111B Pump Problem

Discussion in 'Fettling Forum' started by The Warrior, Jul 8, 2023.

  1. hikerduane

    hikerduane Subscriber

    Online
    Joined:
    Mar 1, 2010
    Messages:
    10,861
    Location:
    Plumas County, CA
    Ditto, only thing I don't like is the type of clip needed to keep the cup on the shaft. Don't think anything else can work well outside of a shaft from older models.
    Duane
     
  2. The Warrior

    The Warrior United States Subscriber

    Offline
    Joined:
    Dec 5, 2019
    Messages:
    3,053
    Location:
    Illinois, USA
    kerry460 made a conversion kit. Seems to work with the clip:

    Optimus 111T
     
  3. The Warrior

    The Warrior United States Subscriber

    Offline
    Joined:
    Dec 5, 2019
    Messages:
    3,053
    Location:
    Illinois, USA
    BTW, does anyone have a good way of removing the retainer clip?
     
  4. 69T100C

    69T100C United Kingdom Subscriber

    Offline
    Joined:
    Jan 10, 2021
    Messages:
    49
    Location:
    Seaton Devon.
    The top one is “Ye Olde” leather one.
    Second one down is O-ring version.
    Third one down is an O-ring pump shaft that I’ve machined to take a leather valve setup, currently available from a UK eBay vendor. If you look carefully to the left of the 4mm Nyloc nut, you’ll see a slight undercut in the 0.193” (4.9 mm) machined dia. - that’s from the original manufacture.
    Fourth one down is from Base-Camp, unusual for their normal high quality, the piston is fixed - does not float to act as an air valve on the back stroke.
    If you know of any model engineers in your locality - it’s a really easy mod.
    You might need to give it an extra pump stroke, to compensate for the slight reduction in shaft length.
     

    Attached Files:

  5. The Warrior

    The Warrior United States Subscriber

    Offline
    Joined:
    Dec 5, 2019
    Messages:
    3,053
    Location:
    Illinois, USA
    Nobody has a good way to remove the retainer clip?
     
  6. Tony Press

    Tony Press Australia Subscriber

    Offline
    Joined:
    Jun 8, 2013
    Messages:
    10,858
    Location:
    Stinkpot Bay, Howden, Tasmania, Australia
    @The Warrior

    I use a small spanner or screw driver on the top side of the clip, and tap the spanner with a peening hammer to manoeuvre the clip off. Oil the shaft.

    Tony
     
  7. Harder D. Soerensen

    Harder D. Soerensen United States Subscriber

    Offline
    Joined:
    Oct 24, 2017
    Messages:
    2,156
    Location:
    Denmark
  8. The Warrior

    The Warrior United States Subscriber

    Offline
    Joined:
    Dec 5, 2019
    Messages:
    3,053
    Location:
    Illinois, USA
    @Tony Press

    I didn't realize it was that easy, haha. Thanks.

    @Harder D. Soerensen

    Thanks for the offer, appreciate it. I cancelled my order for viton o-rings, as I have another solution on the way.
     
  9. The Warrior

    The Warrior United States Subscriber

    Offline
    Joined:
    Dec 5, 2019
    Messages:
    3,053
    Location:
    Illinois, USA
    Does anyone know where one can purchase a push on nut for the 111B pump rod?

    [​IMG]

    [​IMG]
     
    Last edited: Jul 15, 2023
  10. Harder D. Soerensen

    Harder D. Soerensen United States Subscriber

    Offline
    Joined:
    Oct 24, 2017
    Messages:
    2,156
    Location:
    Denmark
    Hi @The Warrior
    Best, fastest and cheapest option is to measure the diameter of the pump rod and then search for “Starlock Washer” with the correct measurements.
    Worked for me, when fettling a couple of the older MSR burners.
     
  11. The Warrior

    The Warrior United States Subscriber

    Offline
    Joined:
    Dec 5, 2019
    Messages:
    3,053
    Location:
    Illinois, USA
    @Harder D. Soerensen

    Thanks!

    The pump rod end measured 3.9 mm where the clip goes on according to my calipers. I'll google it.
     
  12. The Warrior

    The Warrior United States Subscriber

    Offline
    Joined:
    Dec 5, 2019
    Messages:
    3,053
    Location:
    Illinois, USA
  13. Harder D. Soerensen

    Harder D. Soerensen United States Subscriber

    Offline
    Joined:
    Oct 24, 2017
    Messages:
    2,156
    Location:
    Denmark
  14. kok

    kok Switzerland Subscriber

    Offline
    Joined:
    Oct 26, 2021
    Messages:
    98
    Location:
    Geneva, Switzerland
    I hate this kind of shaft, my Optimus 111t has now a threaded one.... Homemade.