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In this video, the master of the Doctor Coffee Machine service center will tell you how to replace the sealing rings on the piston of the brewing unit in a coffee machine, using the Delonghi Magnifica model as an example. Sealing rings: https://service-cm.ru/shop/zapchasti-... Food grade grease: https://service-cm.ru/shop/sredstva-d... Spatula for disassembling: https://service-cm.ru/shop/sredstva-d... Coffee machine forum https://forum.service-cm.ru 00:00 What is the video about? 00:23 How often should replacement be done? 00:51 What is needed for replacement? 01:24 Dismantling the piston of the brewing unit 02:48 Installing new seals 04:27 Assembling the brewing unit 05:59 What to lubricate and what not?