Introduction
From time to time, it is essential to check the brewing group to keep the aroma of the coffee good. Unpleasant coffee fat can settle under the two brewing sieves. The sealing ring may need to be replaced. You don't necessarily have to open the case (then skip the steps), but this is very simple and makes the job easier. Spare parts are not so easy to obtain, e.g. www.quickmill.at is a good address.
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Remove two Phillips screws at the top.
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Remove four Phillips screws from the back panel. They are very deep and you need a screwdriver with a very long shaft.
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Remove three Phillips screws from the bottom of the back panel
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Unscrew the two Phillips screws on both sides of the back.
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Then pull the back part backwards. Watch out for the power cord.
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Open the front door.
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The front part is still attached with two Phillips screws. turn them out.
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The front part now only hangs with cables on the connection buttons of the control panel. In order to get better access to the brew group or the grinder, it is sufficient to push the front part forward about 10 cm. If that's not enough, you have to free the control panel.
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Open the front cover
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Unscrew the coffee spout on the thumbscrew with your fingers.
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Clean thoroughly the coffee spout
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Pull off the two black protective caps above the mechanism at the top and bottom.
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The upper cap goes slightly upwards.
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The lower cap is hooked with four lateral rests. Push the cap a little together to loosen it.
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The upper piston is attached to the drive with a splint.
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Pull out the sap with pliers.
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The piston is free, but still hangs on the pressure hose of the water inlet.
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A brass ring is placed on top of the piston, do not lose it.
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This piston seal is damaged and needs to be replaced.
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The upper piston is generally not as dirty as the lower one, as the fresh water flows in here.
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Unscrew the Phillips screw on the brewing sieve and remove the brewing sieve.
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Clean the plunger very thoroughly.
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Clean the brewing sieve very thoroughly. Leave it in machine detergent for some time. Check if all holes are free, if necessary you can open them gently with a needle tip.
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The lower piston is secured with a cotter pin. Pull it out with pliers.
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When the piston rod is free, you can push the piston up and remove it.
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The lower plunger has coffee flowing through it and is therefore more contaminated. Loosen the Phillips screw, then it will break into three parts: strainer, shaft and piston with chamber.
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Put everything in machine detergent for some time and then clean it very thoroughly. The piston chamber must not contain any more coffee grease, the holes in the sieve must be free.
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You can keep the piston rod very thinly lubricated with a food-safe lubricant, but this is not absolutely necessary.
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Complete the steps in reverse order to reassemble the device.
