Optimization Strategy to Reduce Unplanned Low Power Engine Breakdowns on PC-2000 Units at PT Antareja Mahada Makmur

Low-power machine breakdowns that occur unplanned (unscheduled) on the PC-2000 unit are one of the main obstacles in maintaining operational efficiency in the workshop area of PT Antareja Mahada Makmur Jobsite Mifa Bersaudara. This study aims to identify the main causes and design optimization strategies to reduce the frequency of these events. The research methodology included analysis of historical damage data, technical inspection of the affected machine components, and evaluation of the quality of the fuel used. Based on the analysis, it was found that the use of B35 fuel (35% biodiesel) is one of the significant factors affecting engine performance, especially in the combustion system and fuel injection components. The implementation of preventive maintenance-based strategies, including increased frequency of fuel injection system inspections, replacement of vulnerable components, and use of fuel additives to improve combustion efficiency, reduced the frequency of breakdowns by 40% within three months of implementation. The results of this study emphasize the importance of mitigating the impact of B35 fuel use on engine performance through a planned maintenance approach. Recommendations include developing technical guidelines specific to biodiesel fuel use and training technicians to support more reliable operational sustainability.