Jura brew group overhaul tips

A few key tips, not a full overhaul tutorial. Here is a link to an excellent overhaul video: • Jura Brüheinheit zerle...

[@mguerramd]

Check this video about side plate removal and the "hidden" tab: kzbin.info/www/bejne/qmiqamhnaM15mNE

[@mguerramd]

Alright Bob and Suzanne I’m going to take a spare brew group, disassemble and reassemble and see if I can help you out. This should be easily remedied. Might video it.

[@megamac3898]

Thank you for the great clear tips

[@luki6777]

👍thank you for this simple but helpfull tips

[@FredG-2012]

Have rebuilt ENA3 brew group but just can’t get it operating smoothly when white threaded disc is turned up towards top when “drawer” should pop open forward below. Seems the portion w the gasketed cap is hung up somewhere. Have checked all alignments per yur video. Any idea? Thx

[@mguerramd]

See 1:02 to 1:04, that is one hour 2 minutes to one hour, 4 minutes in this video. (Not one minute 2 seconds to one minute 4 seconds) You have to get that piston ALL the way down when reassembling it.

[@mguerramd]

Put up a video on YT showing what's happening if you can.

[@bobfriedel2372]

I have been trying to fix my friend's ENA Micro 1 and I have a similar problem as some of the other commenters. I replaced the two large O-rings on the two pistons, but when it goes through a cycle, the lower piston always rises a bit too high and the lower piston cup never swings over to the side like it is supposed to. I have taken the brew group apart and rebuilt it multiple times today to no avail. I tried different starting positions during my live tests, but it always gets stuck going through a cycle. Is it time for a new brew group?

[@mguerramd]

kzbin.info/www/bejne/jaXCfJSoZr54mZosi=nE7d7z8QC7DbymZf

[@mguerramd]

Also be sure the bushings are in place on the gearbox pins. Absent the bushings the piston can go up just a bit too high and pop out.

[@bobfriedel2372]

@@mguerramd Thanks. I took apart and reassembled the brew group again, and I took apart the bottom piston cup entirely, and this time I really pushed that piston down as far as it could go. Further than my prior attempts. Then when I started up the coffee machine, it went through its startup procedure, cycling the brew group several times, and this time it was very smooth - everything went exactly where it was supposed to go! 😃 Unfortunately after cycling through the startup procedure, it stopped in the top position and hummed for a few seconds, and then all of the lights on the display flashed 5 times and the power turned off. I repeated this a few times with the same result. Any suggestions?

[@mguerramd]

@@bobfriedel2372 Oh boy I don’t know about that one.

[@bobfriedel2372]

@@mguerramd Thank you so much for sharing your expertise for us frustrated tinkerers! You are doing a great service.

[@user-bg7ok7ps7g]

Why does the lower, smaller piston keep falling out when I gear through the cycle

[@mguerramd]

Yes that is a problem. When you assemble the lower piston in to the gearbox, you have to push it ALL the way down so it is at the very bottom of its travel. The only way you know if you did it right is to assemble the brew group and try to cycle it. If it is popping out, you have to disassemble, (pop out the circlips, pull out the pivot pin) reposition the lower piston, reassemble, and try again! If you can't cycle it all the way around several times by hand, keep redoing it until you can. It can be a nuisance but you will get it.

[@user-bg7ok7ps7g]

@@mguerramd I have tried and tried and still piston gets is up just enough that it does not allow mechanism to move to correct position. It is fully down, all the way to the bar. I just ordered a new O ring hoping that will help

[@mguerramd]

@@user-bg7ok7ps7g It’s not the o ring. Once I had a lower piston start to come apart. It is a two piece structure. The geared peg is glued to the bottom of the piston. As they start to separate, the piston itself can loosen and start to move”up” on the peg. It will never cycle properly. It’s not necessarily evident until the two pieces fully come apart, then it’s obvious. Pull the lower piston out and grab the geared peg in one hand and the piston in the other. See if they are tightly connected in to one solid structure. There should be ZERO play between the two components, they may be so loose the two parts come apart! Standby for a link to a video.

[@mguerramd]

@@user-bg7ok7ps7g Here’s the video: kzbin.info/www/bejne/imSvXp2gh7eoedUsi=D621o-CClNPWrP0N

[@mguerramd]

@@user-bg7ok7ps7g And another video of the piston repair: kzbin.info/www/bejne/mJrFkpmOe9aUi9ksi=YCG9WJq0Dg5XzVEq

[@mguerramd]

Okay if your piston is popping out check this: kzbin.info/www/bejne/jaXCfJSoZr54mZosi=nE7d7z8QC7DbymZf