The Cat 657 Wheel Tractor-Scraper (WTS) has a rated load of 52 tons and boasts a 7% increase in fuel efficiency over the 657G WTS. Its two-engine design includes the Cat C18 powering the tractor ...

The single engine Cat 651 Wheel Tractor Scraper (WTS) reenters the market with ... the new model shares the same bowl design and many components as the 657, allowing companies with mixed fleets ...