Jura Z7 Impressa - Z7 overhaul issues..

    • Jura Z7 Impressa - Z7 overhaul issues..

      Hersteller: Jura | Typ-/Modell: Z7 Impressa | ca. Baujahr: Unbekannt

      Hi, I'm new to this forum but have been using the search function for the last couple of weeks . I've learnt a lot from you guys, but I'm still having some issues from my Z7.

      I have recently acquired a Jura Z7 for cheap that hadn't had much care and love. It has done around 8500 rounds in total but I think it is one of the early models.

      First time I switched it on it gave Error 8, but after a bit of searching I dismantled the brew group and cleaned it. Got it working somehow but the seals needed replacing and it needed a hose changed from the steam thermo block as it was leaking on top of the ceramic valve housing.

      Once the parts arrived, I overhauled the brew group and the drain valve and replaced the broken hose.

      I have run the descaling process twice and the machine clean successfully several times. Water now comes out super clear. I still have a noisy brew group motor but before I tackle that I wish to solve the issue below.

      I have an issue with the rinsing cycle. If I am not mistaken, when I first got it, while performing the machine rinse, it used to output water from the coffee spouts and when I ran the cappuccino rinse, it used to first output water from the cappuccino spout and then from the the milk frother. Is this how it is supposed to work? Because now when I am running the cappuccino rinse, I see water falling directly into the tray and then from the milk frother..

      Sorry for the long post, but I wanted to explain what I have done so far.


      Mechanische Kenntnisse vorhanden: JA | Elektrische Kentnisse vorhanden: JA | Messgerät vorhanden: JA
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    • Oh wow...

      Unfortunately, I can't really answer that 100%, as it's been so many years since I've had a Z7 on my table.

      Basically, when "rinsing," the water should only come out of the coffee spouts in the middle and on the sides, and not from the frother itself. Likewise, when rinsing the frother, it shouldn't come out of any coffee spout, but only from the frother.

      However, it's normal for water to be directed into the bowl during certain program steps during rinsing programs, but itá also depending on the machine model.

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • Thanks for the quick reply .

      Ok , so let try to explain better. During normal startup rinse, I get water from the normal coffee spouts but nothing from the cappuccino spout on the side. Same thing happens when I do a machine rinse.

      When I do a cappuccino rinse, I only get water from the frother , but no water from the cappuccino spout.

      When I do a machine clean, I get water from all 3 coffee spouts. Also when I choose cappuccino or latte macchiato it works normally.

      I'll try to post some videos ...

    • Hello.

      dieni1234 schrieb:

      During normal startup rinse, I get water from the normal coffee spouts but nothing from the cappuccino spout on the side.
      This is Jura-Standard and completely normal.

      dieni1234 schrieb:

      Same thing happens when I do a machine rinse.
      This is completely normal depending on the machine type and software version of the Jura-Machine. Apparently also with the Z7.

      dieni1234 schrieb:

      When I do a cappuccino rinse, I only get water from the frother , but no water from the cappuccino spout.
      This Jura-Standard and completely normal.

      dieni1234 schrieb:

      When I do a machine clean, I get water from all 3 coffee spouts. Also when I choose cappuccino or latte macchiato it works normally.
      Then everything seems to work exactly as it should.

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • Hello there,

      Yes, at the end its normal behavior from the ceramic valve.

      The ceramic valve is switching position to/over the heat exchanger to release/drain any steam/pressure during machine shutdown into the water tray.

      Should make a "hiss" sound over the heat exchanger. That is an indicator that the heat exchanger is not clogged. Well, at least not completely clogged.
      Starr mich nicht so an, ich bin auch nur eine Signatur
      Habe ich geholfen? Dann bitte liken. :thumbup:

      Küche: Jura Z7 :)
      Zur Zeit in Behandlung:
      Zum Verkauf:

    • I'm on the highway right now without headphones.

      It is sounding normal to me.

      I'm just missing some "Click" sound produced from the brew group during movement.

      During the cleaning you have realised that if the lower piston is getting moved over the predetermined direction it has to pass a kind of a ratchet lock on both sides.

      komtra.de/forum/index.php/Attachment/2704-PICT0021-JPG/

      I will double check again later with headphones.

      But in general it sounds ok. Is the machine housing closed or open?
      Starr mich nicht so an, ich bin auch nur eine Signatur
      Habe ich geholfen? Dann bitte liken. :thumbup:

      Küche: Jura Z7 :)
      Zur Zeit in Behandlung:
      Zum Verkauf:

    • apejovic schrieb:

      I'm on the highway right now without headphones.

      It is sounding normal to me.

      I'm just missing some "Click" sound produced from the brew group during movement.

      During the cleaning you have realized that if the lower piston is getting moved over the predetermined direction it has to pass a kind of a ratchet lock on both sides.

      komtra.de/forum/index.php/Attachment/2704-PICT0021-JPG/

      I will double check again later with headphones.

      But in general it sounds ok. Is the machine housing closed
      Housing is closed. When I moved the brew group manually I could hear those clicks, but they were pretty faint. Awaiting your response, thanks again.

    • If you have something to heat up carefully these latches to bend them up a little bit more so that the "click" is getting louder.

      It will secure the lower piston to not run "backwards".

      This can happen if these latches are not blocking a backward moving.

      A hot air iron with adjustable temperature would be the best.

      I use about 120-140°C.

      I also used a normal heat gun for that job. But you have to be very carefull. As soon the latches are getting "shiny" its time to stop the heating and bend them with a flat screw driver.
      Starr mich nicht so an, ich bin auch nur eine Signatur
      Habe ich geholfen? Dann bitte liken. :thumbup:

      Küche: Jura Z7 :)
      Zur Zeit in Behandlung:
      Zum Verkauf:

    • Thanks for the tip. I'll look into it when I get some time to dismantle the machine again.

      Since you have a Z7, could you please confirm the cappucino rinse, if water comes out from the coffee spout on the cappuccinatore?

      Also, I saw in some threads in this forum, that people were recommended to service the output valves etc.. is this necessary? What would happen if these had problems in the first place?

      apejovic schrieb:

      If you have something to heat up carefully these latches to bend them up a little bit more so that the "click" is getting louder.

      It will secure the lower piston to not run "backwards".

      This can happen if these latches are not blocking a backward moving.

      A hot air iron with adjustable temperature would be the best.

      I use about 120-140°C.

      I also used a normal heat gun for that job. But you have to be very carefull. As soon as the latches are getting "shiny" its time to stop the heating and bend them with a flat screw driver.

    • It's rinsing through the frother.

      I will compare with my Z5 Gen 2 when I get it back.

      I don't remember how the rinsing was on the Gen 2.

      The Z5 Gen 1 was rinsing through the cappuccinatore coffee spout as well.
      Starr mich nicht so an, ich bin auch nur eine Signatur
      Habe ich geholfen? Dann bitte liken. :thumbup:

      Küche: Jura Z7 :)
      Zur Zeit in Behandlung:
      Zum Verkauf:

    • Hello.

      Especially with the ceramic valve: Don't touch it if it's in good working order. It's all too easy to break a connection while tinkering, and then it gets expensive.

      The pinch valve is more prone to clogging than leaking. You can take a look at it – but if everything's fine, don't touch it.

      BS
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014

    • Great, thanks for the heads up . I checked the volume outputs for the coffee and water spouts and they are both spot on. So pump etc.. look to be working fine aswell.

      I'll do some research on the grinder, to check consistency of the grind.

      One questions regarding the frother spout . is the below compatible with the Z7 , part numbers are the same, but my frother is longer it doesn't have the removable piece at the end.

      komtra.de/jura-ersatzteile/jur…-kaffeevollautomaten.html

      Thanks all for your assistance so far.

    • apejovic schrieb:



      I will compare with my Z5 Gen 2 when I get it back.
      The Z5 Gen 2 is rinsing also just through the frother.

      The Z5 Gen 1 was rinsing through Coffe spout and the cappuccinatore coffee spout during the start up rinsing or when you start the rinsing manually. Just saw an old commercial video about that machine.

      But BlackSheep is right. It can be various due to the software version.
      Starr mich nicht so an, ich bin auch nur eine Signatur
      Habe ich geholfen? Dann bitte liken. :thumbup:

      Küche: Jura Z7 :)
      Zur Zeit in Behandlung:
      Zum Verkauf:

    • Z5 GI sollte beim Startspülen nur durch die Mitte spülen.
      Bei Spülen über das Menü aus beiden Kaffeeausläufen.
      Beim Abschaltspülen jeweils dadurch wo ein Bezug stattfand.
      Zumindest bei meiner Softwareversion war das so.
      Ich hatte 10 Jahre eine Z5 GI Chrom in der Küche…
      Immer logisch und Schritt für Schritt vorgehen. Blinder Aktionismus kostet Zeit und Geld.
      Küche: Jura GIGA 5 Pianoblack-Chrom Bj: 2012
      Büro: [sJura GIGA X3 ALU Bj: 2014
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