ANALISA MENURUNNYA KINERJA MAIN AIR COMPRESSOR DI MV. LUMOSO ALAM

Abstract

This research aims to analyze the causes of decreased performance of the main air compressor on board MV. Lumoso Alam, as observed during sea practice. The main compressor, Tanabe H-64, with a maximum pressure of 25 bar and a capacity of 130 m³/h, encountered issues such as the mixing of lubricating oil with water and prolonged air charging time into the air bottle. These problems significantly affected the lubrication process and overall system efficiency. The research method applied was descriptive qualitative, involving direct observation, and technical documentation. It was found that a leak in the intercooler allowed cooling water to enter the lubrication chamber, resulting in foamy, milky-colored oil. This condition lowered the maximum air pressure from 30 bar to only 18 bar. Additionally, the air charging time, which should normally take ±10 minutes, increased to over ±30 minutes, delaying the ship's departure. Other contributing factors include clogged air filters, air line leaks, and worn piston rings. Solutions implemented included intercooler replacement, filter cleaning, air line inspection, and piston ring renewal. This study recommends regular maintenance, visual system checks, and crew training to detect early signs of compressor failure. The findings are expected to serve as practical references for cadets and ship engineers in addressing similar issues and maintaining optimal ship operation.