Jura Impressa S models dispensing head revision

はじめに

Like on almost all coffee machines the dispensing head van be clogged up by coffee grease, the Jura S models are no exception. Once blocked, no coffee will be dispensed by the nozzles. The coffee will run through the sides, or only one nozzle is open. You can try to clean the nozzles with a pipe cleaner, but this is not a good and long-term solution.

A revision and cleaning is not that difficult. For this purpose the machine has to be opened up.

必要な工具と部品

手順1 How to open a Jura Impressa S model cover

Jura Impressa S models dispensing head revision, How to open a Jura Impressa S model cover: 手順 1、 2の画像 1

Jura Impressa S models dispensing head revision, How to open a Jura Impressa S model cover: 手順 1、 2の画像 2

Always remove the power cord from the wall outlet.
Lift out the coffee tray
Remove the lid sealing the coffee bean container
Remove all of the coffee beans you can possibly remove.
Pull the adjuster of the coffee bean grinder straight up
Remove the four T15 Torx screws

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手順2

Remove the cup heat plate.
It can be opened like a book.
Below the cup heat plate there are three more T15 Torx screws. Remove them.

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手順3

The top cover is now free. Lift ´er up and set ´er aside.

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手順4 Jura Impressa S model front cover

Jura Impressa S models dispensing head revision, Jura Impressa S model front cover: 手順 4、 2の画像 1

Jura Impressa S models dispensing head revision, Jura Impressa S model front cover: 手順 4、 2の画像 2

Remove the knob for the steam valve by simply pulling it off.
The front cover is secured with a Torx T15 screw. Remove it.

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手順5

Now the front cover can be opened like a door for a few inches. The hinge is on the left.

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手順6

Various hoses hinder the further opening of the front cover. You need to remove the steam valve keypad from the cover.
Use a spudger to lift the two notches at the top of the front cover a bit to release the keypad at the top.
Lift the keypad upwards and pull it to the back. The steam pipe will slide out from its connection.
All hoses can remain connected.

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手順7

Remove the silicone hose leading from the steam valve to the coffee spout. If it is secured with a cable tie which must be removed first.
The front cover is now free and can be opened.

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手順8 Revision of the dispensing head

Jura Impressa S models dispensing head revision, Revision of the dispensing head: 手順 8、 3の画像 1

Jura Impressa S models dispensing head revision, Revision of the dispensing head: 手順 8、 3の画像 2

Jura Impressa S models dispensing head revision, Revision of the dispensing head: 手順 8、 3の画像 3

Turn the machine so that the back is facing you and push the coffee spout up as far as it will go.
Directly above the upper edge of the housing are two openings on the back of the coffee spout. In them you will see two detents. Carefully press the latches inwards, then you can remove the cover of the coffee spout.

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手順9

The opened coffee dispenser looks like this.

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手順10

Jura Impressa S models dispensing head revision: 手順 10、 3の画像 3

Open the front panel like a door.
The supply lines are connected with an angle piece. Above on the angle piece is a clip. Carefully bend it little upwards and pull out the angle piece. It might be stuck a little at first.

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手順11

The coffee spout is still clipped in with four detents. Carefully press the four latches inward - this is quite difficult - and lift the coffee spout out to the front.

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手順12

This is how the coffee spout looks from the back.

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手順13

The chrome coffee spout distributor must be slid out for cleaning. It will probably jam the first time.
The distributor is secured with a detent. Carefully lift the detent with a metal spatula.
Place a lever tool in the gap between the distributor and the coffee spout. Gently lift the distributor out about 8 mm alternately on the left and right.

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手順14

Jura Impressa S models dispensing head revision: 手順 14、 3の画像 3

Turn the coffee spout upside down. The inner coffee spout must be removed for cleaning.
This model still has a metal tube inserted for the tea water. First loosen the plastic lock, then carefully pull out the tube with wiggling movements.
The inner coffee inlet is still clipped in. Release the catch and lift it out.
Watch out for the magnets that act as a brake on the sliding plate. Do not lose them.

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手順15

The coffee outlet manifold of this unit was un-appetizingly dirty. The aroma of the coffee suffers. The coffee no longer went through properly.
You can pull the distributor off completely, but it is not absolutely necessary. Clean all parts well or replace if something is damaged.

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