Problem extracting NRV

Discussion in 'Stove Forum' started by Migwar, Sep 15, 2021.

  1. Migwar Lebanon

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    Hi everyone, I have a problem extracting NRV for Radius no. 35; In fact I've prepared previously a tool that worked perfectly in opening the NRV, a very low pressure down and a light turn anticlock wise made the expected sound and the NRV started turning. I was expecting it to fall by gravity after like 7 8 turns, unfortunately that didn't happen. I kept turning and turning, try after another without having it. The NRV is released, it is loosened, turns freely, and gets out 3 to 4 mm when the stove is turned to allow gravity to work on it, but it doesn't leave the spot (the end of the tube).
    I tried gently pulling it using a 4 mm wire without success. Anyone face such a problem before?

    20210915_131346.jpg 20210915_131353.jpg 20210915_111538.jpg

    Many thanks and regards,
    Migwar
     
  2. Sparky

    Sparky Subscriber

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    It happens. I have a 20 cm forceps for just this problem. Could be a split thread, a broken seal, who knows. I have only unsoldered one pump tube to get one out, though.
     
  3. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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  4. snwcmpr

    snwcmpr SotM Winner Subscriber

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    I bought several lengths of alligator forseps.
     
  5. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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  6. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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    Another option is to attach a water hose to the filler hole and use water pressure to push the loose NRV out of its hole.

    Best Regards,
    Kerophile.
     
    Last edited: Sep 15, 2021
  7. Migwar Lebanon

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    Well, many thanks everyone,@Sparky @kerophile , and @snwcmpr , will get something similar to what you've advised and will reply to this thread to keep you posted. The NRV showed good amount of resistance when I've tried to pull it.

    All the best,
    Migwar
     
  8. Migwar Lebanon

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    I will try the water hose trick as a first move, many thanks @kerophile.

    Best regards, Migwar
     
  9. presscall

    presscall United Kingdom SotM Winner SotY Winner Subscriber

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    A shallow-tapered spike (ice pick here) jammed firmly (but not destructively so!) into the NRV’s air inlet hole works for me.

    E755A6F6-98D8-4108-A550-17E71D510114.jpeg

    1EECEE3E-AEAB-4926-8B36-5D45D11AD191.jpeg
     
  10. Migwar Lebanon

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    Hi again, I managed to remove that stubborn NRV. Applied this time a bit more of force after being confident from reading the above. There is a good amount of black material behind.
    The NRV itself is one piece and I donno how to service it (It is meanwhile sitting in a bath of penetrating oil). I am thinking of giving it a try, will order new one if it is going to be a long story.
    Any ideas about it please?
    20210915_161205.jpg 20210915_161358.jpg 20210915_161250.jpg


    Regards,
     
    Last edited: Sep 15, 2021
  11. Migwar Lebanon

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    Many thanks @presscall , I've managed to do pulling it using the below, not the prettiest of tools [-X, but did the job.

    20210915_162710.jpg

    Regards,
    Migwar
     
  12. hikerduane

    hikerduane Subscriber

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    It unscrews. Should have a slot at one end for a screw driver. May or may not split the NRV when having to use too much force.
    Duane
     
  13. janders

    janders Subscriber

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    @Migwar
    A piece of leather and a pair of pliers to grip and hold the part that goes into the tank, the NRV tool to unscrew the top. Do NOT try a screwdriver on the end...

    Others have also used a chuck from a drill to hold the NRV.

    Good luck!
     
  14. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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  15. Migwar Lebanon

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    Thank you all,
    I am going to order some NRVs, this one won't work, pip destroyed, in fact it was stuck over a rusty spring (Broken later). Pictures below.

    Your contributions are much appreciated.
    I couldn't have done any step in this, and gain such experience, without your support.

    20210915_173503.jpg 20210915_173525.jpg 20210915_174159.jpg 20210915_173457.jpg 20210915_175632.jpg 20210915_175617.jpg 20210915_175557.jpg


    Regards,
    Migwar
     
  16. janders

    janders Subscriber

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    @Migwar

    Keep the old one - you know the threads are good and it fits your stove. Get this to fix it.
     
  17. kerophile

    kerophile United Kingdom SotM Winner Subscriber

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  18. Migwar Lebanon

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    Thank you very much.
     
  19. snwcmpr

    snwcmpr SotM Winner Subscriber

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    Yes, keep the original. They are made much better than the new ones.