Analisis Lifetime Dan Kebutuhan Spare Part Bucket Tooth Excavator Berkapasitas 200 Ton Menggunakan Distribusi Weibull

Eka Susilo Purnomo, Dr. Ir. Widia Setiawan, S.T., M.T.,IPM.

2026 | Tugas Akhir | D4 TEKNIK PENGELOLAAN DAN PERAWATAN ALAT BERAT

Komponen bucket tooth pada Excavator Berkapasitas 200 Ton di PT Bumi Suksesindo (PT BSI) merupakan bagian dari Ground Engaging Tools yang bekerja langsung bersentuhan dengan material tambang sehingga rentan mengalami keausan dan kegagalan. Penelitian ini bertujuan untuk menganalisis lifetime serta mengestimasi kebutuhan spare part bucket tooth pada unit EX2001 dan EX2002 berdasarkan data historis penggantian periode Mei–Desember 2025.

Metode yang digunakan adalah analisis keandalan dengan distribusi Weibull dua parameter melalui tahapan verifikasi data, data cleaning, perhitungan Time To Failure (TTF), uji kesesuaian distribusi, estimasi parameter Weibull, perhitungan Mean Time To Failure (MTTF), analisis reliability, failure rate, dan estimasi kebutuhan spare part.

Hasil penelitian menunjukkan bahwa EX2001 memiliki 13 data TTF valid dengan rata-rata 361,62 jam, sedangkan EX2002 memiliki 15 data TTF valid dengan rata-rata 346,80 jam. Nilai MTTF EX2001 sebesar 365,366 jam dan EX2002 sebesar 339,708 jam. Nilai parameter bentuk  pada kedua unit lebih dari satu, sehingga pola kegagalan termasuk kategori wear-out failure. Rekomendasi interval preventive maintenance adalah sekitar 300 jam operasi, dengan kebutuhan spare part sebanyak 6 buah bucket tooth untuk kedua unit pada interval tersebut.

The bucket tooth component on 200-ton class excavators at PT Bumi Suksesindo (PT BSI) is part of the Ground Engaging Tools (GET) system that operates in direct contact with mining materials, making it highly susceptible to wear and failure. This study aims to analyze the lifetime characteristics and estimate the spare part requirements of bucket teeth on excavator units EX2001 and EX2002 based on historical replacement data collected from May to December 2025.

The research employed reliability analysis using a two-parameter Weibull distribution. The analysis stages included data verification, data cleaning, Time to Failure (TTF) calculation, distribution goodness-of-fit testing, Weibull parameter estimation, Mean Time To Failure (MTTF) calculation, reliability analysis, failure rate evaluation, and spare part requirement estimation.

The results indicate that EX2001 has 13 valid TTF observations with an average lifetime of 361.62 operating hours, while EX2002 has 15 valid TTF observations with an average lifetime of 346.80 operating hours. The calculated MTTF values are 365.366 hours for EX2001 and 339.708 hours for EX2002. The estimated Weibull shape parameter ?  for both units is greater than one, indicating a wear-out failure pattern. Based on the reliability analysis, a preventive maintenance interval of approximately 300 operating hours is recommended. At this maintenance interval, the estimated spare part requirement is six bucket teeth for both excavator units.

Kata Kunci : bucket tooth, excavator, distribusi Weibull, MTTF, spare part