HAFIZ, KHAIRIANDA AL (2025) ANALISIS LAJU UMUR PAKAI GEAR SHAFT MATERIAL STEAL PADA HOIST PUMP OHT 777 TIPE GEAR - WITH SHAFT ONE PIECE. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
This research aims to analyze the wear rate and predict the service life of the steel gear shaft on the OHT 777 hoist pump unit. The problem faced is excessive wear on the gear shaft which causes oil leaks in the hoist pump area, thus having an impact on increased downtime as well as significant maintenance costs. This research uses quantitative methods by collecting data in the form of direct measurements of gear shaft diameters from January to August 2024 as well as linear interpolation methods to predict diameter reduction until it reaches the critical limit. The research results show that the gear shaft wear rate is 0.000875 mm/day. The initial diameter of 44.66 mm decreased to 44.45 mm within 8 months of operation. Service life predictions using linear interpolation show that the diameter will reach a critical limit of 44.12 mm in July 2025, after operating for 540 days. Based on these results, it is recommended that the gear shaft be replaced before it reaches a diameter of 44.2 mm to prevent further damage and reduce unscheduled downtime. This research emphasizes the importance of implementing a predictive maintenance strategy based on wear rate and linear interpolation to increase operational efficiency and reduce the risk of component failure in the OHT 777 hoist pump system.. Keywords : Wear Rate, Service Life, Gear Shaft, Hoist Pump, OHT 777, Predictive Maintenance. Penelitian ini bertujuan untuk menganalisis laju keausan (wear rate) dan memprediksi umur pakai gear shaft material baja (steel) pada hoist pump unit OHT 777. Permasalahan yang dihadapi adalah keausan berlebih pada gear shaft yang menyebabkan kebocoran oli di area hoist pump, sehingga berdampak pada peningkatan downtime serta biaya perawatan yang signifikan. Penelitian ini menggunakan metode kuantitatif dengan pengumpulan data berupa pengukuran langsung diameter gear shaft dari Januari hingga Agustus 2024 serta metode interpolasi linear untuk memprediksi penurunan diameter hingga mencapai batas kritis. Hasil penelitian menunjukkan bahwa laju keausan gear shaft sebesar 0,000875 mm/hari. Diameter awal sebesar 44,66 mm menurun menjadi 44,45 mm dalam 8 bulan operasi. Prediksi umur pakai menggunakan interpolasi linear menunjukkan bahwa diameter akan mencapai batas kritis 44,12 mm pada Juli 2025, setelah beroperasi selama 540 hari. Berdasarkan hasil tersebut, disarankan agar penggantian gear shaft dilakukan sebelum mencapai diameter 44,2 mm untuk mencegah kerusakan lebih lanjut dan mengurangi downtime yang tidak terjadwal. Penelitian ini menegaskan pentingnya implementasi strategi perawatan prediktif berbasis wear rate dan interpolasi linear untuk meningkatkan efisiensi operasional serta mengurangi risiko kegagalan komponen pada sistem hoist pump OHT 777. Kata Kunci: Wear Rate, Umur Pakai, Gear Shaft, Hoist Pump, OHT 777, Perawatan Prediktif
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