, and equipment specification databases.