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How to Change Seals: The Ponte Vecchio Lusso Way!

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  • speleomike
    replied
    Hi

    PV here as well. Its still OK after many years. Perhaps get seals for more than one person? How much would they be?

    Leave a comment:


  • abuch47
    replied
    Im still here. Still havnt got more seals, left is shit, right is perfect. no response from sorrentina so will have to purchase from italy for bulk dollarydoos

    Leave a comment:


  • 3rutu5
    replied
    Great guide. what happened to everyone who was PV owners? seems like they got over the machines and moved on?

    Leave a comment:


  • Jitsukablue
    replied
    Yes, I have a set of seals but haven't got around to using them. I've lost the functionality from the LHS group head, the seals on that side are stuffed (passing and spurting water out of the relief hole). So I've been living with only using the RHS group. What's interesting is the RHS group must have been machined in a tolerance sweet spot, as this group has been used for well over a year, it has the occasional slip but it goes away again.
    If we can't get hold of those seals easily, it's probably easiest just to measure up the dimensions of the bores and replace them with PTFE lip-seals.

    Leave a comment:


  • Barry O'Speedwagon
    replied
    I believe Jack home some outside issues that took up a lot of his time. I'd had trouble contacting him in December, but got a polite and apologetic email in early Jan.

    Leave a comment:


  • early_morning_
    replied
    Anyone seen or heard of Jack lately? I'm in urgent need of the magic tool and some seals to get my PVL running again, but he hasn't responded to emails.

    Did anyone ever make their own tool, or figure out a different way to do the job without the tool?

    Leave a comment:


  • Beenz
    replied
    Originally posted by Barry O'Speedwagon View Post
    Best email Jack through the contact email on the Sorrentina web site. He is around (I got a swift reply from him last Friday).
    Great, thanks for the help

    Leave a comment:


  • Barry O'Speedwagon
    replied
    Originally posted by Beenz View Post
    Hi all
    Just wondering if anyone knows if the tool is still available to change the seals?
    Haven't seen Sorrentina here fro a while......
    Best email Jack through the contact email on the Sorrentina web site. He is around (I got a swift reply from him last Friday).

    Leave a comment:


  • Beenz
    replied
    Hi all
    Just wondering if anyone knows if the tool is still available to change the seals?
    Haven't seen Sorrentina here fro a while......

    Leave a comment:


  • porter
    replied
    3d printing this tool

    Greetings-
    I have acquired a PV Lusso 2 group machine and I am loving it. Because I am not aware of the full history of the machine, I would like to replace the piston seals. That led me to this informative thread, and that led me to asking this question:
    Would it be possible to measure and post the dimensions of the hollow alloy tube, the piece that retains the seals in place during the re-insertion phase of the process?
    I am a CAD designer, and I have mocked up a version of the 'tool' used to apply the necessary load onto the spring. All that was needed for me to make that was to measure up one of my existing portafilter cups, the ears on it, and some rough measuring of the various important spots. My plan is to print this in durable ABS plastic, strong enough for the loads, and easy enough to tweak it, should it need it.
    I suppose that I could order a set of new seals and take measurements from those, perhaps I'll have to wait in order to do that. But, I also thought about making a few of the drawings from my effort, so that other folks could perhaps use the data to fabricate their own tools.
    There are a few more pieces of info that are missing from making this complete. The distance of how far it is from the bottom of the cup to the handle of the tool is important, as is the distance of travel of the turned screw, I want to get them both right, for ease of use when the tool is in place in the group, for hand fitting between the handle and the lower frame.
    I doubt that my fabrication will be pretty, but I am with you on the functionality front. If it works, especially if only rarely needed, its not about making the thing pretty. Car jacks aren't pretty.
    thanks
    p

    Leave a comment:


  • CSIPHUKET
    replied
    Hi, i just followed your instructions on changing the piston seals almost to the letter, after i made a few coffees i noticed that water was still flowing from the group head !! i am a seasoned professional coffee machine tech but little to no experience with a ponte vechio, any ideas why the water is still flowing after the lever is back in standby position ?

    Leave a comment:


  • CSIPHUKET
    replied
    Hi, new member ish. i have just replaced the piston seals on my Ponte Vechio using a very similar method described here, at first all seemed well but after i made a few coffees i noticed that water kept flowing from the group head!! any suggestions would be welcome. i may add i'm a seasoned professional coffee machine engineer on large commercial machines but i have little experience on this machine.

    Leave a comment:


  • Eyalcpa
    replied
    Hi All, I recently changed the gaskets on my Ponte Vecchio Export machine, but I ran into a problem when trying to use my clamp because it was not powerful enough, but I came up with a different way to release/install the piston using my "Car Jack"

    I wish I could post photos directly, but for some reason the forum will not allow me to do it. (Strange).



    Leave a comment:


  • B85
    replied
    Great work thanks for the guide and the descaling tip with the acid

    Leave a comment:


  • sorrentina
    replied
    Re: How to Change Seals: The Ponte Vecchio Lusso Way!

    Hello there Lace,

    I am glad it all went so well- the tool really is a gem. I had planned to have the tool sent back to one of the first recipients as they had a few slips on one group after replacing the seals. However (touching wood), the group settled in an stopped slipping so they dont think they need it now.

    From experience: the occasional slippage can happen even when the seals are fine. I had one slip last week. I think it can occur especially if you raise and lower the lever very quickly. It seems that the water pressure builds up between the bottom of the piston and the coffee puck and this pressure forces the lip of the bottom seal to seal against the cylinder wall. If the lever is released very quickly- or if the filter basket is packed too loosely- this pressure does not build and a slip can occur. A half pump or two of the lever usually makes it grip and the shot can progress...

    This is my theory anyway.

    Leave a comment:

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