2.5. Function of Component 2.5.1. F.O. Feed Pump The FO feed pump feeds fuel oil from the fuel tank to the fuel injection pump via the water separator and fuel filter. The trochoid FO feed pump, installed on the fuel injection pump side, is driven by the fuel camshaft via the bevel gear. This feed pump can feed high pressure fuel oil into the FO injection pump, but while the fuel oil inside the piping is empty due to shortage of gases, etc., the pump’s self-feeding performance is low. Accordingly, the manual priming pump with FO filter or solenoid pre-feed pump is used together. The feed pump failure causes the delivery pressure and volume to drop.
This, in turn, shortens the service life of the fuel injection pump and causes the pump to become faulty. Replace the feed pump assembly after 10,000 hours’ use as a standard. ① Pump case ② Pump cover ③ Inner rotor ④ Outer rotor ⑤ Shaft ⑥ Molded ring ⑦ Oil seal ⑧ Bevel gear ⑩ Drive pin ⑪ Relief valve ⑫ Spring ⑬ Seal washer ⑭ Relief plug ⑮ Bolt ⑯ C-ring ⑰ Bush ⑱ Thrust washer ⑲ Washer 18 FO feed pump FO feed pump