• Welcome to ScubaBoard


  1. Welcome to ScubaBoard, the world's largest scuba diving community. Registration is not required to read the forums, but we encourage you to join. Joining has its benefits and enables you to participate in the discussions.

    Benefits of registering include

    • Ability to post and comment on topics and discussions.
    • A Free photo gallery to share your dive photos with the world.
    • You can make this box go away

    Joining is quick and easy. Login or Register now by clicking on the button

Si tech inflator valve

Discussion in 'Repairing your own Gear' started by Daved222269, Sep 23, 2020.

  1. Daved222269

    Daved222269 Nassau Grouper

    # of Dives: 200 - 499
    Location: Cleveland Ohio
    138
    31
    28
    04F9E481-5DAB-40A5-BB45-99DCEC301865.jpeg CF246871-EE26-4153-ABB5-975A87B697D5.jpeg Trying to rebuild a si tech skeleton inflator valve. Can’t find detailed instructions, I don’t want to break this taking it apart. I removed the logo decal, then used two Allen keys to break loose front screw and “washer”. On the back side there’s a hex nut, spring and internal parts under that. How do you remove the hex piece from the back side?
    Thanks.
     

    Attached Files:

  2. fmerkel

    fmerkel Loggerhead Turtle

    # of Dives: 1,000 - 2,499
    Location: Salish Sea (Seattle)
    1,737
    702
    113
    There's probably a proprietary thin walled large socket that fits it (#^#@$@#). Like most people I don't have THAT tool, and don't want to find it.

    I used a pair of needle nose vise-grips to get a bite on it. Regular pliers and vise grips can't fit in there. It just unscrews normally but can be tight if it's been in there awhile (likely). and not being able to get a good grip on it makes the problem more frustrating. Once you get the nut off the center part just pushes out. 2 O-rings. Simple clean, lube, and replace.

    After a couple re-builds with THAT annoyance I took a cutting wheel and cut, then filed 2 large grooves in opposite sides of the 'nut' that the vise grips could get a solid, easy grip on You could also grind 2 flats down a LOT. There's more than enough metal on that nut.
     
  3. Daved222269

    Daved222269 Nassau Grouper

    # of Dives: 200 - 499
    Location: Cleveland Ohio
    138
    31
    28
    Ok, makes sense. Kinda what I thought, tried to fit sockets but they’re too thick. I ground down a special scubapro socket once already. I’ll try some pliers, or maybe make another socket. Thank you for the good info.
     
    fmerkel likes this.
  4. fmerkel

    fmerkel Loggerhead Turtle

    # of Dives: 1,000 - 2,499
    Location: Salish Sea (Seattle)
    1,737
    702
    113
    IMO there is absolutely no good reason for THAT stupid nut other than discouraging DIY from working on it. Some of their 'almost' identical valves have a simple socket fitting instead of a nut. Too easy.
     
    shoredivr likes this.
  5. drk5036

    drk5036 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 100 - 199
    Location: Sapporo, Japan
    605
    495
    63
    This could also be a good project for 3D printing. Just measure the size of the nut and print a tool for it!
     
    rboban likes this.
  6. happy-diver

    happy-diver Skindiver Just feelin it

    # of Dives: 1,000 - 2,499
    Location: same ocean as you
    1,519
    960
    113
    and from what material would you print your 1mm walled socket
     
  7. Zef

    Zef Divemaster

    2,653
    2,115
    113
    One could always take a Dremel with a cutting disk and cut a groove in the face of the fastener and then use a wide flat-head screwdriver to loosen/tighten it.

    -Z
     
    DivingColeridge likes this.
  8. Alastor

    Alastor Liveaboard

    # of Dives: 200 - 499
    Location: Italy
    333
    85
    28
    Probably grinding a normal socket would fit, just grab a cheap one with the 1/4 " or 1/2" hex socket and go easy.
    I don't think the nut is deadly tightened.
    just my 2c.
     
    fmerkel and rsingler like this.
  9. drk5036

    drk5036 ScubaBoard Supporter ScubaBoard Supporter

    # of Dives: 100 - 199
    Location: Sapporo, Japan
    605
    495
    63
    My current 3D printer can do hard plastic down to 25 micron accuracy.
     
  10. happy-diver

    happy-diver Skindiver Just feelin it

    # of Dives: 1,000 - 2,499
    Location: same ocean as you
    1,519
    960
    113
    Fantastic, grind down a socket mate, but importantly also flatten the face
     
    rsingler likes this.

Share This Page