Aladdin A1 NRV that won’t budge

Discussion in 'Fettling Forum' started by Darryl Durdin, Oct 11, 2021.

  1. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    Hi fellas, this is my days frustrating effort, all I wanted to do was remove the NRV the usual way with my slotted bolt like I’ve done plenty of times but today it would not shift, two broken easy outs #2, I’ve drilled it out bit at a time, #3 easy out still didn’t work, applied the vice and stripped the solder from the NRV end , there is only a mm of NRV left to go and it’s still not moving. Just for the record, here’s a picture of what the NRV looks like from the end of the pump tube, it’s been educational, I haven’t given up

    image.jpg image.jpg image.jpg image.jpg
     
  2. AussiePete

    AussiePete Australia Subscriber

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    Wow! that’s one stubborn NRV remnant.
    Hope you get the bugger out.
    Cheers
    Pete
     
  3. ROBBO55

    ROBBO55 Subscriber

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    G'day Darryl, I think it's time to use a tap to remove the old NRV. M8 x 0.75 is close enough to the original thread.
     
  4. James K

    James K United Kingdom Subscriber

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    Looks like you are earning your dinner today Darryl.
    If you don't have a spare you could use you will have to drill it out. It will be tricky to keep it dead centre and increase the size of the drill in as small increments as possible. When you see thread tops through the hole have a go with a tap like he said.
    Good luck James
     
  5. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    Thanks for the advice and encouragement, I did heat it up red hot with my oxy set, it’s now out but I have an egg shaped slightly where it was, I’ll heat it up again to see if I can re shape it and I’ll be looking into the re tapping thread just for the excessive and experience
     
  6. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    It’s slightly egg shape NRV image.jpg
     
  7. ColinG

    ColinG United Kingdom Subscriber

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    Bl00dy hell that was in there for the long haul! Would it be easier to find a donor tank in the long run and de-solder the complete pump tube? Had to do that with a Veritas 350 where someone had stripped the thread at the bottom. Failing that, you could make a new bottom plate and drill/tap the hole. Someone here on CPL must know the correct thread pitch.
     
  8. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    Cleaned it up, reshaped it, used buggered NRV,s to re cut thread, it’s looking better now, a bit pleased with my self for having a go image.jpg
     
  9. James K

    James K United Kingdom Subscriber

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    Well done Darryl, a big E for effort
     
  10. ColinG

    ColinG United Kingdom Subscriber

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    Blimey! Well done mate!
     
  11. hikerduane

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    I've unsoldered a few pump tubes on my Swedish stoves before a year ago being able to have someone make a NRV tool that will lock onto the pump tube so the tool can't rise off of the NRV head. I've used it now on about three old Primus 96 stoves I collect. The tubes I removed all I did was replace the pip, at least one needed the tube removed a few times until I got the pip to seal.
    Duane
     
  12. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    @hikerduane , thanks for your words of encouragement, I’m going to see it through even if it’s for sharing on the page, you don’t get to see much of this sort of action, in classic Aussie attitude I’m going to give it a go, I could have used a doner tank but that’s not half the frustrating fun that is lanterneering
     
  13. ColinG

    ColinG United Kingdom Subscriber

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    I'm with you 100% Darryl. There are times when you just need to get into some proper workshop engineering, even if half of it has to be done on the kitchen worktop! :lol: How do our poor partners put up with us!?
     
  14. hikerduane

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    Being single really helps with kitchen fettling, oven paint curing and the like inside. :)
    Duane
     
  15. ColinG

    ColinG United Kingdom Subscriber

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    You have the place to yourself then!
     
  16. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    I have had a fair go at silver soldering, it was a bit messy, but I think I may have done the job, cleaned up the NRV thread, and machined of all the dags so it could fit back in the tank BD5BDBDB-C30A-43DC-BA7A-902EFA618FDE.jpeg 11590BEE-5169-40C7-92E7-91EB90E3A264.jpeg image.jpg
     
  17. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    6424598B-DBF1-4557-B0EA-F3BF25DF58DE.jpeg 7BE9AB17-0C2E-4BE2-ADA7-EFA8B741654C.jpeg My first go at soldering in the tube
     
  18. ColinG

    ColinG United Kingdom Subscriber

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    Fingers crossed it works ok.
     
  19. Nils Stephenson

    Nils Stephenson Founder Member

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    What have you used to solder with? It looks like it has had a lot of heat. You only need to use lead solder for the pump tube.
     
  20. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    I used silver solder, I could get the lead solder to the job, kept melting, i know it looks a mess but I’ve been cleaning it up to look smoother with my dremell , it will look better when I’m done
     
  21. Fireexit1

    Fireexit1 United Kingdom Subscriber

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    Soldering, brazing and welding only get better with practice!
    Yes it could look better but if it works and you can tidy it up afterwards it will do the job.
    :thumbup:
     
  22. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    image.jpg image.jpg Thank you for mor words of encouragement.
    I’ve been cleaning it up and it’s starting to look good,
    3A36CEC3-7DE9-483C-B62A-97DF4D25088E.jpeg 0DC85E48-FE25-4B7C-9922-BE531CCDDEC2.jpeg
     
    Last edited: Oct 16, 2021
  23. ColinG

    ColinG United Kingdom Subscriber

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    That'll clean up ok and once it is, she'll be good as new!
     
  24. Walkop Australia

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    What a marathon, a job well beyond my skills. Well saved.
     
  25. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    Hi fellas I’ve made a cap so I can pressure test my tank, I’m a bit excited as to if my repairs really worked, fingers crossed 17E38411-E91A-4230-941A-D41495019985.jpeg
     
  26. Darryl Durdin

    Darryl Durdin Australia Subscriber

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    Hi fellas, well it went alright, no leaks on the tank tube part, but the NRV still had issues, either the thread part was still a bit egg shaped and the threads didn’t mesh properly or I had not soldered the end piece in good enough, it leaked air bad.
    So I got a donned tube from a stressed cracked A1 and soldered that in, problems solved, it passes the pressure test,
    I’m quite pleased with my fettle skills I’ve learnt it’s been educational C55A94B7-FA14-4F8A-9A3D-098866A8B428.jpeg
    Now on with the rest of the fettle
    I hope it’s been educational for others to see
     
  27. AussiePete

    AussiePete Australia Subscriber

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    Thanks for sharing @Darryl Durdin
    I, like many others have learnt from your experiences with this beastie.
    Enjoy the rest of the fettle.
    Cheers
    Pete
     
  28. ROBBO55

    ROBBO55 Subscriber

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    The second effort is much neater. :thumbup::thumbup::thumbup:
     

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