... truck, bus and coach. Products include Air Brake Booster, Power Brake Booster, Clutch Booster, Governor Valve, Foot Brake Valve, Hand Control Valve ... , Sing/ Double Check Valve, Directional Control Valve, Gladhands, Safety Valve, Levelling Valve, Qucik Release Valve, Drain Cock ... -575-87659537 clutch booster (90mm) on heavy truck 642-03502