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Motor Bulkhead/Cylinder Union Leak

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  • #16
    Originally posted by biggsgolf View Post
    Dave, sorry, yes the O Ring seems to have a thin black bead all the way around, I was confused
    The video was useful. Yes, looks to be loose. But, again -- look at the cylinder over the O-ring: are there any cracks?

    David
    "... well, that takes care of Jorgenson's theory!"

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    • #17
      There are a couple scratches that I can feel while running a flat blade across them and yes they extend across the O Ring.

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      • #18
        And on the inside of tube

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        • #19
          Originally posted by biggsgolf View Post
          And on the inside of tube
          shallow scratches the O-ring can handle. Are you confident they are not fractures the extend to the outside of the cylinder? Look at these 'scratches' from all angles with a bright, single light source -- refraction will tell you if its a crack or scratch.

          David
          "... well, that takes care of Jorgenson's theory!"

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          • #20
            Originally posted by biggsgolf View Post
            Thanks Tom, so you put the teflon under the O Ring?
            Yes. From your video, It looks to me that your assessment that the air is getting past the o-ring is correct. If your o-ring does not have any nick or cuts in it and it did seal originally, it might be the resin shrank just a little and now the seal is not being made. Wrapping 4 - 5 times around the bulkhead o-ring channel with Teflon tape should tighten up that seal. Do not forget to re-grease your o-ring with silicon.
            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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            • #21
              Thanks Trout, Dave I will examine closely upon return to home base.

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              • #22
                Can anyone confirm the size O Ring is as pictured below? I replaced the original O Ring in may

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                • #23

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