Perencanaan Sistem Pemeliharaan Mesin Roller Head Dengan Menggunakan Metode Reliability Centered Maintenance II (RCM II) (Studi Kasus di departmen maintenance PT. Bando Indonesia)

Abstract

PT. Bando Indonesia adalah perusahaan penghasil conveyor belt, terdiri dari departemen v-belt dan conveyor belt. Berdasarkan data kerusakan pada periode Agustus 2015 sampai dengan Juli 2016, departemen conveyor belt memiliki persentase breakdown yang lebih besar dibandingkan dengan departemen v-belt. Kemudian di departemen conveyor belt, mesin Roller Head memiliki frekuensi breakdown terbesar. Reliability Centered Maintenance II adalah salah satu metode yang dapat digunakan untuk melakukan evaluasi tindakan perawatan dari setiap komponen mesin. Penerapan metode Reliability Centered Maintenance II diharapkan mampu memberikan interval perawatan yang lebih baik agar keandalan mesin menjadi lebih baik. Dari hasil nilai Critical Priority Number (CPN) terlihat bahwa terdapat 5 komponen yang paling kritis pada mesin roller head yang memiliki nilai CPN tertinggi yaitu gear sebesar 32, rantai conveyor transfer sebesar 25, bearing sebesar 24, screw sebesar 24 dan main motor sebesar 24. Berdasarkan Logic Tree Analysis (LTA), komponen gear, rantai conveyor transfer, bearing, screw dan main motor perlu dilakukan kegiatan scheduled discard task dan pada analisis karakteristik kegagalan, kelima komponen tersebut termasuk dalam fase laju kerusakan yang cenderung meningkat sehingga perlu dikakukan penggantian komponen. Terkait interval waktu perawatan diambil dari biaya perawatan (Tc) yang paling minimum dan dapat menurunkan biaya perawatan pertahun sebesar Rp 33.304.864 atau sebesar 14,51%.

ABSTRACT

PT. Bando Indonesia is the company which produce conveyor belt. The company have two departments, v-belt department and conveyor belt department. Based on breakdown data from August 2015 to July 2016, conveyor belt department has higher breakdown percentage than v-belt department. Then, in conveyor belt department, Roller Head machine has highest breakdown frequency. Reliability Centered Maintenance II is one of methods which could use for maintenance act evaluation from each machine components. Implementation from Reliability Centered Maintenance II expected give better maintenance interval so the machine reliability could be better. Based on Critical Priority Number (CPN) score could see if there 5 critical components in roller head machine. The critical components with its CPN score are gear (32), conveyor transfer chain (25), bearing (24), screw (24), and main motor (24). Based on Logic Tree Analysis (LTA) for the 5 critical components, they need to give scheduled discard task activity. Then based on its fault characteristic analysis, the breakdown rate phase tends to increase significantly and need to replace. Based on calculation of maintenance interval time to minimize downtime and minimize maintenance cost (Tc) from each critical component results if maintenance cost each year could decrease Rp. 33.304.864 or 14,51% lower than existing condition.