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SP pilot regulator

Discussion in 'Vintage Equipment Diving' started by DDB, Nov 5, 2019.

  1. DDB

    DDB Angel Fish

    # of Dives: I just don't log dives
    Location: Mt/boat
    10
    8
    3
    Luis and rsingler thank you very much. Luis, can you get that into the VDH Manuals? Have not started tearing into the pilot yet, it’s my winter project when I get down to my boat. Think I read something about a ball bearing and a rocking boat.
     
    John C. Ratliff likes this.
  2. rsingler

    rsingler Scuba Instructor, Tinkerer in Brass Staff Member ScubaBoard Sponsor

    # of Dives: 500 - 999
    Location: Napa, California
    4,442
    5,540
    113
    Finally, the bottom half of the poppet retainer assembly does NOT disassemble!
    20181127_185511.jpg
    That's the flange just to the left of the orange oring where the pin protrudes.
    Despite this diaphragm that looks like the knife edge slips inside the retainer:
    Screenshot_20191106-100128_Chrome.jpg
    Part 99 knife edge is press fit inside the retainer and cannot be removed or serviced. They means that the famous "6 tiny bubbles per minute" that are "supposed to leak" from a properly tuned Pilot are actually likely a leak from a deteriorated knife edge seal against the extremely tiny oring #94.
    20181127_230421.jpg
    Can't be fixed, except by using the softest duro you can find for that oring.
     
    AfterDark, John C. Ratliff and Kupu like this.
  3. rsingler

    rsingler Scuba Instructor, Tinkerer in Brass Staff Member ScubaBoard Sponsor

    # of Dives: 500 - 999
    Location: Napa, California
    4,442
    5,540
    113
    Buy Regulator Savvy. It's all explained there in great detail.
    Screenshot_20191106-101910_Gallery.jpg
     
    AfterDark and John C. Ratliff like this.
  4. Seahuntjerry

    Seahuntjerry Instructor, Scuba

    # of Dives:
    Location: Minnesota
    163
    33
    28
    The Smallest o ring is the almost impossible on to change.I know Pete Wolfinger made a tool to line it up.
     
  5. Kupu

    Kupu . ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NC
    781
    293
    63
    I returned to this project today, and had success removing the stop. During the process, the button (shown in red square) dropped out and I did not notice which way it needs to face for reassembly.

    The button has a convex side and a flat side with tiny metal rod in center. Does the convex side make contact with the piston and flat side with rod face down towards the pilot pin, or other way around?
    pop2.jpg
     
    John C. Ratliff and lexvil like this.
  6. rsingler

    rsingler Scuba Instructor, Tinkerer in Brass Staff Member ScubaBoard Sponsor

    # of Dives: 500 - 999
    Location: Napa, California
    4,442
    5,540
    113
    The convex side up; the oring side faces down. Its very soft oring seals against the tiny inner volcano at the bottom of the poppet.
    20200829_172708.jpg
     
    John C. Ratliff, AfterDark and Kupu like this.
  7. Kupu

    Kupu . ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NC
    781
    293
    63
    Thanks! With button direction correct and tiny -002 oring installed on flat side, I then followed repair manual step 22 and put dab of silicone grease on piston end to hold button in place. Lowered the poppet over the piston and the -002 oring appears to be installed that easy?! Fingers crossed, at least for now the poppet retainer is reassembled.
     
  8. Kupu

    Kupu . ScubaBoard Supporter

    # of Dives: 1,000 - 2,499
    Location: NC
    781
    293
    63
    Project completed, a long time goal of mine has been achieved.
    Paired with MK5 and 109, this Pilot is fully rebuilt, tuned, and ready for a dive. :)

    pilot1.jpg
     
  9. rsingler

    rsingler Scuba Instructor, Tinkerer in Brass Staff Member ScubaBoard Sponsor

    # of Dives: 500 - 999
    Location: Napa, California
    4,442
    5,540
    113
    Congratulations! Looks pretty.
    But keep that chrome away from @couv. He has sticky fingers, I'm told.
     
  10. scrane

    scrane Manta Ray

    # of Dives: 500 - 999
    Location: Boise, ID.
    1,197
    898
    113
    I have the same setup with a d400 instead of the Pilot. I think the Pilot is a little too exotic for me. Sure is pretty, though.
     
    John C. Ratliff and Kupu like this.

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