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The upper part of the coffee-tube is also clipsed in. Turn it and push the clips. It will snap off. There is no sealing-ring. The sealing-ring for this connection is inside the upper coffee-piston on top of the tube from the Crema-Valve. I show it later.
The cover over the white gearwheel has 4 clipse, one at each corner. Use a small screwdriver to leverage it up.