Low-cost earthmoving with greater productivity and operating efficiency was the push behind Caterpillar’s newest addition, the Cat 657 Wheel Tractor-Scraper.
The field-proven machine features a twin-power design and a 7% increase in fuel efficiency over the preceding model, the 657G.
For a mine, that improvement means more material can be moved per unit of fuel consumed, as well as a greater onboard payload: 46.4 tonnes (52 tons), making it the largest open-bowl scraper in Cat’s line.
It also has a larger cab, offering the benefits of efficiency and comfort to an operator. Also, the machine’s on-the-go weighing through Payload Estimator offers 95% load accuracy, allowing those operators easier access to target loading goals.
Inside, the two-engine design includes the Cat C18 to power the tractor and a Cat C15 in the scraper. Both are compliant with US EPA Tier 4 Final/EU Stage V emissions standards. An APECS system (meaning Advanced Productivity Electronic Control System) gives better utilisation of engine power as well as torque, equating to greater material movement each shift.
Also key to the new release is a transmission that features Electronic Clutch Pressure Control, added to boost shift quality and fuel efficiency, and hydraulic disc brakes to improve braking performance and reduce maintenance.
When units work in colder climates, the unit’s Auto-Stall feature will bring the transmission to operating temperature at start-up rapidly. Ground Speed Control has the ability to lower fuel consumption by permitting operators to set a desired top speed and optimise operation.
“This new 657 is the next generation of ultra-class material moving systems,” said John Gerhold, wheel tractor-scraper application specialist for Caterpillar.
“It delivers improved productivity, safety and technology, which our customers can use to strengthen their business today – and it is equipped to grow with them to meet tomorrow’s requirements.”