Profile: Hy-Air Co., Inc. offers hydraulic and pneumatic sales & service. Our products include 450Hp. pump/motor test stand, 32ft. hydraulic cylinder hone, complete machine shop, hydraulic cylinder test stand, and hydraulic cylinder service machine. Our overhead crane enables lifting & moving of heavy machinery around the shop. We serve industrial, construction, petroleum, forestry, agriculture, government, and transportation departments. We provide repair service to hydraulic pumps, motors, cylinders & valves.