Profile: Carl M Cummings Mfg. Co. is a manufacturer of engine valves and a supplier of related components for large gas and diesel engines. We manufacture engine valves for ALCO, Caterpillar, EMD, Enterprise, GE, Waukesha, White Superior and other large engines. We make the Thompson valve seat grinder. We supply valve keepers, rotators, springs, lifters, rings, bearings, gaskets, bolts and related engine parts. We re-build or re-condition locomotive bull gears, EMD lash adjusters, bridge assemblies and water pump bushings and GE oil pressure relief valves.