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Start the motor for the drain valve in Jura Z models

Introduction

If the drain valve is not opened properly, the most likely error pattern is as follows: after rinsing, the pressure is not taken from the brew group, the brew group motor continues to try to work, sounds very agonized. This process repeats itself a few times. The drainage motor from model Z6 can be removed quite easily. Often it can be restarted and it is not necessary to replace it.

Note: some pictures are from a different model and may differ slightly.

What you need

  1. Start the motor for the drain valve in Jura Z models, Opening the Jura Z series housing: step 1, image 1 of 1

    • Unplug the machine from the power outlet

    • Remove all attachments: water tank, drip tray, aroma lid

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  2. Start the motor for the drain valve in Jura Z models: step 2, image 1 of 3 Start the motor for the drain valve in Jura Z models: step 2, image 2 of 3 Start the motor for the drain valve in Jura Z models: step 2, image 3 of 3

    • Turn the machine so the back is facing toward the front.

    • The Jura sign must be removed. Turn it a few millimeters counterclickwise.

    • If this becomes difficult use a suction cup to assist.

    • Remove the Jura sign.

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  3. Start the motor for the drain valve in Jura Z models: step 3, image 1 of 2 Start the motor for the drain valve in Jura Z models: step 3, image 2 of 2

    • Behind the Jura sign are two screws with an oval head. They have to be removed.

    • These screws have an oval head that makes them look like rivets (picture 2). You need to use a special bit for their removal. If the right bit is not available, it could be done with a pair of needle nose pliers. Jura wants to keep us out of our own machines!!!!

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  4. Start the motor for the drain valve in Jura Z models: step 4, image 1 of 2 Start the motor for the drain valve in Jura Z models: step 4, image 2 of 2

    • Push the back down a bit and then remove it.

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  6. Start the motor for the drain valve in Jura Z models: step 5, image 1 of 1

    • Pull the right side panel- as seen looking to the frontpanel - backwards and take it off.

    • Sometimes it gets a bit stuck and may require a bit more of a pull.

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  7. Start the motor for the drain valve in Jura Z models: step 6, image 1 of 3 Start the motor for the drain valve in Jura Z models: step 6, image 2 of 3 Start the motor for the drain valve in Jura Z models: step 6, image 3 of 3

    • In this step, you should remove the screws of the left side panel. The side panel can only be removed after removing the top cover.

    • Remove the Torx T15 screw on the front wall of the side panel.

    • In the side part there is a lid over the brew group. The lid is fastened at the top with two oval head screws. Remove those to remove the lid.

    • With the cover removed the brew group becomes visible

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  8. Start the motor for the drain valve in Jura Z models: step 7, image 1 of 3 Start the motor for the drain valve in Jura Z models: step 7, image 2 of 3 Start the motor for the drain valve in Jura Z models: step 7, image 3 of 3

    • This step shows how to remove the top cover

    • Remove the powder tray and all coffee beans.

    • The cover is fastened with three Torx T15 screws. Those are easily visible under the covers as well as the small cover on the left back side.

    • Remove the two Phillips screws on the bean container and remove the bean container.

    • Lift the cover upwards.

    • If it is stuck, use a plastic opening tool to carefully pry it open.

    • The lid of the bean container is held in place by a small, strong magnet that loosely rests. It is either in the green marked recess, or it remains hanging on the bean container. Make sure it is not lost!

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  9. Start the motor for the drain valve in Jura Z models: step 8, image 1 of 2 Start the motor for the drain valve in Jura Z models: step 8, image 2 of 2

    • Pull the left side panel backwards to take it off.

    • For some repairs it is not necessary to remove the left side panel.

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  10. Start the motor for the drain valve in Jura Z models, Motor for the drain valve: step 9, image 1 of 2 Start the motor for the drain valve in Jura Z models, Motor for the drain valve: step 9, image 2 of 2

    • The drainage motor on the Z6 and following models is fixed with two Torx T15 screws. Unscrew them and pull out the motor.

    • Leave the cables connected to the motor for the time being. Trigger a flushing process and observe whether the pin moves back and forth. If not, the gearbox is blocked. You may be able to get it going with the following steps.

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  11. Start the motor for the drain valve in Jura Z models: step 10, image 1 of 3 Start the motor for the drain valve in Jura Z models: step 10, image 2 of 3 Start the motor for the drain valve in Jura Z models: step 10, image 3 of 3

    • The gearbox (the black plastic part) is attached to the metal engine block with four metal tabs. Straighten the tabs with a small screwdriver.

    • Pull the gearbox off the engine block.

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  12. Start the motor for the drain valve in Jura Z models: step 11, image 1 of 1

    • Turn the armature of the motor while holding the pin. Check whether the pin moves back and forth.

    • This probably solves the blockage. Grease the worm (and the pin) again a little. Position the worm so that it protrudes about 3 mm.

    • Reassemble the motor and bend the retaining tabs on the metal housing until it is tight.

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Conclusion

To reassemble your device, follow these instructions in reverse order.

One other person completed this guide.

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VauWeh

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3 Comments

The issue is likely a seized bearing. So when at step 11. Pull off the black cylinder and spray a penetrating lubricant (silicone spray) onto the bearing you can now see. The middle section should spin freely with no resistance.

D Wish - Reply

Having serviced a E8 brewgroup and still no coffee I bought a new brewgroup and still no coffee but at least I can sell my old serviced group - this little hack on motor has proved this was the culprit. - it working again but coffee is weak but at least I have a clue to fix properly and not spend the £300 Jura and or other “experts” wanted to look at it plus the parts

David Pinnington - Reply

Congratulations! If the coffee becomes weak, you should check the grinder. How many cups does the counter show? After more than 10000 cups, it may be worn out.

VauWeh -

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