MUHAMAD, RAHMA DANI (2026) PERAWATAN DAN PERBAIKAN INJECTOR PADA MESIN INDUK KAPAL MERK YANMAR DI BENGKEL PT. CITRA BAHARI SHIPYARD TEGAL. KARYA TULIS.
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Abstract
The main engine of a ship serves as the primary propulsion system that determines the continuity of ship operations. The performance of the main engine is strongly influenced by the fuel system, particularly the injector, which functions to spray fuel into the combustion chamber at the specified pressure and timing. A decline in injector performance can result in suboptimal combustion, thereby affecting fuel efficiency and overall engine performance. Such performance degradation is generally caused by poor fuel quality, component wear, and maintenance activities that are not carried out regularly. Therefore, injector maintenance and repair need to be planned and conducted in accordance with established procedures. This scientific paper aims to examine the process of injector maintenance and repair on Yanmar main engines at PT Citra Bahari Shipyard Tegal and to evaluate their effect on engine performance. The method applied in this study is a descriptive method with a qualitative approach. Data collection was conducted through direct field observations, interviews with technicians, documentation of maintenance and repair activities, and a review of literature related to marine diesel engine fuel systems. The results of the discussion indicate that injector maintenance is carried out through component cleaning, inspection of operating conditions, and adjustment of injector opening pressure in accordance with applicable standards. Repair activities are performed when a decrease in injector function is identified that may affect the combustion process. The conclusion shows that routine and proper injector maintenance and repair are able to maintain combustion quality and keep the main engine performance in optimal condition. As a recommendation, injector maintenance should be implemented on a scheduled and continuous basis, supported by the use of clean fuel and systematic maintenance documentation. Keywords: Injector, Yanmar Main Engine, Maintenance and Repair
| Item Type: | Article |
|---|---|
| Additional Information: | 236102042 |
| Subjects: | Teknika |
| Divisions: | Program Studi > D3-Teknika |
| Depositing User: | AMNI Perpustakaan Semarang |
| Date Deposited: | 23 Apr 2026 01:52 |
| Last Modified: | 23 Apr 2026 01:52 |
| URI: | http://repository.unimar-amni.ac.id/id/eprint/6862 |
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