very hard thread

Discussion in 'Fettling Forum' started by Jose, Aug 28, 2020.

  1. Jose Venezuela

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    Due to obstruction I tried to disarm the Nova + system. it was so strong that I couldn't unscrew it. Then by shaking the self-cleaning system, shaking it from one side to the other and with air pressure using the same pump and bottle system, I managed to make it work since with the magnetized tool I did not achieve a good result.
    what worries me is that trying to unscrew it will damage a little as seen in the photo.
    I wonder what I should do to be able to loosen that part and properly clean the system. It occurs to me to do it with pressure and nitrogen without disassembling.
    If I heat the system with fire, would it be an option to loosen the thread? What do you advise me?

    Is the thread normal or reverse? DSCN3123.JPG
     
  2. Sternenlicht

    Sternenlicht Subscriber

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    Hej @Jose,

    'Heat and quench' with a torch and water or cooling spray and boiling water. Take a screw driver or the original tool which should fit exactly into the slit. It is a normal thread.

    Ciao, Bastian
     
  3. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Hi @Jose i have a Nova stove incorporated into a Nomad stove. In the past I have had problems with blockages in the fuel feed, even when using good quality, clean fuel:

    I had to check and clean the whole fuel feed system, not just the jet and magnetic cleaning needle:

    From this thread:

    Nomad Nova Multi Fuel Stove

    Best Regards,
    Kerophile.
     
  4. Jose Venezuela

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    @Sternenlicht, @kerophile Excellent!!! thank you very much for your effective response. that will be the procedure to follow. I hope to do it tomorrow.
     
  5. snwcmpr

    snwcmpr SotM Winner Subscriber

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    Be cautious about heat and quench. Stove parts might crack. I have had that happen with a lantern preston loop.
     
  6. Jose Venezuela

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    interesting I will take it into account
    Risks based on experience are very important.
     
  7. Sternenlicht

    Sternenlicht Subscriber

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    For breaking the bond you don't need high temperatures, but a sudden fall of temperature. In case of boiling water and cooling spray you have differences of nit more than 130K maybe. By doing it with a torch you don't need to bring it to glowing red, rising the temperature a but should be enough in that case.

    Ciao, Bastian