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Lelit PL41 went pop and started leaking at group head

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  • Lelit PL41 went pop and started leaking at group head

    Hi all,

    My trusty Lelit PL41 went pop while I was backflushing, and water started coming out from around the group head. It popped once the pressure gauge started showing around 10 bar.

    Everything else seems fine.

    Is this just a case of needing a new O ring?

    And is the there a recommended Perth site sponsor? It looks an easy fix, but by the time I get the parts in, or might not be much more to get it done by a pro.

  • #2
    When you say "went pop" do you mean the portafilter fell out of the group head? If so did you lock it in tight enough? If the seal is getting older you may need to move the handle further to achieve the same seal.

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    • #3
      No, it stayed on. The pop was just from the sudden release of pressure. If I turn it tighter, it delays it a bit from releasing the pressure, but eventually the seal gives way.

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      • #4
        Sounds like you need a new group head seal.

        https://www.jetblackespresso.com.au/...oup-head-seal/

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        • #5
          Originally posted by level3ninja View Post
          Sounds like you need a new group head seal.

          https://www.jetblackespresso.com.au/...oup-head-seal/
          Yup. That's what I was thinking, just wanting some confirmation that I wasn't stupid

          Is it just that, or are there any other bits I should do at the same time? YouTube video makes it look easy....

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          • #6
            assuming these are the same group design as the old machines, you can undo the group collar (might need thin wall 8mm socket - I ground down a spare) - 4 bolts, then the seal is exposed and easy to replace and also clean the surfaces thoroughly. These bolts sandwich the the boiler and group collar through the bottom plate, so the boiler will be a bit wobbly.

            I believe you can now get silicone seals for these.

            Cheers

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            • #7
              I'd pull the shower screen off and soak it in Cafetto. If it comes off easily and cleans up well it'll be fine to reuse but if not you may as well replace it too.

              The one I linked is silicone.

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              • #8
                Thanks all. Bits ordered from Jetblack, so I'll give it a go.

                It can't be that hard...
                Last edited by rodpinna73; 10 February 2020, 04:10 PM.

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                • #9
                  Just make sure you get rid of every last little piece of the old gasket, and and gunk build up under it. It might come off in one piece or it might come apart in your hands. Either way near enough isn't good enough when it comes to removing the old one, spend the time and do it right. Some people say to replace them every year, I usually do mine about every 2 years.

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                  • #10
                    The new Silicone Rubber one will last much longer though...

                    Mal.

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                    • #11
                      It was serviced about a year ago, so hopefully it isn't going to be too bad under there. Assuming they replaced it of course...

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                      • #12
                        The silicone one also dont tend to stick/bake on like the rubber ones too.

                        Yes as above, good practice to clean the shower screen. Its stainless so a decent scrub should see it come up good. Once you remove the middle screw, you can gently pry it from the centre to pop it out, its often stuck in the small recess of the group.

                        Cheers

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                        • #13
                          Help!

                          Got all the bits from jetblack.

                          Got the middle bolt off, and the shower screen. Removed one of the bolts that hold on the next part to come off. Seems to fit a small allen key.

                          The next one though is completely stuck. No chance of getting it move, and I don't want to round it off (if I haven't already)

                          Any suggestions!

                          EDIT: of course, after posting this, I had one more go and managed to move it. Do these screws need to be in quite so tight? Feels like the person who put these in must have been a gorilla....
                          Last edited by rodpinna73; 21 February 2020, 06:04 PM.

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                          • #14
                            Some photos might help, not sure which bolts/screws you're referring to...

                            Mal.

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                            • #15
                              It was pretty much the screw that held on the shower screen, which I had to Dremel off, and the Allen head screws that hold on the nozzle or dispersion plate under the shower screen (part MC191)

                              Either from age related build up or someone much stronger than me putting them on, all the screws were a bugger to get off.

                              All back together now and working. No more leaks

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