Marmon - - Responsibilities: Removes, cleans, repairs, tests, and applies valves and fittings when required.; Disassembles and assembles fittings on tank cars.; Tests tank car, fittings, and valves to reveal possible defects.; Rebuilds tank car fittings and valves; tests them using specified methods.; Maintains stock levels of and issues tools, spare parts, safety equipment, and related repair and repair support items to production, maintenance, and other production support personnel.