The G Series of the 613 Wheel Tractor-Scraper features several upgrades to its design, including increases in powertrain efficiency, rim pull, elevator speed and travel speed. The 613G has a 11-cu-yd capacity and is able to cut and fill, finish grade, stockpile and condition material. A new safety valve prevents accidental articulation when the operator is entering or exiting the cab while holding the steering wheel. Caterpillar; 309-675-1000; www.cat.com