Designed for the rugged and versatile demands of portable aggregate screening, the Scalper 77C portable screening plant features a 48-hp Yanmar diesel engine, a seven- by seven-foot double deck two bearing screen, a wide feed opening with low feed height as well as heavy-duty construction. The Scalper 77C is a patented, heavy-duty plant designed to screen sand, gravel, vegetation and more. These units work best when paired with a one- to two-yard loader. A nine-foot nine-inch feed screen opening and Smooth Start technology are standard equipment.