Introduction

If your machine only pruduces thin and weak coffee the grinder maybe dull. The instructions are suitable for nearly every model of Jura and similar ones e.g. AEG and Krups

The instructions are suitable for nearly every model of Jura and similar ones e.g. AEG and Krups.
  • The instructions are suitable for nearly every model of Jura and similar ones e.g. AEG and Krups.

  • Unplug!

  • Remove the water reservoir.

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On the rear side is an obstacle: four "oval head screws" looking like rivets. You can remove them using a special oval drive bit. They are sold at iFixit, at some Jura suppliers or somewhere in the internet. Jura wants to keep us out of our own machines!
  • On the rear side is an obstacle: four "oval head screws" looking like rivets. You can remove them using a special oval drive bit. They are sold at iFixit, at some Jura suppliers or somewhere in the internet. Jura wants to keep us out of our own machines!

  • Using an oval head bit you can turn them out. If you haven´t got one you can carefully use tongs. Its a good idea to change the screws for normal ones.

  • Beneath both top side covers are two Torx T15 screws. Turn them out. Now you can lift off the whole top cover. Sometimes it jams and you have to use force.

  • The side covers must be pushed about 1 cm backwards, sometimes it´s a little bit difficult to move. If necessary wedge a iFixit opening tool into the gap between the side covers and the frontpanel. The rear cover can be removed easyly.

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  • This guide is suitable for many models oft Jura Impressa and similar ones oft AEG and Krups. The results of this repair are amazing!

  • On the picture you can see a new pair of grindstones on the left side and an old pair on the right. The stones consist in a ring and a cone.

  • You must not necessarily remove the side covers.

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  • Make a photo of the adjuster in order to restore the situation later, then pull it out.

  • There are two holes in which two screws hold the container for the coffee. Clean them, then unscrew them. The protection cap must not be removed.

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  • Now the grinder is free. Again take a picture, then pull out the axis of the adjuster.

  • There is a silicon sealing, remove it.

  • Watch the fabrication signs , here green. This alignment must be restored later. Now turn the great black gear about 90 degrees counterclockwise. The grinder ring is free and can be lifted off.

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  • In the next step be very careful not to loose these three springs, balls and cartridges.

  • Now the coffee bean feeding helix can be removed. Very very carefully lift off the grinder cone

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  • Clean everything well.

  • The felt ring around the drive axis can be pulled out using a needle. Clean it. For the inner grinder use a wet cloth, the other parts with brush and warm water. Each part must be well dried before assembling it.

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  • Push both latches alternately. The ring cover comes out.

  • Two clamps hold the grinder ring, push them and it is free

  • Again clean everything. Press in the new ring and cover.

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  • First insert the cleaned driver, then the three sleeves, springs and balls. Now fit the grinding cone on the three balls.

  • Then fit the auger, screw in central screws. When screwing in, push the cone downwards and make sure that everything meshes.

I think the balls have to go first. That way the middle stone can slip if the grinder is blocked.

That is also what the exploded diagram that circulates online seems to show.

Comments appreciated.

Mark - Reply

I did this fix many times: the balls are on top oft the springs! They do fit into the corresponding holes in the underside of the cone, as you can clearly see in the picture. If the cone is stopped by e.g. a little stone, the balls come out of the holes saving the motors life.

VauWeh - Reply

Thank you for the explanation! It is clear now.

Mark - Reply

  • Insert grinding ring. The black gear is turned to the right again until the three marks are aligned. Then reinstall the adjuster drive shaft as it was originally.

  • It is good to check if the grinder rotates freely. You can remove the meal hopper and look at the millstones from the side.

  • Then install the remaining parts in reverse order.

  • You can set the grinding degree nicely by placing an empty roll of toilet paper perpendicular to the open mill and filling a few coffee beans there. Plug in the plug (be careful!), Choose a cup of coffee and watch as the coffee comes out of the mill.

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  • These two pictures are no fake: Before repairing the grinder the coffee is thin and transparent. With new stones the coffee is strong and has a fine crema. The repair was a real success!

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Conclusion

Now follow the remaining steps in reverse direction.

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VauWeh

Member since: 10/19/2015

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