Allied Construction Products introduces the Hy-Ram HR Series hydraulic impact hammer. Hy-Ram has an oil and gas operation that increases efficiency, a longer piston stroke for higher impact power and an auto-stop system to prevent blank firing. Allied’s design of gas-assist using low-pressure nitrogenis designed to improve the efficiency by reducing demand on the carrier’s hydraulic system. There is no dependency on accumulators. In addition, pressurized oil is always present at the bottom of the piston to prevent internal cavitation.