Caterpillar 651 Scraper

Nov. 11, 2021

The 651 Caterpillar scraper replaces the Cat 651E self-propelled scraper, which has not been offered for 15 years. The single-engine Caterpillar scraper has a heaped capacity of 44 cubic yards and rated load of 52 tons. The updated scraper shares the same bowl design and many components as the Cat 657 scraper, allowing companies with mixed fleets to stock fewer repair parts and lower owning costs.

Advanced Productivity Electronic Control System (APECS) integrates the transmission and engine drivetrain to provide smooth and responsive shifts, according to the company. Its electronic clutch pressure control features advance shift control logic for smoother speed and directional shifts, while part throttle shifting controls transmission shifts for smoother shifting between gears. The shift torque management system carries higher torque through shift points.

Powered by a single Cat C18 engine at 629 horsepower, the scraper can work with a Cat D10 or D11 push dozer. It has an 8-speed transmission that can reach a top speed of 34.8 mph.  

The Cat 651 scraper has the same cab as the Cat 657. The HVAC system has been relocated to below the cab, and the steering column and pedal have been repositioned to improve visibility. The seat rotates up to 30 degrees to the right for loading and offers an additional 2 inches of fore/aft movement to reduce operating fatigue. The seat’s adjustable armrest aligns with the implement control level with T-handle design for more comfortable operation.  

The scraper’s new high-pressure steering system requires significantly less steering effort. Improvements to the hydraulics include an electrohydraulic implement system for improved multifunction capability and a short throw for the T-handle implement control. The Cat advanced ride management eliminates end-stroke events of the seat suspension cylinder.

Auto-stall assists in warming up the transmission oil faster when working in colder ambient temperatures. Configured with sequence assist, the new payload estimator option uses bowl lift cylinder pressure to accurately calculate machine payload to within +/- 5% of actual scaled weight, optimizing payload and job site efficiency. Using the bowl lift cylinder, the reliable payload estimator system requires no recalibration or operator interface.

Cat 651 Scraper Specs

  • Net power: 585 hp
  • Heaped capacity: 44 cubic yards
  • Rated load: 104,000 lb.
  • Weight loaded: 249,000 lb.
  • Top speed loaded: 34.8 mph