Primus 981

Discussion in 'Pressure Lamp Discussion Forum' started by Sellig33, Dec 8, 2024.

  1. Sellig33

    Sellig33 France Subscriber

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    Obtained on LBC (Le Bon Coin, an online sales site). Unfortunately the hood is missing :(
    Can someone tell me if it is identical to that of a 1020 or any other Primus lamp?
    Screenshot_20241208-114411_Leboncoin.jpg Screenshot_20241208-114421_Leboncoin.jpg Screenshot_20241208-114434_Leboncoin.jpg Screenshot_20241208-114454_Leboncoin.jpg
     
  2. Andrew T

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    It's not the same as a 991 or 1020. Not sure if anything else is 100% the same.
     
  3. Nils Stephenson

    Nils Stephenson Founder Member

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    That is a very interesting lamp. As you say, it is a 981, but I have never seen this number on a soldered on tag. The lamps with soldered on tags are usually the alcohol versions and the alcohol version of the 981 is the 1381. The green wheel is also new to me. The wheel definitely looks like the correct design for the 981 but the 981 wheel is black. The alcohol versions often have a green wheel, but it is a dark green. The 1381 has the same size wheel as a 991 or 1020 as it does not have the positive shut off valve that the 981 has. All in all a very interesting lamp and I would like to know more about it.

    As for the top hat, it is unique to the 980 and 981 (as well as the 1380 and 1381) and not easy to find. An alternative can be used to make it more presentable, but the correct item is not available (that I know of).

    What year is it from?
     
  4. Sellig33

    Sellig33 France Subscriber

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  5. Andrew T

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    I used a brass bowl on the top . Screenshot_20241209-095623_Samsung Internet.jpg
    Be careful when cleaning the vent, the nickel plating rubs off very easily on the 981.
     
  6. Sellig33

    Sellig33 France Subscriber

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    @Andrew T , good idea !

    The lamp arrived this afternoon. I started disassembling it, but I don't remember how to disassemble the needle control.
    Help please !!!
     
  7. Andrew T

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  8. Sellig33

    Sellig33 France Subscriber

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  9. Nils Stephenson

    Nils Stephenson Founder Member

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    I couldn't have said it better myself. :) Unfortunately I can't get at my 981s at the moment to take some photos.
     
  10. Andrew T

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    Quite a lot to disassemble to get there. 20241215_180804.jpg
     
  11. Sellig33

    Sellig33 France Subscriber

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    Do i have to remove this screw to remove the needle control shaft?
    I don't remember what i do on my 1081 ...
     
  12. Andrew T

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    Yes . This holds a spring against the rack to keep it tight against the pinion.
    Remove the cap bolt and spring and the rack can then be removed easily .
     
  13. Sellig33

    Sellig33 France Subscriber

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    Thank's @Andrew T
    I'll do that Tuesday, i'll be in holidays, for 6 weeks, but 4 weeks of technical unemployment :(
     
  14. Sellig33

    Sellig33 France Subscriber

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    I started cleaning and the outside nickel plating has gone. Only the inside is still here.
    Pictures soon !
     
  15. Sellig33

    Sellig33 France Subscriber

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    Hi all.
    Some news and pictures. I'm sorry to the purists, but I like the contrast between nickel and brass. I'm considering making a brass top, rather than the (unobtainable) enameled original.
    20241226_155236.jpg 20241226_155253.jpg

    Gilles
     
  16. Sellig33

    Sellig33 France Subscriber

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    First run !
    20241228_174514.jpg 20241228_174654.jpg 20241228_182538.jpg 20241228_183543.jpg
     
  17. Andrew T

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    It looks good.
     
  18. Sellig33

    Sellig33 France Subscriber

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    Received yesterday a repro hood from @Assel :D/
    Great thanks !!! [-o<
    Picts tomorrow.
     
  19. Sellig33

    Sellig33 France Subscriber

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    Oops! I forgot the picture ;)

    20250108_123109.jpg
     
  20. Mr cod

    Mr cod Subscriber

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    That hood finishes off nicely,
     
  21. Sellig33

    Sellig33 France Subscriber

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    I've a little pressure leak, try to find it.
    Also i'll try an other mantle, this one is a chinese Peerless 500CP, and too big.
     
  22. MYN

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    Since when did the Chinese started making Peerless mantles??
     
  23. Sellig33

    Sellig33 France Subscriber

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    @MYN ,
    I don't know, it's a name I use because these mantles have the same weave as the Peerless, as well as the color code. I am aware that these are copies or manufacturing rejects. They are easily found and at a good price on Ebay.
    10er Glühstrümpfe Glühstrumpf für Gaslaterne Gaslampen Outdoor Campingkocher . | eBay
    And also on Aliexpress
    Je viens de trouver ça sur AliExpress : 4,00€ | Manteaux de Lanterne à Gaz de Camping en Maille de Gaze, Lumière au Propane en Forme de U, Manteau de Lampe, Couverture de Lanterne de Camping en Plein Air, 20 Pièces https://a.aliexpress.com/_Ewv85A4
     
  24. MYN

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    Ah, I see...
    I usually refer these as genuine generic 'Chinese-mades' rather than copies. With or without brands.:)

    Peerless mantles would come in their distinguished packages with full labelling, brand name and traceable to the manufacturer (Indo Auerlicht in India currently or Philippines for earlier ones).
     
  25. Sellig33

    Sellig33 France Subscriber

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    I think I found the source of my problem. The depressurization screw, I just had the case on my Bialaddin 320. Loss of pressure when everything was normal since I had it. Simply the screw not tightened properly !!!
    I'll look on the Primus tomorrow.
    Good evening to all !

    Gilles
     
  26. Sellig33

    Sellig33 France Subscriber

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    Hi everyone,

    The leak wasn't coming from the pressure relief screw, but from the Rapid's stuffing box.
    I hadn't done the leak test in the bucket of water.....:oops: :-# . I do it yesterday....
    I added a little graphite, and now it's working properly.
    One hour without a single pump stroke.
    17529393788742222938809596552097.jpg
     

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