Jura J models motor drain valve into operation

Written By: VauWeh
  • Comments: 5
Jura J models motor drain valve into operation

Difficulty

Moderate

Steps

13

Time Required

No estimate

Introduction

If the drain valve is not opened properly, the most likely error pattern is as follows: after rinsing, the pressure is not released from the brew group, the brew group motor attempts to work and will sound very strained. This process repeats itself a few times. The drainage motor can be removed quite easily. Often it can be restarted and there is no need to replace it.

Note: the J5 does not have a drain motor, but an electromagnet. Use this guide to replace it.

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    • Unplug the power cord!

    • Remove the water tank and the drip tray. Remove all coffee beans from the storage container.

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    • Flip open the lid of the bean compartment.

    • Unscrew the two slotted screws inside the bean compartment. The screws have a rubber washer and will not come out completely.

    • Remove the bean compartment.

    Bei mir war nur die auf dem Foto gezeigte Schraube vorhanden, habe dann die 2. gesucht....gab es aber nicht. Es scheint also mehrere Ausbaustufen der Maschine zu geben ;-)

    Michael -

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    • The top cover is fastened with oval head screws. Unscrew them.

    • These screws have an oval head that makes them look like rivets (picture 2). You need to use a special bit - also available at iFixit - for their removal. Here a DIY guide. 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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    • Also remove the two oval head screws underneath the ground coffee compartment lid.

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    • Now you can pry up the top cover all around.

    • Remove the top cover. This often requires a little force.

    • Use plastic tools to avoid scratching your device.

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    • Turn the device with the back facing you.

    • Turn the Jura label a few degrees counterclockwise. If it's hard to do, use a small suction cup.

    • Remove the Jura label.

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    • Underneath the label you will find two Torx T15 screws. Remove them.

    • Carefully pull the top of the chrome cover slightly outwards, then push it down and put it aside.

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    • Remove the Torx T15 screw on the side panel with the water tank.

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    • Pull the right side panel slightly towards the back.

    • Remove the side panel.

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    • Pull the left side panel slightly towards the back and remove it.

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    • The drainage motor on the J6 and following is fastened with two Torx T15 screws. Unscrew those and pull out the motor.

    • For now leave the cables connected to the motor. Trigger a flush and observe if the pin moves back and forth. If not, the gearbox is blocked. You may get it going again by the following steps

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    • The gearbox (the black plastic part) attaches 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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    • Turn the armature of the motor while holding the pin. Check whether the pin moves back and forth.

    • This may already have released the blockage. Grease the worm (and the pin) again a little. Position it so that it protrudes about 3 mm.

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

Conclusion

Work through the steps in reverse order to reassemble your device.

Author

VauWeh

Member since: 19/10/15

234462 Reputation

4 comments

Super, vielen Dank. Ich habe mit dem Tipp meine Jura A1 wieder hinbekommen. Nach dem Tausch der Brühgruppe konnte die Jura keinen Kaffee mehr brühen. Das Pulver landete trocken im Tresterbehälter. Das gesamte Wasser in der Schale.

Der Stift des Drainageventilmotors schaute auffällig weit heraus. Daher musste der Motor überprüft werden, da offenbar das Drainageventil auf Daueroffen eingestellt war.

Allerdings war der Motor nicht defekt. Nach dem Ausseinandernehmen des Motors wie oben beschrieben, funktionierte es wieder. Wichtig ist das der Stift wieder gängig gemacht wird und die Schnecke (nicht der Stift) exakt 3mm hervorsteht. Bei mir war sie komplett im Getriebe verschwunden. Hoffe, ich kann anderen mit diesem Problem weiter helfen.

coffeeNERD -

Was für ein guter Tipp! Vielen Dank!!

Maria Parker -

Good morning, I have a Jura Z6 and the problem I am having is that the drain valve is permanently open to the drain, because the pin is fully extended even with the machine off. I am not sure how this motor works but seems to be not right, Could you please give me your opinion about how to fix it?

Thank you,

Robinson

Robinson Mejia -

Try to fix it using this guide, it's rather easy and should work after repair. If not replace it with a new one.

VauWeh -