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p-Index From 2021 - 2026
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All Journal Journal of Innovation and Technology
Rizal Adi Saputra
Mechanical Engineering, University Of Lampung
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Advanced Failure Analysis of Hydraulic Systems in Volvo Articulated Haulers at Coal Mining Sites: Investigating Steering Cylinder Seal Failure and Brake Accumulator Degradation Syaipudin Anwar; Rizal Adi Saputra; Praise Prasetyo; Kristanto
Jurnal Inovasi Teknologi Vol 7 No 1 (2026): April
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

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The condition of hydraulic systems is critical to the productivity and safety of heavy equipment in coal mining operations. This study analyzes Hydraulic Systems in Volvo Articulated Haulers at coal mining sites in South Sumatra, Indonesia. Progressive failure of the steering cylinder seal on a Volvo ART A40F, manifested as hydraulic oil leakage and a drop in measured steering pressure from the standard 250 bar to 203 bar; and degradation of the brake accumulator unit on a Volvo ART A40G, causing a low brake pressure warning and a drop in pressure from the normal range of 145-245 bar to 118 bar. Both failures were caused by wear-induced mechanisms exacerbated by the harsh mining environment fine particle contamination, high thermal cycling, and continuous duty cycles. For the A40F, post-repair inspection revealed that the scraper / dust seal had thinned from 7.8 mm (new) to 6.1 mm, allowing the ingress of particles that accelerated piston rod seal wear. For the A40G, three of the seven accumulators had lost their hydraulic oil connections, reducing nitrogen precharge and eliminating pressure reserve capacity. Corrective interventions of seal kit replacement on the A40F and accumulator replacement on the A40G restored operating pressures to 250 bar and 247 bar, respectively. Maintenance records from 2024-2026 revealed that accumulator failures occurred repeatedly each year per unit, indicating inadequate inspection intervals. These findings support a transition to a condition-based maintenance strategy for both system types.
FRP Tank Scrubber Design Optimization Using ASME RTP-1 Standard for Biogas Power Plant: A Case Study of The Tapioca Mill in West Tulang Bawang, Lampung Fahrur Riza Priyana; Muhammad Fikri; Eko Wahyu Saputra; Rizal Adi Saputra
Jurnal Inovasi Teknologi Vol 7 No 1 (2026): April
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

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The tapioca processing industry in Indonesia holds massive potential for generating renewable energy through Biogas Power Plants. However, the high toxic and corrosive Hydrogen Sulfide gas content necessitates a reliable purification system. This study aims to design and validate the mechanical integrity and process feasibility of a Fiber Reinforced Polymer (FRP) composite Biological Scrubber tank. The case study was conducted at a facility with a 2000 Nm³/h gas flow capacity, utilizing a tank measuring 3.6 m in diameter and 15 m in height. A comprehensive evaluation was performed using an analytical approach and Python-based computational simulations referencing the ASME RTP-1-2023 standard for FRP pressure vessels. The tank design was optimized using a step-tapered wall configuration to withstand combined hydrostatic, internal pressure (0.05 kg/cm²), wind (22.68 km/h), and Zone 2 seismic loads. Volumetric analysis indicates the reactor dimensions provide an Empty Bed Residence Time of 275 seconds and a superficial gas velocity of 0.055 m/s, optimally maintaining the metabolic stability of the desulfurizing bacteria. Mechanically, the step-tapered wall thickness optimization (20 mm at the base to 10.5 mm at the top) achieved 25% material savings while maintaining a Safety Factor > 10, ensuring the design fully meets strict operational safety standards.
Co-Authors Eko Wahyu Saputra Fahrur Riza Priyana Kristanto Muhammad Fikri Praise Prasetyo Syaipudin Anwar