Wheel Tractor-Scrapers Home Construction New Equipment Cat Equipment Wheel Tractor-Scrapers Proudly serving New Jersey, eastern Pennsylvania, northern Delaware and Staten Island! Get a Quote Today Enable Javascript in your browser to allow sorting products 621 Partial Wheel Tractor-Scraper Tractor Engine Cat® C13 Flywheel Power 407 hp Note Meets U.S. EPA Tier 4 Final or EU Stage V emission standards, or equivalent to U.S. EPA Tier 2, or equivalent to U.S. EPA Tier 3 and EU Stage IIIA. View Full Specs 621 Wheel Tractor-Scraper Overall Shipping Height 13.22 ft Overall Width 11.75 ft Scraper Capacity 24 yd³ View Full Specs 631 Partial Wheel Tractor-Scraper Tractor Engine Cat® C18 Flywheel Power 570 hp Note Meets U.S. EPA Tier 4 Final or EU Stage V emission standards, or equivalent to U.S. EPA Tier 2, or equivalent to U.S. EPA Tier 3 and EU Stage IIIA. View Full Specs 651 Partial Wheel Tractor-Scraper Tractor Engine Cat® C18 Note Meets U.S. EPA Tier 4 Final or EU Stage V emission standards, or equivalent to U.S. EPA Tier 2, or equivalent to U.S. EPA Tier 3 and EU Stage IIIA. Gross Power 637 hp View Full Specs 651 Wheel Tractor-Scraper Tractor Engine Cat C18 Flywheel Power 469kW (629 hp) Net Power 469 kW/637 hp View Full Specs 657 Wheel Tractor-Scraper Tractor Engine Cat C18 Scraper Engine Cat C15 Flywheel Power 469kW (629 hp) / 353 kW (473 hp) View Full Specs 657 Wheel Tractor-Scraper Tractor Engine Cat C18 Scraper Engine Cat C15 Flywheel Power 469kW (629 hp) / 353 kW (473 hp) View Full Specs 657G Wheel Tractor-Scraper Top Speed 33.0 mph Wheelbase 36.08 ft Flywheel Power 447 kw (600 hp) / 337 kW (451 hp) View Full Specs