ANALYSIS OF THE FACTOR CAUSES REDUCED COMPRESSED AIR OUTPUT IN THE MAIN AIR COMPRESSOR ON BOARD MT SC GOLD OCEAN
POLITEKNIK ILMU PELAYARAN MAKASSAR
DOI:
https://doi.org/10.62391/ejmi.v7i2.165One of the most essential auxiliary systems on board a vessel is the main air compressor, which functions to support various mechanical and automation systems, particularly pneumatic systems that require a supply of high-pressure air. This compressed air is utilized for several critical operations, such as starting the main engine, starting auxiliary engines, operating pneumatic control systems, and supporting other related systems. Therefore, to ensure the smooth overall operation of the vessel, the performance of the main air compressor must consistently remain in optimal condition.
The primary objective of this study is to identify the causes of reduced air production in the main air compressor aboard MT SC GOLD OCEAN, one of the vessels operated by PT Soechi Lines Tbk. The author completed a sea-going practice (PRALA) for twelve months and five days (12 December 2023–17 December 2024). During this period, data were collected using several methods, including the USG method (Urgency, Seriousness, and Growth) to determine the priority level of the problems; direct observation during vessel operations; and literature review through manuals, engine journals, and other relevant technical references.
The findings indicate that the main air compressor did not operate under normal conditions. Many components experienced functional decline because their operational hours had exceeded the maximum recommended limit stated in the manual, which is 2,000 hours—this being the primary cause of the malfunction. Scale deposits were also found on the spring valve, preventing proper valve closure and resulting in ineffective compression. Furthermore, the piston rings suffered significant damage due to a clogged lubricating oil filter, which caused inadequate lubrication and excessive wear. This study is expected to assist readers, particularly engineering officers and engine room crew, in increasing their awareness of routine maintenance, complying with the Planned Maintenance System (PMS) schedule, and understanding the importance of adhering to manual instructions to prevent early-stage failures.
Keywords: Main Air Compressor
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