The Cougar DC Truck Vibrator from Cougar Vibration, a div. of Martin Engineering, is designed to improve the speed and efficiency of unloading vacuum trucks and other mobile equipment. Vibration helps achieve more payload per cycle and fewer cycles per job. The small, lightweight unit requires minimal space and uses a high-speed, low-amp 12- or 24-volt electric motor. Its weatherproof aluminum housing provides a high output-to-weight ratio. It is sealed against dirt, dust and water for long life in extreme conditions, and shielded, oversized, permanently lubricated ball bearings ensure reliable service life. It provides up to 3,200 pounds of vibratory force to improve the unloading of wet, sticky, fibrous or even frozen material. It is supplied with mounting hardware and electrical connections. 800/544-2947; www.martin-eng.com.