The 651 has rejoined the Cat^® Wheel Tractor-Scraper lineup. Delivering high levels of productivity, the 651 single engine earthmoving system is a wise choice on numerous large-scale projects by providing fast cycle times when working in lower grades and rolling resistance applications. First introduced into the Wheel Tractor-Scraper lineup in 1962, the 651 continues to uphold its legacy as one of the Cat^® signature machines. Its single engine power provides the ability to work with a Cat^® D10 or D11 push dozer, delivering ultra-fast load times and the ability to work in abrasive or rocky conditions. With improvements in productivity combined with enhancements in operator comfort and new safety features – Powered Access System and effective wet disc brakes – this machine offers high returns on investment and time.