Analisis Akar Penyebab Kerusakan Sprocket Pada Final Drive Excavator PC400LC-8R Di Operasi Kerja

Ismayanti, Ismayanti (2026) Analisis Akar Penyebab Kerusakan Sprocket Pada Final Drive Excavator PC400LC-8R Di Operasi Kerja. Sarjana (S1) thesis, Universitas Muhammadiyah Indonesia.

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Abstract

Failure of an excavator final drive system can lead to machine breakdown, resulting in reduced productivity and increased operating costs. This study aims to analyze the root cause of sprocket bolt failure in the Komatsu PC400LC-8R excavator and to provide recommendations for preventing similar failures in the future. The research employed a descriptive method with a failure analysis approach, including visual inspection, dimensional inspection, hardness testing, chemical composition analysis, cross-section analysis, undercarriage condition assessment, track tension evaluation, and root cause investigation using Fault Tree Analysis (FTA) and Failure Mode and Effect Analysis (FMEA).
The results showed that the sprocket bolt installation procedure had been performed in accordance with the manufacturer's specifications, and no abnormalities were found in the material hardness or chemical composition. Fractographic analysis indicated that the failure occurred through a fatigue fracture mechanism initiated at the first engaged thread and propagated progressively until final fracture occurred. Further investigation revealed that design changes in the final drive system increased the load acting on the sprocket bolt, resulting in a reduction of the shear safety factor and accelerating the fatigue process. Therefore, improving the design safety margin of the bolted joint, along with proper operational control and undercarriage maintenance, is necessary to enhance final drive reliability and reduce the risk of breakdown in the Komatsu PC400LC-8R excavator.
Keywords: failure analysis, sprocket bolt, final drive, Komatsu PC400LC-8R excavator, fatigue fracture, Fault Tree Analysis, Failure Mode and Effect Analysis.

Item Type:	Thesis (TA, Skripsi, Tesis, Disertasi) (Sarjana (S1))
Contributors/Dosen Pembimbing,NIDN Dosen bisa diakses di LINK https://bit.ly/NIDNdosenunismabekasi:	Contribution Contributors / Dosen Pembimbing NIDN UNSPECIFIED Rahmanto, Raden Hengki 0426018204 UNSPECIFIED Indrayani, Novi Laura 0410118401
Keywords / Kata Kunci:	failure analysis, sprocket bolt, final drive, Komatsu PC400LC-8R excavator, fatigue fracture, Fault Tree Analysis, Failure Mode and Effect Analysis.
Subjects:	Eksperimen Elektronik Manufaktur Panduan Studi Langsung Media dan Industri Kreatif Analisis Kelayakan Bisnis
Faculty:	Fakultas Teknik > Teknik Mesin S1
Depositing User:	Mrs Ismayanti Isma
Date Deposited:	12 Oct 2026 02:59
Last Modified:	12 Oct 2026 02:59
URI:	http://repository.umindonesia.ac.id/id/eprint/10606

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