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Rocket Giotto (2009) Leaking Group

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  • Rocket Giotto (2009) Leaking Group

    Hi Guys,

    Looking for some advice and recommendations on our Rocket Giotto.

    It's about 11 years old and hasn't been serviced in approx 5 years (but descaled regularly).

    After heating in the morning for our morning caffeine hits, we've noticed that it takes some time (5-15 seconds) before the water comes out of the screen, and only steam comes out, and when it does, it does it tends to spit the water from the screen. In addition to this it does appear to drip water from the drain valve, as the tray gets full quite quickly.

    After some googling, I found the following post on another site which appears to be the same issue.

    https://www.home-barista.com/espress...ly-t12391.html

    I'm assuming that it may be the "upper valve gasket", but would appreciate any feedback / experience from this forum. In addition, the lever has about 10 degrees of play in it, as I'm assuming the cam on the cam rod is worn.

    Looks like I will need to put a rebuilt kit through it, but want to ensure that I get the correct one, and appreciate anyones recommendations on what/where to get one from.


    Cheers!

  • #2
    Coffee Parts have detailed Rocket diagrams available online to indentify the parts you need and they can supply them all too. 5 years since a service is a long time though, all the group and lever gaskets, seals and valves will need an inspection. Tap valves and seals should be checked too whilst at it. There are some very useful Rocket group service videos on YouTube. Good Luck.

    Comment


    • #3
      You might have to talk to Pedro or one of the staff about an E-61 Rebuild Kit as I don't think it is listed as an item...

      Mal.

      Comment


      • roosterben
        roosterben commented
        Editing a comment
        Yeah that kit is 100% perfect fit I have a 2009 Giotto Premium Plus V2 and fitted one of these a few months ago. They may have the parts separately as well so you could just make it up, I didn't end up using all the parts.

        The other part you probably want to replace is the E61 cam https://www.coffeeparts.com.au/parts...group-stem-cam

      • Dimal
        Dimal commented
        Editing a comment
        Yeah, I was referring to a specific Rocket Rebuild Kit, which is not listed.
        Always wary of recommending anything that isn't specific to a particular manufacturer's Group as there are differences between them, mostly to do with the valves, seats, etc which will not fit or function properly if you get it wrong...

        Mal.

      • TimK
        TimK commented
        Editing a comment
        Thanyou all for the feedback. Now off to ring CP, to see if they can sort me out with a rebuild kit.

    • #4
      In terms of the issues could it be you 2 way solenoid is sticking?

      Also you probably should have a look and at least clean you anti-vac valve. These can get a bit sticky, if it is pretty much shot add one to your list.

      Comment


      • TimK
        TimK commented
        Editing a comment
        I resealed the vacuum breaker valve a few years ago when one of the seals stopped sealing, and would allow the machine to build pressure, and has been working fine since. I will recheck it again, when I reseal the group, which appears to be the next step based upon the feedback received.

    • #5
      When you say that you "resealed the vacuum breaker valve", what exactly did you do?

      Comment


      • TimK
        TimK commented
        Editing a comment
        I removed the vacuum breaker valve, and found out that the small o-ring that is in it had split. Went to my local o-ring supplier with the o-ring, and they found a suitable replacement (suitable for high temps.)

      • Lovey
        Lovey commented
        Editing a comment
        Cool, I had a slight concern when you said that it had been sealed, that it might have really been 'sealed', as in sealed shut.
        Last edited by Lovey; 3 weeks ago. Reason: Additional info.

    • #6
      Time to pull the entire group and valves down and give the machine a little love after 5 years. This should have been done more like 3 times in that timeframe. Regular descale by throwing acid at metal? Did it actually need it and if so, why not address water quality instead?

      Rick is your man....


      Comment


      • TimK
        TimK commented
        Editing a comment
        Great video. Thanks. We haven't descaled very regularly as I'm not a fan of throwing acid at metal as you said, noting we don't have any water quality issues. Main issue with the machine is seal deterioration, and just wanting to ensure that we remove any coffee oil build-up to ensure we have the correct flow of water throughout the machine.

    • #7
      TimK: Are you still having those issues?

      Leaking from the group while on can be the rubber gasket on the top valve. I just fixed this on a machine I did a big refurb on. You might find the 3 metal valves are fine and just need a scrub and sit in descaler for a few hours, what you need to do is using a pick or something and remove and replace the rubber seal from each valve. Often you will have to remove to top rod of the valve and the metal washer to get the seal out.

      The steam through the group is another matter could be a pressure stat which is set wrong (too high boiler pressure and temp). Or your pressure stat is on the way out. Also over that period of time the other possibility is the anti-vac valve is stuffed. Over 11 years the anti-vac valve should have been replaced, they are only a $25 part and the genuine Rocket works the best I have found with the Rocket machines.

      Also descaling the group is much different to a boiler descale, you pretty much just pull the bits apart and chuck them in acid and water overnight. The most annoying thing as shown is clean the inside of the group once the valves and other bits are removed. I picked up some wire brushes for my impact driver based off how Rick does the internal cleaning in the above video.

      The video Caffeinator linked is excellent in terms of E61 group servicing and Rick is one of the best coffee technicians in the world.
      Last edited by roosterben; 3 weeks ago.

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