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End cap seal failures

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  • End cap seal failures

    What's the best way to install/seal which runs thru end caps to prevent leakage? Two of my seals thru endacp (they appear to be a synthetic rubber material) leak, and the seal from servo to rudder control separated from my endcap completely. Thanks!
    If you're part of the particulate, then you're not part of the solution"

  • #2
    Originally posted by scubaed1911 View Post
    What's the best way to install/seal which runs thru end caps to prevent leakage? Two of my seals thru endacp (they appear to be a synthetic rubber material) leak, and the seal from servo to rudder control separated from my endcap completely. Thanks!
    Are these the 1/4" diameter resin seal bodies that accept 1/16" pushrods? If so I have a few here you can have.

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    David
    Resident Luddite

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    • #3
      In David's green photo above the first item is using a cup seal (great for prop shaft) and the other two are o-rings cast in resin. Those are typically for pushrods, but some also use for prop shafts.
      Peace,
      Tom
      If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

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      • #4
        Thanks David and Tom! I'm interested if you're parting with those! And yes, the 1/4" seal bodies to accept 1/16" rod.

        Ed Frank
        864 361 7510
        Last edited by scubaed1911; 05-19-2021, 09:09 AM.
        If you're part of the particulate, then you're not part of the solution"

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        • #5
          As David shows here, easy to replace, I find inserting a 1/16” rod helps inserting into encap

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          • #6
            Thanks! Are these a friction-fit or are the sealed? If sealed, what with?

            Is there a commercial source for these? Haven't seen offered at the DryDocks.

            Thanks!
            If you're part of the particulate, then you're not part of the solution"

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            • #7
              I use RTV Silicone Gasket Adhesive Permatex 81724
              The actual seals are only by David or Bob. Bob posted a video on making your own:
              https://youtu.be/sjuMFJOgMJU

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              • #8
                Originally posted by scubaed1911 View Post
                Thanks! Are these a friction-fit or are the sealed? If sealed, what with?

                Is there a commercial source for these? Haven't seen offered at the DryDocks.

                Thanks!
                The seal bodies within the motor-bulkhead? If so, they are secured with RTV adhesive.

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                Resident Luddite

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                • #9
                  Email Bob @Drydocks and he may have some. He generally replies the following morning

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                  • #10
                    https://youtu.be/CgennjAYYm4

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                    • #11
                      Was just about to post the link up! Thanks for saving me the trouble!

                      Bob

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                      • #12
                        Bob, the seal that popped out from aft bulkhead had no indications of sealant on it!

                        Anyway, I may have a few seals coming from David, and will seal appropriately. Thanks
                        If you're part of the particulate, then you're not part of the solution"

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