ANALISIS DOWNTIME ENGINE MOTOR GRADER XCMG GR3005T PRO MENGGUNAKAN METODE RELIABILITY CENTERED MAINTENANCE II (RCM II) DAN FAILURE MODE AND EFFECT ANALYSIS (FMEA)

Muhammad Arkan Adelard, Dr. Nyayu Aisyah, SST, M.T.

2025 | Tugas Akhir | D4 TEKNIK PENGELOLAAN DAN PERAWATAN ALAT BERAT

Engine system pada motor grader XCMG GR3005T Pro merupakan penyumbang downtime tertinggi, yaitu sebesar 687,87 jam dari total 2.088,33 jam downtime yang terjadi pada seluruh sistem, sehingga berdampak signifikan terhadap keandalan dan ketersediaan unit dalam operasional pertambangan. Untuk mengatasi permasalahan tersebut, penelitian ini bertujuan untuk mengidentifikasi mode kegagalan, menentukan komponen kritis, serta merumuskan tindakan pemeliharaan yang tepat. Metode yang digunakan meliputi Failure Mode and Effect Analysis (FMEA) untuk menghitung nilai Risk Priority Number (RPN) dan Reliability Centered Maintenance II (RCM II) untuk menentukan strategi perawatan melalui RCM II Decision Diagram. Berdasarkan data breakdown dan riwayat pemeliharaan periode Februari 2023 hingga November 2024, ditemukan 63 mode kegagalan pada 23 komponen engine, dengan Solenoid Fuel Supply Pump mencatat nilai RPN tertinggi sebesar 126. Empat komponen utama yang dikategorikan sebagai komponen kritis adalah Solenoid Fuel Supply Pump, Oil Pump, Fuel Supply Pump, dan Water Pump. Rekomendasi tindakan pemeliharaan yang disusun mencakup enam Scheduled On Condition Task dan dua Scheduled Discard Task, yang bertujuan untuk menurunkan downtime, meningkatkan keandalan sistem engine, serta mengoptimalkan ketersediaan unit.

The engine system of the XCMG GR3005T Pro motor grader is the largest contributor to downtime, accounting for 687.87 hours out of a total of 2,088.33 hours of system downtime. This significantly impacts the unit's reliability and availability in mining operations. To address this issue, the objective of this study is to identify failure modes, determine critical components, and formulate appropriate maintenance actions. The methods applied include Failure Mode and Effect Analysis (FMEA) to calculate the Risk Priority Number (RPN) and Reliability Centered Maintenance II (RCM II) to determine maintenance strategies using the RCM II Decision Diagram. Based on breakdown data and maintenance history from February 2023 to November 2024, a total of 63 failure modes were identified across 23 engine components, with the Solenoid Fuel Supply Pump recording the highest RPN of 126. Four main components were classified as critical: Solenoid Fuel Supply Pump, Oil Pump, Fuel Supply Pump, and Water Pump. The recommended maintenance actions include six Scheduled On Condition Tasks and two Scheduled Discard Tasks, aimed at reducing downtime, enhancing engine system reliability, and optimizing unit availability.

Kata Kunci : Downtime, RCM II, FMEA, Risk Priority Number (RPN), Motor Grader, Pemeliharaan.