Ena Micro 9 grindstone replacement

はじめに

If the coffee becomes weak, the grindstones may be worn. The grindstones are not sharp enough to grind the coffee cleanly. Replace them to restore the full aroma.

There are different grindstones. Make sure you follow the instructions in the last step so that you use the correct replacement part.

必要な工具と部品

手順1 Jura ENA micro 9 opening procedure

Ena Micro 9 grindstone replacement, Jura ENA micro 9 opening procedure: 手順 1、 1の画像 1

Pull out the power plug!
Remove all attachments, such as the water reservoir, coffee grounds drawer, and bean compartment lid.
Remove all coffee beans.

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手順2 Top covers

Ena Micro 9 grindstone replacement, Top covers: 手順 2、 2の画像 1

Ena Micro 9 grindstone replacement, Top covers: 手順 2、 2の画像 2

The top covers do not necessarily have to be removed for all repairs. However, it is indispensable for thorough cleaning. It may be easier to loosen the top covers if the side panels are removed first. The process is somewhat tricky.
Pry the central ventilation cover up.

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手順3

Ena Micro 9 grindstone replacement: 手順 3、 3の画像 3

Use the spudger to press in on both sides of the marked area. Then the front cover around the on / off switch is unlocked. You can then lift it up at the front and pull it out at an angle.
If the side openings for the spudger cannot be found, the model is slightly different. With this version you have to insert the spudger into the gap between the front panel and cover, about 3 cm from the edge and then push it firmly towards the center to unlock. At the same time, lift the cover a little at the front.

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手順4

Flip up the front cover.
Remove the cover. In the model with the side holes, you can pull them out at an angle to the front. With the other model, you have to push it back a little to unhook it, then lift it up.

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手順5

This is what it looks like when the two lids are gone. A lot of dirt built up.

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手順6 Side panels

Ena Micro 9 grindstone replacement, Side panels: 手順 6、 1の画像 1

The side parts are pushed out to the rear. However, they are secured with two screws and a lock at the top and a wedge-shaped catch on the sides.
Unscrew the two T15 Torx screws that secure the side panels at the top.

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手順7

Ena Micro 9 grindstone replacement: 手順 7、 3の画像 3

The lock is located under the Jura badge on the back. Turn it counterclockwise about 20 degrees, then you can remove it.
Unfortunately, this one is very stuck. Nothing helped with this device, no suction cup or stiff adhesive tape. Here it is opened with a somewhat more rustic method:
Two small holes were drilled a few millimeters deep, then two small screws were screwed in. The badge could finally be turned and removed with a pair of pliers.

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手順8

Ena Micro 9 grindstone replacement: 手順 8、 3の画像 3

This is what it looks like underneath. The lock is secured with an oval head screw. It looks like a rivet. To open you need a special oval head bit, in an emergency you can use pliers.
Remove the oval head screw.
Push the lock firmly upwards as far as possible.

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手順9

The side parts are held at the top and bottom with three hooks each. Therefore, they have to be moved backwards to detach them. However, they are secured against shifting with wedge-shaped notches at the front. The next step shows how they can be solved.
The notches must be lifted out of the openings. They are located on both sides at the top and bottom about 1.5 cm from the edge and 7 cm from the front edge.
This is what the wedge-shaped notches look like

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手順10

Ena Micro 9 grindstone replacement: 手順 10、 3の画像 3

Lay the machine on its side.
Pry the side panel about 7 cm from the front edge, about 3 mm high. This will cause the catch to come out of its opening. Use a strong tool, preferably one made of plastic.
Position of the wedge-shaped notch: 7 cm from the front edge, 1.5 cm from the top or bottom edge.
Leave the tool in place. Insert an opening pick 7 cm from the front edge so that the wedge-shaped notch can no longer engage in its opening. Pull out the tool.
In the same way, insert another opening pick on the opposite edge.
Now both notches are free and the side part can be moved in the next step.

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手順11

Push the side panel firmly backwards. It may get stuck a bit and you need to use a plastic pry tool to help.
Take off the side panel and set it aside.
Repeat for the other side panel.

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手順12

Ena Micro 9 grindstone replacement: 手順 12、 3の画像 3

Release the catches on the top of the inner cover.
Flip the inner cover down and lift it out. The brew group becomes now visible.
The third picture shows a view of the other side.

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手順13 Top cover

Ena Micro 9 grindstone replacement, Top cover: 手順 13、 1の画像 1

Remove the three Torx T15 screws that secure the top cover.
Carefully remove the top cover. Start at the back. The top cover is stuck quite tightly under the front cover, carefully remove it bit by bit.

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手順14 Grindstones

Ena Micro 9 grindstone replacement, Grindstones: 手順 14、 3の画像 1

Ena Micro 9 grindstone replacement, Grindstones: 手順 14、 3の画像 2

Ena Micro 9 grindstone replacement, Grindstones: 手順 14、 3の画像 3

The grinder is now open.
Pull off the red plastic clip on the grind adjuster.
Lift out the grinder adjuster.
When reassembling, make sure that the deflection lever for actuating the white microswitch is inserted correctly. (Already removed in the picture). The axle is marked in red.

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手順15

Basically, the grindstones are replaced in the same way as with other Jura grinders, use these instructions.
Be sure to follow the instructions in the next step before you buy the grindstones!

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手順16

Different grinders are used in the ENA models. The grindstones must be replaced with the same type. It is better to remove the grindstones beforehand and compare them before buying new ones.
The first picture shows the grindstones for the Aroma Plus grinder. An indication of this is that the grinding process only takes about 3 seconds. A groove is clearly visible on the upper edge of the grinding ring. The grinder has a slightly different design, the slip clutch with springs and balls under the grinding cone is missing.
The second picture shows the conventional model. The grinding ring has no groove. The grinding process takes about 6 seconds.