Project’s Detail

DESKRIPSI TUGAS AKHIR :
STUDI KASUS KERUSAKAN SILINDER LINER ENGINE PC 750-7 SE PT SAPTAINDRA SEJATI SITE ADARO
Abstrak (Abstracts)
In the Komatsu PC 750-7SE unit of P.T Sapta Indra Sejati Site Adaro occurred a problem, namely failure on the cylinder liner. This case study proposed to analyze kind of risk in the cylinder liner and to analyze cause of its failure after doing overhaul engine was found there is fracture on the cylinder liner wall until oil can mingle with coolant in that unit. One of troubles that occur in the cooling system namely engine oil mingled with coolant on engine, like occur on excavator unit PC 750-7 SE. Based on the writer did on the Job Training in P.T united Tractors Tbk Tanjung with customer is P.T Sapta Indra Sejati site Adaro. The unit was found and got engine overheating. After the first checking was done, there was an increasing level engine found and decreasing air radiator is too fast then when the drain is done on engine oil pan was found there was engine oil that mingled with coolant. This research used Non Destructive Testing (NDT) and visual cracking. This research was done at State Polytechnic of Balikpapan. Based on the result of visual checking after processing NDT can be concluded that the risk of cylinder liner was cracking, cracking shaped fracture that have not plastic deformation until have brittle fracture. Failure in the cylinder liner was caused by engine overheating and submitted suggestion in this case study is Scanning Electron Microscopy (SEM) testing is needed to see micro-structured. Pada unit Komatsu PC 750-7SE PT Safta Indra Sejati Site Adaro terjadi permasalahan yaitu kegagalan pada cylinder liner. Studi kasus ini bertujuan untuk menganalisa jenis kerusakan pada cylinder liner dan menganalisa penyebab kegagalan. Setelah dilakukan overhaul engine ditemukan adanya fracture pada dinding cylinder liner sehingga oil bercampur dengan coolant di unit tersebut. Salah satu trouble yang terjadi pada cooling system yaitu engine oil bercampur dengan coolant pada engine, seperti yang terjadi pada unit Excavator PC 750-7 SE. Berdasarkan penulis melakukan On the Job Training di PT. United Tractors Tbk Tanjung dengan customer PT. SaptaIndra Sejati site Adaro ditemukan unit mengalami engine overheating. Setelah dilakukan pemeriksaan awal ditemukan adanya penambahan level engine oil dan pengurangan air radiator yang begitu cepat. Kemudian saat dilakukan drain pada engine oil pan ditemukan adanya engine oil yang bercampur dengan coolant. Penelitian menggunakan metode (NDT) Non Destructive Testing dan visual cracking. Penelitian ini dilakukan di Kampus Politeknik Negeri Balikpapan. Berdasarkan hasil pemeriksaan visual checking setelah proses NDT dapat disimpulkan bahwa kerusakan pada silinder liner adalah berupa cracking, cracking berbentuk patahan yang tidak memiliki deformasi plastic sehingga patahan ini bersifat brittle. Kegagalan pada silinder liner disebabkan oleh engine overheating, dan Saran yang dapat disampikan pada studi kasus ini adalah perlunya dilakukan pengujian sem untuk melihat struktur micro.

Keyword : Komatsu PC 750-7SE, Silinder Liner, Visual Checking, Cracking, Brittle

Nilai Properti
: RENDY ZULKARNAIN, : 150309261491, : Politeknik Negeri Balikpapan, : ALAT BERAT, : 2018, : Indonesia, : Tugas Akhir, : Prepustakaan Poltekba,

 

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Pembimbing
Wahyu Anhar, S.T., M.Eng.

E-mail :wahyu.anhar@poltekba.ac.id

www.poltekba.ac.id
Dr. Hadi Hermansyah, S.Si., M.Si.

E-mail :hadi.hermansyah@poltekba.ac.id

www.poltekba.ac.id
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