Construction Equipment Guide
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The Caterpillar 621B is a wheel tractor-scraper used in earthmoving, site preparation, and large-scale grading applications. As part of Caterpillar's scraper lineup, the 621B is designed to cut, load, haul, and spread material efficiently over medium to long distances. It is commonly used in highway construction, mining support, land development, and bulk excavation work. The machine typically features a tractor unit paired with a scraper bowl for material handling. The 621B is recognized for its role in high-production earthmoving operations and remains a reference model in Caterpillar scraper equipment history.