Bialaddin 315 losing pressure

Discussion in 'Fettling Forum' started by Gareth Shepherd, Oct 30, 2019.

  1. Gareth Shepherd United Kingdom

    Offline
    Joined:
    Oct 6, 2019
    Messages:
    21
    Location:
    Chesterfield
    Hi everyone. I've just fettled a 315, changed a couple of seals, new mantle etc. I fired her up and she kept on losing pressure very quickly. I gave a good 40 pumps and after about 1 min it started to dim. So I gave another 40 on the pump and it brightened up again, then rapidly dimmed down. There were no obvious signs of an air leak anywhere. Has anyone had anything like this before? Your help and advice would be greatly appreciated. Thanks 20191030_150157.jpg
     
  2. Gary Waller

    Offline
    Joined:
    Apr 3, 2018
    Messages:
    67
    Has it got paraffin in...
     
  3. Gareth Shepherd United Kingdom

    Offline
    Joined:
    Oct 6, 2019
    Messages:
    21
    Location:
    Chesterfield
    I can confirm @Gary Waller it does have paraffin.

    I've since found a tiny bit of dirt that was on the filler cap seal. I've cleaned that up and it runs a little better, but it still dims down after 5-10mins.

    Its it worth replacing the seals on the filler cap?

    Thanks
     
  4. Gary Waller

    Offline
    Joined:
    Apr 3, 2018
    Messages:
    67
    Always worth checking...

    I would also check the non return valve, (both washers) I have had them weeping enough to loose pressure but not enough to push the pump out and look obvious.
     
  5. JEFF JOHNSON

    JEFF JOHNSON United Kingdom Subscriber

    Offline
    Joined:
    Nov 28, 2010
    Messages:
    8,645
    Location:
    Shetland Islands UK..
  6. george

    george United States Subscriber

    Offline
    Joined:
    Nov 8, 2011
    Messages:
    1,065
    Location:
    USA
    @Gareth Shepherd Hi, don't forget to check both seals in the cap, especially the bleeder screw that let's you exhaust the air and put out the lantern.:-k
    I had one that was leaking air and it drove me nuts!:rage: I replaced the cap seal but forgot about the bleeder screw seal and sure enough that was the problem.
    :mrgreen:
     
  7. Tive

    Tive Zambia Subscriber

    Offline
    Joined:
    Jan 1, 2011
    Messages:
    310
    When this happen to me, i dip the fount of the running pressurized lantern in a bucket of water and sure enough you will find the leak. i had a 315, and the problem was the bleeder seal.
    Fred.
     
  8. Alby

    Alby Subscriber

    Offline
    Joined:
    Apr 2, 2018
    Messages:
    120
    I had the exact same problems as your 315.. but with a 310 an older but trusty lamp .. loosing pressure ... sure enough I replaced both seals on the filler cap and air screw .. I checked the NRV in the fount and tightened it up a tad.. it did not need much... pumped and listened ..mmmm fired it up ..
    6 hours later I extinguished it ... problem . what problem.. way to go :D/
     
  9. DP2

    DP2 Subscriber

    Offline
    Joined:
    Nov 29, 2016
    Messages:
    198
    Location:
    Liverpool, UK, Europe.
    I would try a dunk test in water and look for air bubbles. The smaller filler caps are a bit prone to cracking if they have been over tightened.
     
  10. Gareth Shepherd United Kingdom

    Offline
    Joined:
    Oct 6, 2019
    Messages:
    21
    Location:
    Chesterfield
    I can confirm that after replacing both washers in the filler cap, she holds pressure and keeps a night light Thanks everyone for your replies 20191101_180746.jpg
     
  11. JEFF JOHNSON

    JEFF JOHNSON United Kingdom Subscriber

    Offline
    Joined:
    Nov 28, 2010
    Messages:
    8,645
    Location:
    Shetland Islands UK..
    That's good news!:thumbup:
     
  12. ROBBO55

    ROBBO55 Subscriber

    Offline
    Joined:
    Oct 21, 2014
    Messages:
    1,451
    Location:
    Somersby, New South Wales, Australia
    Looks good Gareth :thumbup:
     
  13. AussiePete

    AussiePete Australia Subscriber

    Offline
    Joined:
    Nov 21, 2015
    Messages:
    1,367
    Location:
    Toowoomba Australia
    Well done Gareth. She’s running nicely.
    Cheers
    Pete
     

Share This Page