Optimus 11 spirit cup

Discussion in 'Fettling Forum' started by brian kinne, Aug 13, 2019.

  1. brian kinne

    brian kinne United States Subscriber

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    I recently bought a Optimus 11. Needs some work. The spirit cup came with the stove but had been removed from the stove. The cup fits over a non threaded stud at the bottom of the burner. Need to get correct washers but see no way to fasten cup to burner other than peaning over the stud. Am i missing something?
     
  2. kerophile

    kerophile United Kingdom Subscriber SotM Winner

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  3. JP2

    JP2 Subscriber

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    Can we see it? Please
    It is always easier for us to help IF we can see it.
    Thank
     
  4. Tony Press

    Tony Press Australia Subscriber

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  5. JP2

    JP2 Subscriber

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    WoW, what a nice illustration Tony
    Thank you
     
  6. brian kinne

    brian kinne United States Subscriber

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    To Tony Press,
    Great photos. Not the stove I am talking about. Have one like yours though. The spirit cup is set-up to slide on the track found on the early case. The 11 I am talking about is embossed like the 1st 111 models, nice but not as elaborate as the one you show. The cup on the one I am talking about slides directly on the case, no track like the earlier one. All I have is the cup and a non threaded stud about .110 long. With the correct washers I should have about .40 of stud remaining. My question is the only way I see to fasten the cup is to pean over the stud. Sorry for no photos. Need to buy a camera. Would sure like to see a couple photos of the case on your stove. Thanks, Brian.
     
  7. snwcmpr

    snwcmpr Subscriber

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    @brian kinne
    Can you post photos?
    Maybe you have the wrong parts.
     
  8. JP2

    JP2 Subscriber

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    @brian kinne
    Maybe you should check in the reference Galery.
     
  9. Simes

    Simes Subscriber

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    @snwcmpr, From Brian's post he's unable to take and post images.

    @brian kinne Does the complete stud unscrew from the base of the burner? The examples shown looks like the stud is threaded for a clamping nut.
     
  10. snwcmpr

    snwcmpr Subscriber

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    @brian kinne
    Look in the Gallery for a photo of the setup that you have. Maybe that can help with knowing what you are describing.
     
  11. brian kinne

    brian kinne United States Subscriber

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    Thanks folks, went to the stove reference library, Optimus, model 11. Found the same spirt cup. Look for "Optimus No 11 stove" posted by Fernando Allicea. The spirit cup is photo 5 and is exactly what I have.
     
  12. Tony Press

    Tony Press Australia Subscriber

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    Mystery solved. It does look peined to me.

    Tony
     
  13. JP2

    JP2 Subscriber

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    Ok how about that
    IMG_20190305_135019.jpg 15658141142741071738446.jpg
     
  14. Simes

    Simes Subscriber

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    Also well done Fernando for a comprhensive set of photos.

    @brian kinne, it sounds like a manufacturing error that didn't fully pein the cup and it eventually detached.

    Is there evidence of the original peining on the end of the stud?

    Clearly easily fixed.
     
  15. kerophile

    kerophile United Kingdom Subscriber SotM Winner

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    The spirit-cup shown on @Fernando Alicea Op.11 stove looks very like the spirit-cup used on its successor, the Op.111.

    If so, the spirit cup has a threaded insert and screws onto a small threaded stub to which a thin lead washer is placed.

    The lead washer is required as the spirit-cup is essentially flat bottomed, so the threads are under the meths level, when filled, and can leak.

    The washer is shown in this exploded drawing although it has no Part No.

    Optimus 111 Hiker exploded view

    I made my own, punched out from approx 1mm thick lead sheet.

    I have worked on Op.111 stoves where the spirit-cup just spun rather than unscrew from its stub. The threaded insert had detached from the spirit-cup. I got the two parts off eventually and soldered them together again, made a new lead washer, and re-attached to the threaded stub.

    If a stub has been peened it might have been an attempt by a previous owner to stop a meths leak from the bottom threaded spirit-cup. A new lead washer and re-tightening is the correct cure.

    Best Regards,
    Kerophile.
     
  16. Simes

    Simes Subscriber

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    @JP2, it looks like Optimus tried various securing solutions during the 11 production run. Perhaps the falling off problem that Brian has led to the later threaded example.
     
  17. JP2

    JP2 Subscriber

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    @Simes
    Right, I have the feeling that I will learned something new again when I will see it. Yes
    Thank
     
  18. Simes

    Simes Subscriber

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    @kerophile, my commrnts are just a bit of speculation given the description given by Brian. Without any info re threading on the stud on his example I would only assume Optimus thought peining would be adequate and a simple securing arrangement.

    Will have to await a reply from Brian I suppose, I've never dismantled a 111 to that extent to have a visual memory of the construction technique.
     
  19. brian kinne

    brian kinne United States Subscriber

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    Thanks folks. To me it sure look like it was peined on. With a new led washer the amount of stud will be just about perfect for peining. Not real experienced in this stove thing but it sure gets in your blood. The led washer is on the big auction house. Will check Fettle Box before ordering. Thanks everyone.

    The washers on eBay are not the correct size, will do some more looking and if I do not find one will try making one. In the absence of a punch the center hole could be drilled.
     
    Last edited: Aug 14, 2019 at 11:10 PM