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Syahruddin, Syahruddin
Balikpapan State Polytechnic
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Rancang Bangun Spesial Tool Oil Seal Swing Motor Installer Komatsu PC2000-8 Syahruddin Syahruddin; Ilham Danu Saputra; Syaeful Akbar; Wahyu Anhar; Sadat N. S. Sidabutar
JURNAL ALAT BERAT Vol 3 No 2 (2026): Juli 2026
Publisher : Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jab.v3i2.50

Abstract

Penelitian ini membahas perancangan Special Tool Oil Seal Swing Motor Installer unit Komatsu PC2000-8 di PT. Petrosea. Permasalahan utama yang terjadi di lapangan adalah kesulitan dalam proses pemasangan oil seal pada swing motor karena ukuran komponen yang besar, posisi yang sulit dijangkau serta adanya tonjolan drive shaft assembly yang dapat mengganggu proses pemasangan. Kondisi ini menyebabkan pekerjaan dilakukan secara manual menggunakan batang besi bekas yang dipukul bergantian di sisi oil seal sehingga berpotensi menimbulkan pemasangan yang tidak presisi, kebocoran dini, bahkan kerusakan komponen. Pengumpulan data menggunakan metode observasi mencakup proses pengerjaan dan pemasangan oil seal pada swing motor. Dokumentasi yang meliputi foto-foto tentang pengukuran dimensi oil seal dan catatan teknis quality assurance dari pekerjaan yang dilakukan. Wawancara dengan supervisor dan mekanik senior. Hasil pengujian menggunakan special tool oil seal swing motor installer memberikan beberapa keuntungan dibandingkan metode manual sebelumnya, yaitu: kualitas pemasangan oil seal lebih presisi dan efisien. Produktivitas meningkat karena proses pemasangan lebih cepat. Risiko kerusakan dan ketidakpresisian pada oil seal berkurang. Secara keseluruhan, special tool yang dirancang ini memenuhi tujuan penelitian, yaitu membantu proses pemasangan oil seal agar lebih cepat, presisi, dan aman untuk digunakan pada perawatan swing motor unit Komatsu PC2000-8.
Bio-hybrid carbon fibre/OPFF epoxy composites: mechanical, interfacial, and thermal performance Randis Randis; Hadi Hermansyah; Syahruddin Syahruddin; Karmila Achmad; Yasmin Zulfati Yusrina; Devina Sanchia Samosir; Edi Wibowo; Rudianto Raharjo
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8587

Abstract

The development of sustainable lightweight composites with reliable structural integrity is important for transportation and construction applications. This study investigates a bio-hybrid sandwich composite comprising carbon fibre skins and Oil Palm Frond Fibre (OPFF) as a natural porous core, with emphasis on improving interfacial integrity through chemical modification. The primary objective is to evaluate the effectiveness of sequential NaOH and H₂O₂ treatment in enhancing mechanical performance, interfacial bonding, and thermal stability of the composite system. Hybrid composites were fabricated using an epoxy matrix, combining carbon fibre reinforcements with untreated and chemically treated OPFF cores in various fibre configurations. Mechanical properties were assessed under tensile, flexural, and impact loading, while interfacial morphology and thermal behaviour were examined using microscopy and thermal analysis. The results demonstrate that NaOH + H₂O₂ treatment improves composite performance, with treated unidirectional hybrids exhibiting the highest tensile and flexural strengths. Microscopic observations reveal a substantial reduction in fibre pull-out, debonding, and skin–core delamination, indicating enhanced interfacial integrity and more efficient load transfer. In addition, treated composites show improved thermal stability. The novelty of this work lies in demonstrating that chemically treated OPFF can function as a sustainable sandwich core, where improved interfacial bonding plays a decisive role in suppressing delamination and enhancing overall composite performance.
Co-Authors Akbar, Syaeful Ali Abrar Andi sri Irtawaty Arifa’i, Muhammad Armin Armin Ayi Tarya Basri Basri Basselo, Finencia Yoab Devina Sanchia Samosir Edi Wibowo Hadi Hermansyah Hadi Hermansyah, Hadi Hadiyanto Hadiyanto Ida Bagus Dharmawan, Ida Bagus Ilham Danu Saputra Karmila Achmad Marali, Aryati Muhaymin Nabil Nabil Nining Sari Ningsih Nining Sari Ningsih Randis Randis Randis Randis Rudianto Rudianto Sadat N. S. Sidabutar Syaeful Akbar TATI NURHAYATI Wahyu Anhar C Putra Yasmin Zulfati Yusrina Yusrina, Yasmin Zulfati