Abstract. This research was conducted at PT. Yamatogomu Indonesia with a focus on the I49 Injection machine that experienced high downtime. The objective of the research was to analyze the causes of machine failure and design an appropriate maintenance strategy. The method used was Reliability Centered Maintenance (RCM) supported by Failure Mode and Effect Analysis (FMEA) and Logic Tree Analysis (LTA). The FMEA results identified five main failure modes with a total Risk Priority Number (RPN) value of 702. The top three modes, namely no heat or excessive heat, no vacuum motor pressure gauge indicator, and compound puller motor malfunction, contributed 76% of the total risk. Based on LTA, all failure modes were classified as evident and did not have a direct impact on safety, but could disrupt operations. The maintenance strategies implemented consisted of Condition Directed (CD), Time Directed (TD), and Failure Finding (FF), with the majority of actions (60%) being CD. These results can be the basis for developing a more effective maintenance schedule to minimize downtime and increase production efficiency.
