On-Site Magazine

Wheel tractor scraper

By Adam Freill   


Caterpillar’s single-engine Cat 651 Wheel Tractor Scraper (WTS) offers 33.6 m3 (44 yd3) heaped capacity and 46.4 tonnes (52 tons) rated load. Its features the Cat C18 engine, powering the tractor with 629 hp, and an eight-speed transmission that helps the scraper reach a top speed of 56.1 km/h.

The heating, ventilation and air conditioning system of the 651 is located below the cab, and the steering column and pedals have been positioned to help visibility. The scraper’s comfort seat rotates up to 30 degrees to the right for loading and offers an additional two inches of fore/aft movement. The seat’s adjustable armrest aligns with the implement control level with T-handle design for comfortable operation.

Three camera locations for the optional Work Area Vision System (WAVS) show the cutting edge, right side, and rear of the machine on a seven-inch in-cab colour display to improve visibility and jobsite safety. Available sequence assist reduces up to 14 individual operator commands per cycle with a single button for improved cycle consistency and fewer repetitive motions for the operator.

The unit’s auto-stall feature is designed to assist in warming up the transmission oil faster when working in colder ambient temperatures, so the machine is quickly ready for work. Configured with sequence assist, the new payload estimator option uses bowl lift cylinder pressure to accurately calculate machine payload to within five per cent of actual scaled weight, optimizing payload and jobsite efficiency.

A ground-speed control allows the operator to set the desired top speed, and the machine will find the gear that works best for the engine and transmission to lower engine load factor and fuel burn compared to top gear selection. When operating on a decline, the 651 detects a machine overspeed situation and automatically engages the compression brakes with no operator input. The unit is equipped with hydraulic wet disc brakes.

Cat’s Product Link with VisionLink interface collects critical machine operating data, including payload, that can be viewed online, connecting the office with the jobsite.



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