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Jurnal Teknologi dan Rekayasa Alat Berat (JTRAB)
Published by Universitas Gadjah Mada
ISSN : -     EISSN : 30464773     DOI : https://doi.org/10.22146/jtrab.v1i2
Core Subject : Engineering,
Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Jurnal Teknologi dan Rekayasa Alat Berat (Journal of Heavy Equipment Technology and Engineering) is a scientific publication journal in the field of management and maintenance of heavy equipments published by the Department of Mechanical Engineering, Vocational College, Gadjah Mada University. Issues are published twice every year. The scope includes predictive maintenance, failure analysis, monitoring systems for heavy equipment, dynamic analysis of heavy equipment, diesel engines, management systems and information on spare parts warehousing, management of heavy equipment use, engineering control of heavy equipment, and others. JTRAB accepts scientific papers in the field of management and maintenance of heavy equipment. Scientific papers can be in the form of Regular articles: high-quality original research reports with conclusions that represent significant advances in this field. Technical note: Short articles are technical in nature and produce useful new additions. Review article: comprehensive, detailed, literature review results on a topic research. The submitted manuscripts to JRTAB must have never been published to any other publishers.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 20 Documents
 1   2 
Optimalisasi Exhaust Brake pada Unit HINO 500 FM 260 JD untuk Menurunkan Potensial Lost Cost Unit Hauling M.Burhanudin; Harjono, Harjono; Prihadianto, Braam Delfian; Sugiyanto, Sugiyanto
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 1 (2025): JTRAB Volume 2, No 1, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i1.13196

Abstract

Based on field observations, the exhaust brake component on the Hino 500 FM 260 JD unit frequently experiences breakdowns. One of the primary causes of failure is the ingress of mud into the exhaust chamber, which disrupts the functionality of the component. This study aims to compare the performance of exhaust brake components with and without a protective cover to enhance their lifetime, analyze the failure rate, and calculate the potential lost cost associated with exhaust brake failures in hauling units. Data collection was conducted directly in the field, and protective covers were installed on three dump truck units in the hauling fleet. The test results indicate that when the exhaust brake component was used without a cover, 14 failures were recorded, whereas with the cover installed, only 4 failures occurred. These findings demonstrate that the protective cover significantly impacts the lifetime and failure rate of the exhaust brake component. Following the testing phase, a potential lost cost analysis was conducted, considering four cost variables: spare parts, production losses, operator costs, and mechanic costs.
Pembuatan TREPOS (Travel Protection System) Sebagai Upaya Penurunan Travel Dispatch pada Small Excavator Isyanto, Muhamad Sandi Isyanto; Sugiyanto, Sugiyanto; Bahiuddin, Irfan; Ismail, Andi Akhmad; Khaerudin, Arif; Muslih, Imam
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 1 (2025): JTRAB Volume 2, No 1, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i1.13665

Abstract

Excavators primarily perform digging, loading, and swinging operations, while travel operations are intended to support mobility within the work area and should not exceed the primary operations. The operational data of the PC210-10M0 excavator, accessed through KOMTRAX, was utilized in this study as part of Komatsu's monitoring service. The objective was to design, develop, and install a travel protection system (TREPOS) and analyze travel dispatch data as an indicator of travel operations. The TREPOS development process included system design, wiring diagram creation, assembly, installation, and system testing. TREPOS employs a Programmable Logic Controller (PLC) to process inputs and outputs. Its function is to provide an audible warning and reduce the engine speed to low idle if the travel operation exceeds 15 minutes. The PDCA method was used in travel dispatch data analysis as an evaluation tool for TREPOS development. Initial results indicated no reduction in travel durations exceeding 20 minutes, necessitating further improvements. The second installation showed a reduction in the number of travel durations exceeding 20 minutes from 13 to 8 occurrences.
Analisis Penyebab Kerusakan Transmisi Dump Truck LGMG CMT 96 DT 060-032 di PT ANSAF INTI RESOURCES Irsal Revanza; Surojo, Surojo; Harjono, Harjono; Prihadianto, Braam Delfian
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 1 (2025): JTRAB Volume 2, No 1, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i1.14179

Abstract

Dump truck LGMG CMT 96 is employed by PT Ansaf Inti Resources for overburden transportation, operating up to 22 hours per day. In the unit coded DT 060-032, a transmission failure was detected at 2,143.5 hours, significantly below the company's target of 20,000 hours. The symptoms of the failure included the activation of the transmission warning indicator, fault codes, excessive jolts during operation, transmission overheating, and gear shifting failures. This study identifies the primary causes of the failure through monitor checks, visual inspections, historical maintenance data, the Machine Inspection Program (PPM), the Lubricant Analysis Program (PAP), and transmission overhaul results. The applied failure analysis method revealed brittle fracture of the lock-up clutch and excessive clutch wear due to deformation, heat spots, and blue temper. Operational errors were concluded to be the main cause of the transmission failure, leading to clutch slip and the appearance of fault code F:191 S:8.
Analisa Crack Coil Spring Track Adjuster pada Undercarriage Excavator CAT 320GC Aldi Lavandida Utama; Santoso, Nugroho; Setyana, Lilik Dwi; Hendaryanto, Ignatius Aris
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 1 (2025): JTRAB Volume 2, No 1, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i1.15209

Abstract

Heavy equipment, such as excavators, plays a crucial role in infrastructure and mining projects. The demanding worksite conditions and production targets require excavators to maintain high productivity, which can lead to material failures. A critical failure observed in the CAT 320GC excavator was the fracture of the coil spring in the undercarriage system. Several factors can contribute to coil spring failure, including worksite conditions, material defects, inadequate maintenance, and operational errors. This study aims to identify the root causes of coil spring fracture by analyzing its mechanical properties. The research methodology includes chemical composition analysis, visual and microstructural examination, hardness testing, and impact testing. The findings indicate that material failure was primarily caused by corrosion on the surface, which accelerated the fracture process. Additionally, repeated excessive loads from track shoe movements contributed to fatigue failure. The coil spring material was identified as high-carbon steel, closely resembling the 51xx (Chromium Steels) type. The fracture exhibited brittle characteristics with a granular or crystalline pattern, and the average impact energy was measured at 0.1541 J/mm². The coil spring material demonstrated an average hardness of 522.83 VHN, confirming its high hardness but brittle nature. The microstructural analysis revealed a predominance of fine lamellar pearlite in the dark regions of the fractured area.
Analisis Kegagalan Material Patahnya Coil Spring pada Track Adjuster Excavator PC 78 Leo Adi Saputra; Santoso, Nugroho; Setyana, Lilik Dwi; Basuki, Budi
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 1 (2025): JTRAB Volume 2, No 1, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i1.15707

Abstract

One of the critical components of an excavator's undercarriage is the coil spring, which frequently breaks due to extreme working conditions, lack of routine maintenance, and material defects. This coil spring failure often occurs in the PC 78 excavator unit. The resolution of this issue requires an undetermined period of time. This problem can lead to decreased and suboptimal excavator productivity. The objective of this study is to identify the causes of coil spring fractures, evaluate its mechanical strength, and determine the type of material used. The methods applied include chemical composition analysis, microstructure examination, hardness testing, and impact testing. Visual observations indicate that the coil spring failure is caused by material fatigue, crack initiation, propagation, and final fracture characterized by beach marks and striations. Chemical composition analysis reveals the dominance of iron (Fe), carbon (C), chromium (Cr), and manganese (Mn), classifying the material as AISI 51xx steel. Microstructural examination shows a dominance of bainite, which contributes to the material's hardness. Vickers hardness testing indicates high hardness values consistent with the observed microstructure. Impact testing results suggest that the fractured specimen exhibits ductile behavior.
Analisis Kerusakan Track Adjuster Pada Excavator Kelas 20 Ton Anwari, Muhammad; Nugroho, Danuarta Adi; Rosyid, Fakih Aulia; Bagaskara, Pagi Singgamata; Wibowo, Tegar Taufik; Pratama, Bagus Ardyansyah Ilham; Krisnaputra, Radhian; Aisyah, Nyayu
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 2 (2025): JTRAB Volume 2, No 2, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i2.14600

Abstract

The track adjuster is an important component on the excavator wheel that serves to adjust the tension of the track chain and reduce drag on the front of the excavator unit. When the excavator wheels are active (loading or digging), the track adjuster becomes the main support, especially when moving. The undercarriage of the excavator has to deal with road or soil structure resistance as it is in direct contact with the surface. A wear and tear analysis of the track adjuster shaft on industry Y's excavator X revealed several problems: broken spring, track piston with scratches, leaking seal and rusted rod. Corrective measures involved replacing the damaged components with new ones. In addition, routine maintenance includes cleaning the unit to facilitate checking the undercarriage, especially the track adjuster. With proper maintenance, the life of these components can be extended and excavator performance optimized.
Sistem Integrasi (ISO 50001) Dengan Kombinasi Chi-Square Test Untuk Analisis Manajemen Penggunaan Energi Operasional Alat Berat Pada Perusahaan Terminal Pelabuhan Ramadhana, Ridho Rizky; Prayitno, Yosephus Ardean Kurnianto; Irfan Bahiuddin; Setyawan Bekti Wibowo; Sugiyanto
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 2 (2025): JTRAB Volume 2, No 2, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i2.14637

Abstract

Port terminal companies play an important role in the growth of international trade, with more than 85% of global cargo traffic transported via sea routes and ports. As international trade continues to grow in line with the increasing use of energy, it is necessary to implement energy management strategies to maximize energy utilization. An analysis of the energy management maturity level of a port terminal company based on ISO 50001, combined with a Chi-square test, was carried out to evaluate the actual use of fuel oil (BBM) in equipment. The results showed a maturity level value of ≥ 4 and a significant value in the Chi-square test, indicating an ideal condition for energy management in industrial companies. On the other hand, there is a fluctuating trend in the actual fuel oil usage ratio. This indicates that the company needs to regularly evaluate the alignment between managerial policy-making and actual field data, enabling the company to promptly address any deficiencies occurring on site.
Alignment Model of Expectations with Actual Lifetime of Mainpump Components on Heavy Equipment Febrianto, Anggi; Suef, Mokh; Saiful Hakim, Muhammad
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 2 (2025): JTRAB Volume 2, No 2, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i2.17694

Abstract

This research focuses on the importance of optimal machine performance in various industrial sectors, emphasising the reliability of each component as a crucial factor in maintaining productivity and operational efficiency. In this context, specific research was conducted to analyse the difference between the expected life of components and the actual life achieved in the field. There is a significant knowledge gap associated with the mismatch between expected and actual component life, potentially leading to unexpected increases in operating costs and decreases in efficiency. This study used survey methodology and linear regression analysis to evaluate the relationship between the expected and actual age of mainpump components on Komatsu PC200 units. The main results showed that the actual life of the components tended to be lower than the expected life, with an average gap of 3,257 hours, indicating the need for adjustments to maintenance and replacement strategies. The analysis also revealed that factors such as severe operational conditions and suboptimal maintenance methods contributed to this mismatch. The implications of this study point to the importance of implementing a more adaptive and data-driven maintenance strategy to improve operational efficiency and minimise unexpected downtime.
Pengembangan Sistem Monitoring Berbasis Internet of Things untuk Perawatan Berkala Kendaraan dan Alat Berat dengan Fitur Pelaporan Terintegrasi dan GPS Pratama, Handika Yoga; Surojo; M. Hilmi; Bahiuddin, Irfan
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 2 (2025): JTRAB Volume 2, No 2, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i2.18656

Abstract

This study aims to develop an Internet of Things (IoT)-based hourmeter monitoring system to improve the efficiency and accuracy of periodic maintenance for vehicles and heavy equipment. The system is designed to integrate with a website that enables real-time monitoring of operating hours, reporting, and maintenance notifications. Testing was conducted on one light vehicle and one heavy equipment unit over a period of four days. The developed system was able to accurately record operating time, provide maintenance notifications via alarms, and monitor the unit’s location and performance using GPS data. The test results showed that the system successfully recorded travel distance and average speed, with the light vehicle achieving 14.2 km and 11.9 km/h, while the heavy equipment recorded 1.98 km and 7.17 km/h. The integration of hourmeter monitoring and GPS features proved to enhance supervision effectiveness and maintenance schedule prediction, thus potentially reducing the risk of damage and downtime. This system offers an innovative solution that can be adopted in the heavy equipment industry to support more optimal maintenance management.
Evaluasi Pemilihan Generator DC Pada Sistem PLTA Portabel Skala Mikro Untuk Suplai Energi Alat Berat Di Daerah Terpencil: Studi Kasus Sungai Sumatera VIII Nugraha, Muhammad Noviansyah; Mutiara Putri
Jurnal Teknologi dan Rekayasa Alat Berat Vol 2 No 2 (2025): JTRAB Volume 2, No 2, 2025
Publisher : Department of Mechanical Engineering, Vocational College, Gadjah Mada University.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jtrab.v2i2.23499

Abstract

This study results in the performance of a DC generator in a portable hydroelectric power plant (PLTA) system designed using an Archimedes screw turbine. The main focus lies in the balance between the turbine's power capacity and the generator's ability to generate electrical energy efficiently. Based on the test results, there is a significant alignment between the theoretical power of the turbine (664.2 W) and the actual power produced by the generator (150 W). This evaluation aims to provide recommendations for selecting the right generator for a microhydro power plant system.

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