ANALISIS KERUSAKAN PLUNGER BARREL TERHADAP KINERJA FUEL INJECTION PUMP PADA GENERATOR DI MV.TANTO NUSANTARA

Abstract

The smooth operation of a ship is highly dependent on the role of the generator, a machine that converts mechanical energy into electrical energy through the principle of electromagnetic induction according to Faraday's law. On MV. Tanto Nusantara, the generator serves to supply power for navigation equipment, auxiliary pumps, and domestic needs. This research focuses on the performance decline of diesel generator No. 1 (Daihatsu Diesel Yanmar), which was detected through a low exhaust gas temperature in cylinder No. 8 (260O C), indicating combustion failure. The purpose of this study is to analyze the causes of plunger barrel damage and fuel rack jamming in the Fuel Injection Pump (FIP). Using a descriptive qualitative method, data were collected through observation during overhaul, interviews with the Third Engineer, and a study of the engine's manual documents. The results of the study reveal that the damage to the plunger barrel was caused by the component's operating hours exceeding the limit (6,187 hours out of a maximum of 5,000 hours). Additionally, the accumulation of carbon residue caused the fuel rack mechanism to jam, resulting in suboptimal fuel supply. It is concluded that delays in the Planned Maintenance System (PMS) lead to a decrease in injection pressure and generator efficiency. The author suggests disciplined part replacement and routine cleaning to prevent fatal damage.