XYZ is a palm oil mill . Produce crude palm oil (CPO) PT. XYZ have not implemented the system machine maintenance effectively, maintenance system that has been implemented is corrective maintenance that is make improvements when there is a break down. Besides that it is also assisted with planned maintenance scheduled every week for cleaning production machines. The refore it is necessary to identify the engine components who are prone to breakage (critical component) and necessary to do action maintenance specifically against critical components engine by applying maintenance schedule prediktif ( prevention) simulation technique, often know as estimate reliability using a random sampling scenario failure mode and effects (FMEA) defined as a process used to deter mine action to be done to guarantee each item physical or system can go well according to the function performed by its usersthen basedon data processing, replacement, inspection of turn filter componentsone time per year with atime sixty minutes, thegear box is worn outonetime per year with a time of one hundred andtwenty minutes, leaking in the engine body as much asone a year during eighty minutes, thewire caught fire one time per year with time fifty minutes, cable having problems as much one time per year with time one hundred eighty minutes.

PT. XYZ is a palm oil factory (PKS) producing crude palm oil (CPO). PT. XYZ has not implemented an effective engine maintenance system. The maintenance system that has been implemented is corrective maintenance, which is making repairs when there is damage. In addition, it is also assisted with planned maintenance that is scheduled every week to clean production machines. Therefore it is necessary to identify machine components that are susceptible to damage (critical components) and it is necessary to take special care measures for critical machine components by implementing a predective maintenance schedule (Prevention). Simulation techniques, often known as Monte Carlo simulation, estimate reliability using sampling random scenario. Failure mode effect analisys (FMEA) is defined as a process used to determine the actions that should be taken to ensure that each physical item or a system can run properly according to the function desired by the user then based on data processing, replacement of the roller binding drum binding drum , angle iron welding, chain transmission component replacement, drum stopper bearing replacement. Replacement of the drum stopper bolt, replacement of the chain transmission part is very loose and the replacement of the iron is carried out in corrective maintenance (replacement of components after damage occurs). And the results at the lowest value on the thresher engine component are in the Loose Transmission Chain component, the repair rate is 0.5 hours and the number is 0.999737189. Based on the results of the analysis of numbers (availability), the highest number is found in Broken Elbow Iron with a repair rate of 3 hours and the number 0.999605833

To produce according to production targets, of course supported by machines and equipment at every stage of the process and must be operated effectively and efficiently. operating machinery and equipment effectively and efficiently requires a good machine maintenance system. The research method used is Overall Equipment Effectiveness. After conducting the research, the average value of the Overall Equipment Effectiveness of the wafer is 34.00%. This result is still far from the world class standard of 85%. It is known that the biggest losses that cause the low OEE value are reduced speed losses by 143.3% and defect losses by 9.68% of the total losses. What causes low losses consists of factors such as machines, humans, environment, and methods. . To reduce these losses, the company should provide skills training and knowledge to operators about signs of damage to the equipment. In addition, operators are given additional work in the form of equipment maintenance that is often used at work so that maintenance work can be more focused. Then the company must pay more attention to operator comfort in working so that fatigue can be reduced and operator productivity increases and increases operator awareness of the equipment they use.

Pengecoran adalah salah satu teknik pembuatan produk dimana logam dicairkan dalam tungku peleburan kemudian dituangkan kedalam rongga cetakan yang serupa dengan bentuk asli dari produk cor yang akan dibuat. Pada saat ini banyak dilakukan penelitian pengecoran logam khususnya aluminium dengan berbagai macam bahan bakar seperti minyak solar, minyak tanah, gas LPG, batu bara dan sebagainya, baik dikalangan universitas maupun di suatu badan penelitian. Untuk dapat melakukan pengecoran logam maka harus dilengkapi dengan alat peleburan yang mendukung. Hal inilah yang mendorong penulis untuk melakukan perencanaan dapur lebur aluminium dengan kapasitas 20 kg untuk skala laboratorium dengan bahan bakar gas LPG, mengingat masih minimnya fasilitas yang tersedia di Laboratorium Proses Produksi Teknik Sekolah Tinggi Teknik Harapan. Dalam melakukan perancang dapur lebur ini, penulis melakukan studi literatur dan survey lapangan untuk mempelajari dan melihat model-model rancang bangun dapur alumunium. Dari hasil perencanaan diperoleh dapur pelebur dengan tipe dapur Crucible, dengan diameter dapur 560 mm, tinggi dapur 520 mm, diameter luar cawan 220 mm, tebal cawan 20 mm, tinggi cawan 355 mm.

State Vocational School 1 Sei Rampah Serdang Bedagai Regency annually holds Competency Exams for Class XII Lightweight Vocational School, prior to conducting the National Examination. Every year almost 90% fail in the Competency Exams conducted by these students. Therefore we are from Faculty of Engineering and Computer teaching staff serve this Vocational School to hold Competency Test Training for Class XI Students, so as not to fail when they later in class XII, to carry out competency tests. As for the implementation of competency training are: Tune up competency test training, Electricity, Steering System, Over Hole Engine and chassis.