Broken tags, MSR blue and red pump

Discussion in 'Fettling Forum' started by presscall, Feb 21, 2020.

  1. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    I acquired the pump with the stove featured HERE.

    By ‘tags’ in the title I mean the two lugs on the pump body that the pump end cap locks onto.

    Each one broken off on mine, the norm with ‘blue and red’ pumps of the era (1978) and a number of versions since, the ‘grey and black’ ones for example.

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    Heavy and incessant rain for days put me off a hike - retired bloke - workshop - brass plumbing fitting already hacked at for some project or other. All came together to explore an idea I had.

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    A couple of hours with Dremel, needle files and silbrazing kit and I ended up with this. I intentionally left the inside surface roughly machined and of a diameter to grip the blue pump body housing in an interference fit.

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    It fits over the end cap in this manner.

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    The pump knob had to be removed to get access to the end cap and to install the brass ‘fixer’.

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    Pressed in place, the interference fit holding it securely, but it can be prised off and re-installed should I need to replace the pump washer. I installed a new pump washer to make that a while off.

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    Try-out coupled up with MSR fuel bottle and the ‘August 1998’-dated Dragonfly stove.

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    Last edited: Feb 21, 2020
  2. Ian

    Ian Subscriber

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    Nice work, as ever, John. :)
     
  3. anfeng

    anfeng SotM Winner Subscriber

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    Very good repair work, this fault should have been encountered by others, your excellent repair work provides others with a solution to the problem, thank you for posting it here! best regards

    Anfeng
     
  4. Twoberth

    Twoberth United Kingdom Subscriber

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    I know the feeling!

    You have produced another great fettling solution using a scrap fitting, common workshop tools, skill and creative thinking.
    Thanks John, inspirational as always.
     
  5. theyellowdog

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    Great work. Ready for a few more years of use.

    I did a similar repair a year or two back, I still have the but, but haven't used it enough to know about long term durability. I no longer have a stove to go with it.

    MSR Pump Broken lugs repair
     
  6. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    Thanks @Ian , @anfeng @Twoberth , @theyellowdog .
    If someone does, I’ll point out a detail I didn’t explain above.

    In one of the photos of the ‘fixer’ ring there’s a cut-away visible that I made in the rim with an abrasive wheel in the Dremel.

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    It’s to provide clearance for the profile of the pump outlet on the stove body and ensures the fixer ring can be pressed onto the stove body as far as possible.

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    Of course, I replaced all the seals on the pump, including the NRV check ball and spring.

    Probably the blue and red pump hasn’t had a work-out for some years.

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    Dragonfly excellence, a great simmer setting.

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    All that power and versatility from the ‘DG’ jet.

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    Last edited: Feb 21, 2020
  7. snwcmpr

    snwcmpr Subscriber

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    There is no lack of imagination. Well done John.
     
  8. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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  9. Tony Press

    Tony Press Australia Subscriber

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    Excellent!

    Cheers

    Tony
     
  10. Harder D. Soerensen

    Harder D. Soerensen Denmark Subscriber

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  11. ROBBO55

    ROBBO55 Subscriber

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    Excellent repair John. Brass is such a versatile material. :thumbup:
     
  12. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    Cheers @Tony Press , @Harder D. Soerensen , @ROBBO55 .
    It’s great stuff right enough.

    Plaque on a wall in the vicinity of Tintern Abbey UK marks the foundation of a thriving 16th century brass industry in the locality.

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  13. Simes

    Simes Subscriber

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    I bet the Wye is a lot closer to the plaque at the moment than when you visited John.
     
  14. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    @Simes
    I’ll bet it is! Water, a navigable river and the potential for water-powered machinery - in modern times a Pelton wheel no less - was the attraction to industry for that location. Too much water right now alas.