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PL53 fettling question - pump problem

Discussion in 'Fettling Forum' started by stephen scott, Apr 16, 2018.

  1. stephen scott United Kingdom

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    i wonder if anyone can shed any light on a problem i have with my pl53? in particular the pump.
    when i pump it up a few times it starts pouring fuel out from the pump housing. surely i should'nt be getting fuel in the pump itself as i have replaced the nrv. i'm just scratching my head here. any tips would be helpful and appreciated

    thanks
    steve
     
  2. Tony Press

    Tony Press Australia Subscriber

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    @stephen scott

    It sounds very much like your NRV is not operating correctly.

    Check that the pip hasn’t got any dirt on it; and that the spring is not stuck.

    Look also for cracks in the pump tube.

    If it’s working correctly the Tilley pump should, when out of the tank, make a farting sound when the air is expelled rapidly.

    Cheers

    Tony
     
  3. phaedrus42

    phaedrus42 South Africa Subscriber

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    You could also clean the brass sealing lip of the NRV, gently rotate a wad of fine steel wool on it so that it is bright and smooth.
     
  4. bp4willi Germany

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    Brass tends to have small cracks, which you even don't see with naked eye.
    When you have pressurized the empty fount and remove the pump piston ,
    do the water bucket test and have close look.

    Are bubbles coming out if the nrv centre hole?
    Or the lead seal of the nrv?
    Or from the brass pump cylinder wall?

    Recently I had to unsolder a pump cylinder from a Petromax, to close/ solder 3 (!) small cracks in the brass.
    Then insert it back into the fount.
    Lantern survived.
    Regards
    Willi WP_20180404_002.jpg WP_20180404_003.jpg
     
  5. Mackburner

    Mackburner United Kingdom Founder Member Subscriber

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    A cracked pump tube is a rare fault in a Tilley although I have seen two in the last 20 years or so. Easy to find. Just shove the pump in a glass of water and press down so the pip is solid in the seating and pump and the bubbles or lack of will show all. ::Neil::
     
  6. AussiePete

    AussiePete Australia Subscriber

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    You do the suck test. With the NRV installed, the pump rod and washer removed suck on the pump cylinder and use your tongue as a stopper. If the NRV is working properly a vacuum will be maintained. If it is leaking then you will not be able to suck a vacuum.
     
    Last edited: Apr 17, 2018
  7. Tony Press

    Tony Press Australia Subscriber

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    @AussiePete

    You have to love the taste of kero to do that...

    Cheers,

    Tony
     
  8. AussiePete

    AussiePete Australia Subscriber

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    Too bloody right ..... but I do it testing all my NRVs, Tilley and Coleman. Sure highlights any problem, and the dog won’t kiss me. A strong coffee afterwards is always a great idea ..... :lol:
     
  9. David Shouksmith

    David Shouksmith United Kingdom Founder Member

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    :-k Unfortunately, your partner probably won't, either... :doh:[-X :lol:
     
  10. JonD

    JonD United Kingdom Subscriber

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    almost composed a bad reply here about tank suckers....
    The imagination can run riot
     
  11. AussiePete

    AussiePete Australia Subscriber

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    Hahahahaha....... nothing like a suck to test for leaks ......
    So yeah, I’m a sucker
     

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