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IrWCSoh

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About IrWCSoh

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  1. Maintenance team are usually not involved in production assembling of equipment. Minimising reassembling issues actually begins from the earlier stage of disassembling of used equipment. In new equipment, all components are new and it is much easier to strip down a new unused equipment ( if you want to do reverse engineering and record the manufactured original measurement) and reassembling back. Used equipment disassembling is a different ballgame. If a technician has no specific experience in disassembling of a particular equipment, but familiar with general good practices of disassembling ( including inspection, recording as-found settings and marking adjacent components), he could still be able to overhaul the equipment. However, it would be advisable to obtain a cross section drawing and study what components make up the equipment and the features and material of each components. Features for aligning and mating should be identified. It would be good to take that copy of the cross sectional drawing and colour each components in different colours. Below is an example. This is my first condition for any technician to be allowed to lead in the overhauling work, that is able to colour such drawing correctly. From the drawing the technician can determine the correct and proper sequence of dismantling, what jigs and tools are needed, and the cares to be taken. After completion of the disassembling, each and every used component must be inspected visually and dimensionally, for imperfections i.e wears, distortion, etc. Even new component must be inspected and measured to determine the likely fits and clearances and possible mismatch during reassembling. Worn parts may needed to be rebuilt. Any damages, from the disassembly must also be corrected. Each component must be handled with care as dents can create problems during assembling. [ There is no 100% guarantee that new parts even from reliable trusted source can fit perfectly to adjacent components that are reused). If you are reusing components, an experience technician can foresee the issues that he is likely to face during reassembling. Whatever findings during disassembly, the inspection of old or new parts,the refurbishment works on components can already assist in foretelling the likely issues during reassembling. Cleanliness during an reassembling is extremely important. Fitting should always be carried out with care in accordance with Good Engineering and Industrial Practices, especially when power tools are employed. There are so many do and don't in reassembling of equipment to obtain a flatten reliability bathtub curve for that equipment. Simply assuming that overhaul is just parts-changing often lead to random failure.
  2. Hi, I am (Ir) WCSoh from Malaysia, and I considered myself semi-retired. Instead of retiring, I decide to share my life long technical knowledge and business knowledge in the field of Industrial Maintenance, Repair & Overhauls, Customised Machine and Jigs design and years of experiences in operating and owning Engineering Job Shops. Startups and young entrepreneurs and engineers who are keen in this field of maintenance, reliability and asset management are welcome to contact me. For the next few years, my current workshops and facilities including archived technical and record library will be available. Over the years, I realised that random failure is merely a lack of knowledge or information, oversight or abuse. Machinery failures continue to happen and will continue to crop up as long as human are involved in the life cycle of plants and equipment. Further, actual scope and details of overhauling and repairs always vary from job to job even if they looks similar. Wears, deteriorations, imperfections are never consistently similar. Many IMRO vendors do not keep detail records of work done and are not aware of problems or repairs history of the equipment. Different vendors may be involved at each tendered overhauling or repair job of the same equipment. Thank you, and looking forward to participate towards the mutual growth of all menbers in the community.
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    IrWCSoh

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