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Argonaut Kraken exhaust loop flooding issue...?

Discussion in 'Vintage Equipment Diving' started by Fibonacci, Oct 5, 2018.

  1. lexvil

    lexvil Loggerhead Turtle

    # of Dives: 1,000 - 2,499
    Location: jamestown, ca.
    1,467
    987
    113
    Mine does look similar, I may still have the first one that Bryan switched out and will look for it. It may be just a bad material thing, I just don’t know but everything fits perfectly where they are intended to fit, that is to say with proper clearance because if I said tight some may draw an improper conclusion. These are a long established reliable design so it is most likely a supplier issue, I just don’t know but I will keep a close check on the IP.
     
    Fibonacci likes this.
  2. Fibonacci

    Fibonacci Manta Ray

    # of Dives: 500 - 999
    Location: Melbourne, Australia
    547
    448
    63
    Yes it is pointing more to a supplier issue, and since yours is also a 2017 model it would very likely have had the same batch of cans and HP seats... hence similar failure modes.
     
    lexvil likes this.
  3. Fibonacci

    Fibonacci Manta Ray

    # of Dives: 500 - 999
    Location: Melbourne, Australia
    547
    448
    63
    @John C. Ratliff raised a good point (see p 6) that another Kraken owner has actually experienced over on the VDH Forum...
    Posted by Tripplec
    Now that summer is peeking through the clouds, if any of you guys have not solved your hose flooding issue on your Kraken, might be your DBE valve sticking to your main diaphram. Look through the exhaust ports with a flash light after you get it wet and give it a breath. Mine would suction cup itself repeatedly. I did a trial fix of a small amount of silicone sealant (verry small line) on the main diaphram to prevent the mushroom valve from creating a suction. I have not had any issues since. Might be a better way, but as long as I'm dry, I'm happy.

    Standoff bosses and ribs on the diaphragm teamed with a boss and radial 'anti-sticktion' pips on the exhaust valve are features of the Nemrod Snark III.
    Maybe trial punching out a small silicone rubber disc and sticking it to centre of the Kraken diaphragm as another option?
    Bonding silicon rubber to silicone rubber ain't easy but it can be done
    Bond, don't glue silicone rubber - Tech-Bond Molecular Bonding System
    Small radial ribs and a standoff boss would be a simple metal-off tool mod for the Kraken silicone diaphragm if it works...
     
    John C. Ratliff and couv like this.
  4. lexvil

    lexvil Loggerhead Turtle

    # of Dives: 1,000 - 2,499
    Location: jamestown, ca.
    1,467
    987
    113
    Did an 80 minute dive with the Kraken today, no issues on the exhaust loop, for the record I did 3 things, lapped the DBE surface, put a G250 mushroom valve in place of the original and siliconed a deflector near the DBE, I think that last one was on page 7.
     
    John C. Ratliff, couv and Fibonacci like this.
  5. Fibonacci

    Fibonacci Manta Ray

    # of Dives: 500 - 999
    Location: Melbourne, Australia
    547
    448
    63
    Thanks @lexvil
    For my positive results the exhaust seat had been resurfaced, original mushroom valve, no DBE deflector.

    We will need to do a few more dives to try and confirm if it is solely the distorted exhaust seat causing the flooding issue or in combination with the diaphragm suctioning the exhaust valve up intermittently.
     
    John C. Ratliff, couv and lexvil like this.
  6. lexvil

    lexvil Loggerhead Turtle

    # of Dives: 1,000 - 2,499
    Location: jamestown, ca.
    1,467
    987
    113
    I’ve covered both but with 3 approaches, I’ll pull the fence out before I dive it again, I think the seat it the main issue.
     
    John C. Ratliff and Fibonacci like this.

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