Jura Impressa C E F Type Grindstones Replacement Repair Guide

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Jura Impressa Type C E F opening procedure
2 steps
Jura Impressa C E F models grindstone replacement
2 steps
Jura Grindstone Replacement
7 steps

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Introduction

What you need

Step 1

              Jura Impressa Type C E F opening procedure

The instructions are suitable for nearly every model of Jura and similar ones e.g. AEG and Krups.
Unplug!
Remove the water reservoir.

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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Step 2

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 with the tool kits as well as 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 screw them out. If you haven´t got one you can carefully use pliers. It is a good idea to later change the screws for normal ones.
Beneath both top side covers are two Torx T15 screws. Remove those. Now lift off the whole top cover. Sometimes it jams and you have to use a bit of force.
The side covers must be pushed backwards by about 1 cm. Sometimes this is a little bit difficult to move. If necessary, wedge a plastic opening tool into the gap between the side covers and the front panel. The rear cover can be easily removed.

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 with the tool kits as well as 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 screw them out. If you haven´t got one you can carefully use pliers. It is a good idea to later change the screws for normal ones.

Beneath both top side covers are two Torx T15 screws. Remove those. Now lift off the whole top cover. Sometimes it jams and you have to use a bit of force.

The side covers must be pushed backwards by about 1 cm. Sometimes this is a little bit difficult to move. If necessary, wedge a plastic opening tool into the gap between the side covers and the front panel. The rear cover can be easily removed.

Step 3

              Jura Impressa C E F models grindstone replacement

The instructions apply to almost all devices from Jura and similar devices from AEG, Krups. The success of the repair is striking!
The picture shows the old grind stones on the left and the new ones on the right. They consist of a grinding ring and a grinding cone.
For this repair, the side parts do not necessarily have to be removed.

The instructions apply to almost all devices from Jura and similar devices from AEG, Krups. The success of the repair is striking!

The picture shows the old grind stones on the left and the new ones on the right. They consist of a grinding ring and a grinding cone.

For this repair, the side parts do not necessarily have to be removed.

Step 4

Pull the grinder adjuster up. Note the setting, it is best to take a photo of it.
The screws that hold the coffee container are located in two recesses. First clean, then loosen. The protective cover over the grinder does not need to be removed.

Pull the grinder adjuster up. Note the setting, it is best to take a photo of it.

The screws that hold the coffee container are located in two recesses. First clean, then loosen. The protective cover over the grinder does not need to be removed.

Step 5

              Removing The Grinder Ring

Now the grinder is free. Again take a picture, then pull out the axis of the adjuster with moderate force.
Depending on the model you will find a silicon sealing on top of the grinder ring, 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.

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

Depending on the model you will find a silicon sealing on top of the grinder ring, 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.

Step 6

              The Grinder Cone

In the next step be very careful not to loose these three springs, balls and cartridges.
The grinding cone is fastened with a long Torx T20 screw. The screw head is often covered with remnants of coffee beans. Expose the head and turn the screw out counterclockwise.
Now the bean feeder (the small white snail) can be removed. The grinder cone and drive can now also be lifted up carefully.

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

The grinding cone is fastened with a long Torx T20 screw. The screw head is often covered with remnants of coffee beans. Expose the head and turn the screw out counterclockwise.

Now the bean feeder (the small white snail) can be removed. The grinder cone and drive can now also be lifted up carefully.

Step 7

              Cleaning

In most of the cases the mill is full of sticky old coffee powder. Clean everything thoroughly for excellent coffee aroma.
The felt ring around the drive axis can be pulled out carefully using a needle. Clean it. For the inner grinder use a paint brush and a wet cloth, the other parts can be cleaned with a brush and warm water. Each part must be dried well before reassembling it.

In most of the cases the mill is full of sticky old coffee powder. Clean everything thoroughly for excellent coffee aroma.

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

Step 8

              Change The Grinder Ring

Push both of the small latches alternately. Then the ring cover should come out.
Two clamps hold the grinder ring in its place, push them aside and it should come free.
Again clean everything. Press the new ring and cover in its place. With that the grinder ring is exchanged.

Push both of the small latches alternately. Then the ring cover should come out.

Two clamps hold the grinder ring in its place, push them aside and it should come free.

Again clean everything. Press the new ring and cover in its place. With that the grinder ring is exchanged.

Step 9

              Change The Grinder Cone

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.
This screw turns into plastic. If it doesn’t fit properly, the thread will be damaged. So first turn the screw counterclockwise until you feel that the first thread is engaged. Then tighten it turning clockwise.

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.

This screw turns into plastic. If it doesn’t fit properly, the thread will be damaged. So first turn the screw counterclockwise until you feel that the first thread is engaged. Then tighten it turning clockwise.

Step 10

              Reassembling

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.
The adjustment oft the new grinder burrs musst not necessarily be the same as the old ones. You can approximately find the mean position, which was marked before, by turning the outer ring as far as possible clockwise, then turning it fourteen clicks backwards.
It is a good idea 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 it with a few coffee beans. Plug in the plug (be careful!), choose a cup of coffee and watch as the coffee grounds fall out of the grinder.

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.

The adjustment oft the new grinder burrs musst not necessarily be the same as the old ones. You can approximately find the mean position, which was marked before, by turning the outer ring as far as possible clockwise, then turning it fourteen clicks backwards.

It is a good idea 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 it with a few coffee beans. Plug in the plug (be careful!), choose a cup of coffee and watch as the coffee grounds fall out of the grinder.

Step 11

              Before - After

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!

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!

To reassemble your device, follow the above steps in reverse order.

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What you need#

Member-Contributed Guide

Introduction

What you need