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Reparatur- und Zerlegeanleitungen für den Jura J5 Kaffeeautomaten

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Worn brew drive gear makes noise?

During rinse and also immediately after coffee flow stops there is an unusual noise that sounds a bit like a slipping gear or a loose part knocking. Any idea what could be causing this and might it be user fixable?

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Hello,

that sound is from the electric-magnet at the drainage-valve.

When the brewing stops, the fluidsystem would rinse through the nozzle

in the front and it would give many drops of coffee.

So this problem is solved by the drainage-valve, which lets the water out and air in

to stop the tripping.

The electric magnet knocks a steel-needle at a plastic cap which is mounted to

a metal axle in the valve which then opens.

Sometimes these Juras make awful humming noises while the electric-magnet

has current, too. - when these Juras get older.

As long as the knock sound and the humming is only hearable while the drainage-valve has

opened evverything is okay. :)

Friendly greets and good luck. :)

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But when it rattles it could be a damaged valve.

von

The noise is a very regular knocking that lasts several seconds, so perhaps the solenoid (electric magnet) cycling repeatedly due to some fault...

von

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Ah, yes, solenoid is the word for "electric magnet", thank you.

Look at that video, it shows a damaged brewgroup,

but you can see the action of the valve:

https://www.youtube.com/watch?v=Pxad75B2...

At 0,18 the solenoid gets current and opens the valve by pushing the metal axle. For that duration a humming noise is hearable, listen good.

At 0,23 the noise ends in the moment the valve snaps back.

If you hear fot those 5 seconds a knocking sound it is very shure that there is a problem with that solenoid, the valve or electronics.

I hope you understand me, sorry. :)

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The brew group needs to be repaired by replacing the seals and cleaning it. Kits and instructions are available.

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Bruce Covell wird auf ewig dankbar sein.
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