Abstract:
The cooling system plays an essential role in maintaining the main engine’s operating
temperature within a safe range. A pressure drop in the sea water cooling pump—from
the normal 3.5 bar to 2.0 bar—occurred on MV Logindo Overcomer, resulting in the fresh
water cooling temperature rising to 95°C. This study aims to determine the factors causing
the pressure decrease and to formulate appropriate maintenance strategies to keep the
main engine running reliably. The research applies a qualitative descriptive approach
through direct field observation, examination of engine log books and maintenance
reports, and assessment of the Planned Maintenance System (PMS).
Findings indicate that the pressure drop was driven by three main issues: erosion-induced
wear and deformation of the impeller, air intrusion caused by leakage in the suction line,
and irregular PMS implementation due to limited availability of critical spare parts such
as impellers and mechanical seals. Corrective actions taken included installing a new
genuine impeller, repairing the suction line by replacing gaskets and mechanical seals,
and reinforcing PMS execution supported by improved spare parts management.
After these measures were completed, pump pressure returned to 3.5 bar and cooling
temperatures stabilized between 75–85°C. The study highlights that consistent PMS
adherence, routine inspection of vital components, and sufficient spare parts supply are
crucial to ensuring stable sea water cooling pump performance and maintaining main
engine reliability.
