A new forced-air motor and compressor cooling system is designed to provide the Oasis XD4000 Series air compressor with 100-percent duty-cycle at 200 pounds per square inch. A new on-board air compressor built for off-road vehicles, commercial trucks and air suspension systems, the 12-volt direct-current XD4000 air compressor features a deep-finned head, and a fan housing shroud into which a 100-cubic-feet-per-minute fan is built to cool the modified 5-horsepower motor.