Question about Bialetti Mokona Espresso Machine

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Coffee scraper arm sticking

Ive just replaced some parts on my Krups xp7230 espresseria but not Its jamming at the end of the brew cycle. When the lower piston rises to eject the coffee grounds, the arm that sweeps across to eject the grinds is sticking on the piston.it seems that either the lower piston is rising too high or its not dropping as quick as it should. Has anyone else experienced this?

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  • Bialetti Master
  • 1,364 Answers

You will need to remove the brewing unit from the base and tip it upside down to inspect/free up the mechanism. While you have it that far replace the seal (barista seal) at the bottom of the brewing chamber that seals the rod on the ejector mechanism. Also inspect the back of that sweeping arm where it runs in a track at the back of the tamping piston ram. A new tamping piston with seals and tank seal would not go astray, all the parts are relatively cheap NZ$40 easily gets the lot.

Posted on May 19, 2014

  • Andrew Kirwan
    Andrew Kirwan Jun 08, 2014

    Ive just replaced the barista seal and the entire upper and lower pistons. it was runnng perfectly after that but now the ejector scraper arm gets trapped on the ejector piston. it seems as though the arm isnt sweeping across at exactly the right time.

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4 Suggested Answers

Anonymous

SOURCE:

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Posted on Jan 02, 2017

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Anonymous

  • 1 Answer

SOURCE: THE HEATER UNIT-UPPER PART JOINT LEAKS

put some drops of machine oil at the point the two parts join and srew it and unscrew it four times. then you make coffee again!

Posted on Mar 05, 2009

ginko

Ginko

  • 19396 Answers

SOURCE: I have just bought a

Yep, load of suggestions. Moka are quite difficult to use if you are not used to them:

Try cleaning the filter. It may be clogged after brewing in the wrong way.To clean, remove rubber gasket, remove filter disk from upper part of the Moka, and clean it.
The gasket must be replaced if there had been overheating. In that case the gasket looks stiff, melted, and the moka may drip water from water container sides while brewing.
If gasket looks Ok, leave it.

Ensure that water level is BELOW the valve, if water is covering the valve, there will be no space for air chamber before reaching coffee, and you get only steam. If there is water getting inside the coffee basket before pouring coffee, then water level is too high.

Put coffee until you reach more or less the edge of container basket. DO NOT PRESS coffee, or you will get a strong bad-testing coffeee or only steam.

About the flame, use a small hob, with flame staying below the base of the water container. A technique is keeping flame lower while reaching boiling point, then putting it up when the moka starts brewing. I suggest just keeping a well heating flame on a small knob and ensuring that the flame is staying below the base of the moka.

Ensure that the coffee mix is not too fine-grinded, even if Italians use often electric coffee machines in moka, it may result more difficult to get a brew out of thin-grinded coffee.
Percolated machine coarser mixtures will give a milder brew, but they are easier to use. Mokas brew like Lavazza are the best.

If that still does not do the job, try doing a couple of brews with water only, then do a coffee brew following hints above.

Extra hint: to get the best brew use purest possible water. Use Arabica blend for a fuller taste.

Let me know if the moka is finally working, in that case please do not forget to accept the solution.

All the best.

Ginko.

Posted on Aug 23, 2010

Anonymous

  • 7 Answers

SOURCE: barely any coffee rises to upper chamber after cooking

It's the gasket!!!!! Store the pot with the two parts screwed TIGHTLY together for about a week. Tighten it up as the new gasket compresses. Problem solved in two weeks or less. Also cook on medium to low heat. High flame seems to make the problem worse.

Posted on Sep 12, 2009

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