Making pump leather cups. Two attempts

Discussion in 'Fettling Forum' started by pau-i-amor, May 30, 2020.

  1. pau-i-amor

    pau-i-amor Subscriber

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    This is not a "Pro" job neither a tutorial, only two simple attempts cause I couldn't find these leathers cups size. I asked for a piece of leather to local shoemaker. I realize is to much soft... but good enought. I soak a leahter cutout in water for 20 minutes before using.

    2640.JPG


    First attempt:
    For an old brass hand pump I need a 22mm diameter cup. First FOCUS stoves had not a built-in pump.


    I drilled a hole in a wooden board. First with a 20mm Diamter drill. Then with a 22mm D drill only HALF DEEP. With a sandpaper I got a tappered bore. I cut a 20mm D wooden stick and sand a conic shape in one end. Both was varnished.

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    I pressed the leather with a clamp for one night. Voilà!

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    I cut the extra leather behind the board with a cuter. It isn't a good idea...

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    I made a hole.

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    I assembled the new leather cup. Leather cup spend one night soak in oil.

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    Second attemp:
    A 34mm diameter leahter cup for a fuel tank pump. I drilled a 32mm Diameter hole and tappered a little with a sandpaper.

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    You can see the conic end of the stick.

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    Wet leather is so soft you can shape it with your fingers!

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    Soaked leather is darker than dry...

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    In this case I cut the waste with a scissors.

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    These are the pump parts. You can see the old cracked cup.

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    I assembled the new cup.

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    One night soak in oil.

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    The extra oil drops for a long time.

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    This is the result

    2734.jpg

    I reach 2kg/cm2. It's good enough for me!!!

     
  2. Ed Winskill

    Ed Winskill United States Subscriber

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    Well done.
     
  3. Tony Press

    Tony Press Australia Subscriber

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    Excellent!


    Tony
     
  4. Majicwrench

    Majicwrench Subscriber

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    I form the cup right in whatever pump tube you will be using it in.

    Good on you for getting it done. Always fun to learn something new.
     
  5. Harder D. Soerensen

    Harder D. Soerensen Denmark Subscriber

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    Well done - your post here can certain work as a tutorial!
     
  6. hikerduane

    hikerduane Subscriber

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    Nice thinking. I had to make a cup for my Governor.
    Duane
     
  7. snwcmpr

    snwcmpr Subscriber

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    Well done sir.
    :clap:
     
  8. ROBBO55

    ROBBO55 Subscriber

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    The pumps worked so the leathers look good to me. :thumbup: :)
     
  9. Metropolitantrout

    Metropolitantrout SotM Winner Subscriber

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    Looks factory :thumbup:. Well presented! Jerry
     
  10. Sternenlicht

    Sternenlicht Subscriber

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    Wow, so simple! Great idea to make the moulds from wood!

    Ciao, Bastian
     
  11. Tantra

    Tantra Subscriber

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    Good job