End cap seal failures

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  • scubaed1911
    Lieutenant, Junior Grade
    • Jul 2019
    • 45

    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"
  • He Who Shall Not Be Named
    Moderator
    • Aug 2008
    • 12253

    #2
    Originally posted by scubaed1911
    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
    Who is John Galt?

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    • trout
      Admiral
      • Jul 2011
      • 3545

      #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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      • scubaed1911
        Lieutenant, Junior Grade
        • Jul 2019
        • 45

        #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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        • biggsgolf
          Captain
          • Jan 2020
          • 720

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

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          • scubaed1911
            Lieutenant, Junior Grade
            • Jul 2019
            • 45

            #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"

            Comment

            • biggsgolf
              Captain
              • Jan 2020
              • 720

              #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:

              Comment

              • He Who Shall Not Be Named
                Moderator
                • Aug 2008
                • 12253

                #8
                Originally posted by scubaed1911
                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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                Who is John Galt?

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                • biggsgolf
                  Captain
                  • Jan 2020
                  • 720

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

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                  • biggsgolf
                    Captain
                    • Jan 2020
                    • 720

                    #10

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                    • RCSubGuy
                      Welcome to my underwater realm!
                      • Aug 2009
                      • 1768

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

                      Bob

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                      • scubaed1911
                        Lieutenant, Junior Grade
                        • Jul 2019
                        • 45

                        #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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