Atlas Copco’s XAS 750 JD7 Tier 4a rotary screw, portable compressor generates 750 cfm of free air delivery and 100 psi at normal working pressure. Powered by a 200-hp John Deere six-cylinder diesel engine, the XAS 750 JD7 is Tier 4a-compliant and designed for heavy-duty construction environments. With a fuel tank capacity of 78 gallons, the electronically controlled, water-cooled engine has fuel consumption of 8.2 gallons per hour at 100-percent load, a significant improvement over the previous model, the maker says. Offering 750 cfm of free air delivery at normal working pressure, the XAS 750 JD7 has an air receiver capacity of 16.7 gallons. The unit’s air end is designed to require less horsepower, resulting in better fuel efficiency.