Analisis Penyebab Kerusakan Transmisi Dump Truck LGMG CMT 96 DT 060-032 di PT Ansaf Inti Resources
IRSAL REVANZA, Surojo, S. T., M. Eng.
2024 | Tugas Akhir | D4 TEKNIK PENGELOLAAN DAN PERAWATAN ALAT BERAT
Dump
truck LGMG CMT 96 merupakan alat berat yang digunakan oleh PT Ansaf Inti
Resources untuk mengangkut material overburden dari titik muat menuju titik
pembuangan. Operasional unit dump truck ini mencapai 22 jam kerja sehari, yang
berpotensi menimbulkan kerusakan pada berbagai komponen jika tidak disertai
perawatan optimal. Pada unit dump truck LGMG CMT 96 kode DT 060 032, ditemukan
kerusakan pada sistem transmisi. Gejala yang teridentifikasi meliputi munculnya
warning indicator dan fault code pada dashboard, hentakan saat operasi,
overheating, perubahan warna oli transmisi, hingga kegagalan transmisi dalam
pergantian kecepatan. Kerusakan ini terjadi pada hours meter 2.143,5 jauh di
bawah target life time perusahaan yaitu 20.000 hours meter. Penelitian ini
bertujuan untuk mengidentifikasi penyebab utama kerusakan transmisi dump truck
LGMG CMT 96 dengan menggunakan data dari monitor check, visual check, data
historical maintenance, Program Pemeriksaan Mesin (PPM), Program Analisa
Pelumas (PAP), dan hasil overhaul komponen transmisi. Metode Applied Failure
Analysis (AFA) diterapkan dengan pendekatan prinsip keausan dan patahan logam.
Hasil analisis menunjukkan kerusakan pada coupling (lock up clutch) dengan
patah getas (brittle fracture) pada spring holder plate dan keausan berlebih
pada plate clutch yang mengalami deformasi, heat spot, dan blue temper yang
menyebabkan abrasive wear. Berdasarkan data performance test dengan ET Tools,
sampel ritase unit, dan jenis patahan pada coupling (lock up clutch)
disimpulkan bahwa kesalahan pengoperasian merupakan penyebab utama kerusakan
transmisi sehingga menimbulkan clutch slip dan fault code F:191 S:8.
Dump truck LGMG
CMT 96 is a heavy-duty vehicle utilized by PT Ansaf Inti Resources for
transporting overburden material from the loading point to the disposal point.
This dump truck operates for 22 hours daily, posing potential risks of damage
to various components if not accompanied by optimal maintenance. In dump truck
LGMG CMT 96 with unit code DT 060-032, transmission system damage was
identified. Symptoms observed included the appearance of warning indicators and
fault codes on the dashboard, jerks during operation, overheating, changes in
transmission oil color, and failure in gear shifting. This damage occurred at
2,143.5 hours meter, significantly below the company target lifetime of 20,000
hours meter. This study aims to identify the primary causes of transmission
damage in dump truck LGMG CMT 96 using data from monitor checks, visual
inspections, historical maintenance records, Engine Inspection Program (PPM),
Oil Analysis Program (PAP), and transmission component overhaul results. The
Applied Failure Analysis (AFA) method was employed, focusing on wear principles
and metal fracture analysis.The analysis revealed damage to the coupling
(lock-up clutch) characterized by brittle fracture on the spring holder plate
and excessive wear on the clutch plate, including deformation, heat spots, and
blue temper, leading to abrasive wear. Based on performance test data using ET
Tools, unit haulage samples, and the type of fracture on the coupling (lock-up
clutch), it was concluded that operational errors were the primary cause of
transmission damage, resulting in clutch slip and fault code F:191 S:8.
Kata Kunci : Dump truck, transmission, maintenance, clutch slip