Rocker arms are actuated by hollow push rods socket-mounted in cam followers with solid, full floating, bronze bushings and hardened steel rollers and pins, pressure lubricated. Valves, rocker arms and push rods are lubricated from the engine pressure system. Camshaft, with integral cams, consists of two sections bolted together, with each section removable. Supported in split-type removable bearing shells, it is driven by a roller type chain. Maintains desired engine speed by controlling quantity of fuel delivered by the injection pumps.
Governor incorporates load regulator and low lube oil shut down device.
Shuts down engine when engine speed exceeds predetermined maximum speed setting. Fuel oil is supplied to the pumps by motor-driven fuel supply pump. Strainer is provided in suction line between tank and supply pump, cartridge type filter is located in pressure line between supply pump and injection pumps. A shut-off valve, manually operated from either the inside or outside of locomotive is supplied in the suction line to the supply pump. A fuel injection pump relief valve and a fuel supply pump discharge relief valve are provided.