Caterpillar Inc., Peoria, Ill., has introduced the new 657G wheel tractor-scraper with Acert technology, a new cooling system, an enhanced cab and easy service. The tandem-powered 657G wheel tractor-scraper (Circle 914) features the Cat C18 engine for the tractor and the Cat C15 engine for the scraper. The 657G incorporates a new cooling system that reduces clogging, the G-Series cab and controls for superior operator comfort and efficiency, enhanced service access and component changes that boost reliability and durability. The 657G replaces the 657E and is the largest in the line of eight Caterpillar wheel tractor-scrapers.