Tilley BR49 fettling

Discussion in 'Fettling Forum' started by Michel, Feb 16, 2020.

  1. Michel

    Michel Subscriber

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    Hi all
    this my next fettling project
    I am surprised : absolutely no stamping on the fount
    no Tilley, no letter, no number !!??

    The preheating system make me some troubles :
    the fuel don't climb in the preheating cup.
    The perheating system is dismantled
    Where could I find an exploded of this part in order to understand
    the way the fuel is directed towards the cup ?

    IMG_8492.JPG
     
  2. BigStevie

    BigStevie United Kingdom Subscriber

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  3. Tony Press

    Tony Press Australia Subscriber

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    Michel

    That lantern tank would be approximately 1949/1950 to 1954/5. It would be unstamped but may have had a Tilley transfer (decal).

    Tony

    @Michel
     
  4. JEFF JOHNSON

    JEFF JOHNSON United Kingdom Subscriber

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  5. Michel

    Michel Subscriber

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    OK I found the patent
    Espacenet - Bibliographic data
    And I saw the very small hole in the bottom of the part
    now the problem is to unblock the conduit

    thank you all for the informations
     
    Last edited: Feb 17, 2020
  6. Michel

    Michel Subscriber

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    I had to change all the seals and after a good clean, here it is.
    I was afraid the kerosene gives me a yellow and smoky flame but not at all
    the preheater is very effective, I obtains a beautifull blue flame

    IMG_9018.JPG IMG_9021.JPG
     
  7. JEFF JOHNSON

    JEFF JOHNSON United Kingdom Subscriber

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    That's good news!:thumbup:
     
  8. AussiePete

    AussiePete Australia Subscriber

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    It’s ready to rock and roll with a mantle. These preheaters do the job very well.
    Well done on clearing the blockage and getting it to operate.
    Cheers
    Pete
     
  9. Michel

    Michel Subscriber

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    Hi all
    the old lady in in order.

    IMG_9035.JPG IMG_9037.JPG

    But I have a problem : the lamp ran for 2 hours.
    Over time, the light went down and down and now the burner is deep red. I'm not an expert on the Tilleys, but I don't think that's normal.
    I had noted a halo around the mantle. I think this generator is a bit enlarged
    what explanation would you have?

    IMG_9047.JPG IMG_9048.JPG
     
  10. JEFF JOHNSON

    JEFF JOHNSON United Kingdom Subscriber

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    The most likely cause of that problem is that the jet in the vapouriser has become enlarged, but if there is a strong smell of paraffin, then part of the burner may have loosened.
     
  11. podbros

    podbros United Kingdom Subscriber

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    Great pics and well done on all your hard work!:thumbup:

    Sounds like it's burning on the inside? Did you strip the burner down at all? They can wear and it's not always apparent where the problem is, hence the availability of repair kits with spare tubes etc.. sometimes the main burner body threads become so worn that it's hard for everything to seal properly?:-k

    The good news is there are lots of 2nd hand or even nos parts still available!

    Good luck with everything,

    Best wishes,
    pb
     
  12. Michel

    Michel Subscriber

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    yes guys, it seems it's burning in the inside even thought the burner have been dismantled and cleaned
    I did'nt notice a great smell of paraffine
    As I own another burner, I shall try tomorrow :-k

    I shall also be in need of a better hood :lol:

    IMG_9050.JPG
     
    Last edited: Feb 24, 2020
  13. george

    george United States Subscriber

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    Do you think the lantern could be leaking air somewhere? An overlooked stress crack?
     
  14. Tony Press

    Tony Press Australia Subscriber

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    It’s best not to disassemble an old Tilley burner.

    With heavy use the threads tend to erode, so I always clean the burner and make sure it’s got no wasp or spider debris in it.

    If the burner is taken apart, I always put it back together with high temperature nickel grease.

    I have a few used burners in good condition where the previous owner has re-assembled them using muffler paste for the mixing tube thread.

    Another possibility for underburn inside the mixing tube is that the burner has been re-assembled with a long injector tube inside a short(er) mixing tube.

    Cheers

    Tony
     
  15. Michel

    Michel Subscriber

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    it seems that you are right, guys,
    it is not a good idea to dismantle these old burners
    I changed the burner and the vaporizer, It is not new but healthy.
    the lamp has trouble rising to its proper operating temperature. I had a halo around the mantle for a long time, but it is stable now
    even though not very bright
     
  16. george

    george United States Subscriber

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    Correct, DO NOT DISASSEMBLE THE BURNER!! They are a bitch to put back together - if you can even get them back together! Threads are usually shot to hell and burned.
    :rage:
     
  17. Michel

    Michel Subscriber

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    We learn something every day, even at my age:D/
     
  18. Michel

    Michel Subscriber

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    Hi all
    another question :doh:
    the patent for the preheating system on those BR49 have been claimed in 1930/31
    The first BR tilley lamps are dated 1949
    I wonder why the patent have not been in use before ?
     
  19. Mackburner

    Mackburner United Kingdom Founder Member Subscriber

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    It was used well before the BR lanterns. That pre heater is shown on model PL55 in a 1935 catalogue but it was in general use by the Rail companies on a range of lamps throughout the 1930s and 1940s. BR as British Rail didn't exist before 1948 when the rail companies were nationalised. That pre heater was probably designed for Great Western Rail but would have been used by all 4 rail companies in the 1930s. ::Neil::

    ::Neil::
     
  20. Michel

    Michel Subscriber

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    I suspected a little ;)
    thank you for the informations Neil
     

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