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Garage sale find - Scubapro MK2 First, 108 Second?

Discussion in 'Vintage Equipment Diving' started by Hethen57, Nov 19, 2018.

  1. rhwestfall

    rhwestfall Solo Diver

    # of Dives: 200 - 499
    Location: "La Grande Ile"
    12,127
    10,755
    113
    That is an older mk2, and I'd bet is is a 108 (non-HP)
     
  2. couv

    couv Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: 13th floor of the Ivory Tower
    4,623
    1,862
    113
    Nice find-great set of regulators.

    Yes.
    All the parts you need can be found at www.vintagedoublehose.com in the store section. The manuals can be downloaded from the same website from the Catalogs and Manuals section. No special tools other than perhaps a pin spanner to remove the cap.

    The MK2 is pretty bullet proof. As with any first stage, take note of the IP at low pressure (300 psi) and high pressure (2475* for the yoke you have) before disassembling it. I'm going to go against "by the book" procedure here: If the IP is in spec don't remove and replace the seat unless there is actually an issue. Carefully disassemble the first stage, replace the filter**, clean all the components. Replace and lubricate the two piston o-rings (-008 on the piston stem, -022 for the head.) Put it back together and recheck the IP as before. No leaks? No IP creep? Congratulation, you have a typical MK2.

    * There is a SP Bulletin that explains the thinner yoke is not to be used with a tank pressure of over 2475 but that's your call. Plenty of people have used that yoke on 3000psi tanks with no problems-but if you do it, it will explode and put a divot in the back of your head.

    ** If the first stage was rebuilt prior to being stored with the dust cap in place, my vote is to reuse the filter.

    Good luck and keep us posted.

    Edit: Here is a link you will find helpful-chock full of info on the 108 and how to service it.
    Scubapro R108 High Performance -manual
     
    rhwestfall likes this.
  3. couv

    couv Instructor, Scuba

    # of Dives: 1,000 - 2,499
    Location: 13th floor of the Ivory Tower
    4,623
    1,862
    113
    The 108/108HP are classic downstream unbalanced second stages.
     
    rhwestfall likes this.
  4. shurite7

    shurite7 Dive Shop

    # of Dives: 1,000 - 2,499
    Location: MT
    892
    334
    63
    Yes, you are correct. My typo error.
     
    couv likes this.

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