Primus 230 fettle

Discussion in 'Fettling Forum' started by nmp, Jun 24, 2019.

  1. nmp

    nmp United Kingdom Subscriber

    Offline
    Joined:
    Jul 10, 2011
    Messages:
    1,296
    Bought this old stove recently and have started a renovation on it.

    91AB443D-69DB-4F1C-8958-0D03FF7342FE.jpeg

    First job was to try and pull the dent out where the riser had been pushed into the tank as can be seen in the above photo.

    I decided to try and fill it with water and freeze it and push the dent out from inside so to speak.
    New washers on filler cap and reserve lid to seal it then into the freezer for 8 hours checking on progress every now and then.

    I obviously did not get all of the air in the tank replaced with water as there was a hiss of escaping air as I removed the filler cap. So full pressure was not brought to bear on the dent by expanding ice. But some of the depression was pushed out as can be seen in the second photo, below.

    AC965D4E-76E0-455E-9F45-8DCE356234E2.jpeg

    I could try again but have decided I can live with it rather than risking blowing the tank up!
     
  2. ROBBO55

    ROBBO55 Subscriber

    Offline
    Joined:
    Oct 27, 2014
    Messages:
    847
    Location:
    Somersby, New South Wales, Australia
    Good to see the freezing method does work. :thumbup:
     
  3. shagratork

    shagratork United Kingdom Moderator Subscriber

    Offline
    Joined:
    Aug 9, 2005
    Messages:
    9,661
    Location:
    Durham, N.E. England
    I also agree about the freezing method, but few people seem to be willing to give it a try.
     
  4. nmp

    nmp United Kingdom Subscriber

    Offline
    Joined:
    Jul 10, 2011
    Messages:
    1,296
    Now have the toughest NRV ever to remove hopefully without removing the pump tube.
    I have soaked it in penetrating oil, frozen it, heated it applied brute force on the tank with the removal tool in a visa and still no joy at loosening it!

    I really want to do this without mangling the head on it!

    Now soaking in penetrating oil and meths!
     
  5. Twoberth

    Twoberth United Kingdom Subscriber

    Offline
    Joined:
    Feb 21, 2017
    Messages:
    219
    Location:
    England
    You might want to make one of these.
    Its not a substitute for soaking and patience, but it helps prevent mangling the head.
     
  6. nmp

    nmp United Kingdom Subscriber

    Offline
    Joined:
    Jul 10, 2011
    Messages:
    1,296
    Decided to give up on the NRV FOR NOW @Twoberth But have bought the bits to make a removal tool similar to yours!
    I now have the tin in an electrolysis tank to strip the horrible blue paint job!

    F1A28C73-64C0-429B-ACDC-F48F64892B26.jpeg

    D3DA7307-3C89-44D1-B91B-94242CFA6481.jpeg
     
  7. nmp

    nmp United Kingdom Subscriber

    Offline
    Joined:
    Jul 10, 2011
    Messages:
    1,296
    image.jpg

    @Twoberth the NRV finally submitted using a tool made to a similar design as yours but more simple and without sacrificing a pump cap.

    1. Cut a slot in the end of a coach bolt to suit the NRV head, onto which you have previously wound 3 nuts.
    2. Adjust 2nuts to fit flush with the end of the bolt and tighten them onto each other so they do not turn.
    3. Grind the bolts round so they are a good fit into the pump tube.
    4. Tighten the third bolt against the head of the bolt.
    5. Place on NRV head in tube and undo! Hopefully!

    The NRV was so tight that the slot still deformed while applying pressure despite having the bolts around it for support!
     
  8. nmp

    nmp United Kingdom Subscriber

    Offline
    Joined:
    Jul 10, 2011
    Messages:
    1,296
    170C0682-52D5-4D8F-8BC1-6013903730D3.jpeg

    4F1EED8F-09F0-4529-8FEB-786ACFCAB58B.jpeg

    Tin after wr hours in electrolysis tank and a scrub up.
    I have yet to wax it up to stop rust.


    Several other problems were overcome! Once the NRV was refitted it leaked a new spring cleaning the mating face no joy suddenly realised the pip had been cut at an angle. Another new pip cured it.
    Leaky jet was fixed with a tweak and away she went.

    30168A1A-89AD-4478-B8DC-17B30D8D9C7D.jpeg

    740F6242-9DAD-4BD5-A5A1-24F7C05B7507.jpeg

    1178074C-60BB-4EE4-B0EB-DC6093FD660A.jpeg

    Last photo shows a selection of tools used and the stove in action!
    110ryears old and brewing again.
     
  9. Twoberth

    Twoberth United Kingdom Subscriber

    Offline
    Joined:
    Feb 21, 2017
    Messages:
    219
    Location:
    England
    @nmp
    Excellent work, Thanks for posting.
     
  10. ROBBO55

    ROBBO55 Subscriber

    Offline
    Joined:
    Oct 27, 2014
    Messages:
    847
    Location:
    Somersby, New South Wales, Australia
    Congratulations @nmp , it's cleaned up nicely. :clap:
     
  11. igh371

    igh371 Subscriber SotM Winner

    Offline
    Joined:
    Jun 23, 2013
    Messages:
    1,168
    @nmp Never used electrolysis myself but that is one stunning result refurbing the tin:thumbup:
     
  12. nmp

    nmp United Kingdom Subscriber

    Offline
    Joined:
    Jul 10, 2011
    Messages:
    1,296
    @igh371
    I use this method a lot on the tins of pocket outfits with great success it cleans them up and with a coat of Briwax they seem to last without rusting again.
    In this case the coat of horrible blue paint has at least protected the surface apart from the lid which is a bit pitted.
    They still retain their character which is a bonus!
    Cheers Nick
     
  13. Radler France

    Offline
    Joined:
    Jan 16, 2013
    Messages:
    338
    @nmp
    There is no need to sacrifice a pump-lid to make a good non-slip NRV-tool. A common chrome-vanadium-steel 5.5mm Allan-key can transfer much more torque than needed, just through the 6mm hole of a pump-lid.
    Making a special key for NRV removal

    Radler
     
  14. Tony Press

    Tony Press Australia Subscriber

    Online
    Joined:
    Jun 8, 2013
    Messages:
    5,491
    Location:
    Stinkpot Bay, Howden, Tasmania, Australia
    Good job, @nmp.

    I like those old Compact Primus Outfit
    tins.

    Cheers

    Tony
     
  15. nmp

    nmp United Kingdom Subscriber

    Offline
    Joined:
    Jul 10, 2011
    Messages:
    1,296
    @Radler excellent thread on your NRV tool.
    I will be looking into making my own.
    Enclosing the head of the NRV seems to be the way stop slippage then backed up by the pump cap keeping it under pressure.
    Removing NRVs is one thing I always dread as they rarely seem to come out easily.
    Removing the pump tube can present problems in itself mainly with getting a neat soldered joint back into the tank!
     
  16. Spiritburner

    Spiritburner Admin Subscriber

    Offline
    Joined:
    Jul 23, 2004
    Messages:
    10,167
    Location:
    N.E. England
    Outstanding result. I have a couple of sizes of electolysis bath - one for big projects & one for very small. Very effective. A stubborn nrv tool is on my do list.
     
  17. shagratork

    shagratork United Kingdom Moderator Subscriber

    Offline
    Joined:
    Aug 9, 2005
    Messages:
    9,661
    Location:
    Durham, N.E. England
    Excellent! :thumbup:
     
  18. Spiritburner

    Spiritburner Admin Subscriber

    Offline
    Joined:
    Jul 23, 2004
    Messages:
    10,167
    Location:
    N.E. England
    Just for me toolbox!
     
  19. nmp

    nmp United Kingdom Subscriber

    Offline
    Joined:
    Jul 10, 2011
    Messages:
    1,296
    @Spiritburner Ha ha not thinking of producing them for sale then hahaha!
    :lol::lol::lol: