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  1. #11

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    I learnt to be careful when holding the lid while applying pressure to the foot pump. There is some danger of injury to the hands...

  2. #12
    L Gebhardt's Avatar
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    The water is the key. When I first got the expert drum and the foot pump I didn't know to fill it with water. It usually startled me as the lid exploded off the tank. So I started opening it by tapping the lid on a 2x4 to gradually push it up. Sometime later I read about the water trick, which has never failed to gently open the tank. However I do it a bit differently than the video in that I fill it right up to the top. You need to open it in a sink this way, but it's much gentler on the tanks.

  3. #13
    Patrick Robert James's Avatar
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    I remarked to a friend once how hard it was to remove the lid, so he gave me a pump. The first time I used the pump I popped myself in the lip with the lid it came flying off so fast. Now I just don't push the lid down tight (3010), I just push enough so it is snug and even. I can easily get it off with my fingertips working around it. I haven't used the pump in a decade and I never have any leaks. I suppose if you use a full Jobo setup you might need to fix the lid more firmly with the cogs and all, but I use a Beseler roller base, so it all works fine for me.

  4. #14
    AgX
    AgX is offline

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    Exactly, this is the Point.

    It is not about lessening the chance of damaging the tank, as the (static) pressure situation would be the same in both cases as I indicated above.
    But the expanding air can give the coming off lid a thrust.
    The less compressed air volume, the less thrust.

  5. #15

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    Yes, water in the tank makes for a simple and safe removal. Fill at least 90% or you will shoot it off like a canon. The major fill makes it come off easily in your hands.

  6. #16

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    Quote Originally Posted by CatLABS View Post
    As far as i know, the only recommendation against over filling is the increased strain on the rotation motor, transfer gears and lift arm - can you please direct to the issue with the damage to the tank?
    I have looked through all my Jobo paperwork but can't find reference to it, I am still sure I read it somewhere, but I may well have been mistaken and maybe just dreamt it, but if so, it feels so real!

  7. #17
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    You should've taken the physics test.
    Joe Freeman

  8. #18
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    Wow, I didn't know it was such a problem for folks!
    I drain the tank, attach the pump and with one hand holding the "cork" in I gently pump one or twice. Easy does it! For at least ten years and a few thousad sheets of film, no problem!
    Michael

    "I only wanted Uncle Vern standing by his new car (a Hudson) on a clear day. I got him and the car. I also got a bit of Aunt Mary's laundry, and Beau Jack, the dog, peeing on a fence, and a row of potted tuberous begonias on the porch and 78 trees and a million pebbles in the driveway and more. It's a generous medium, photography." -- Lee Friedlander

  9. #19
    Sirius Glass's Avatar
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    Quote Originally Posted by msage View Post
    Wow, I didn't know it was such a problem for folks!
    I drain the tank, attach the pump and with one hand holding the "cork" in I gently pump one or twice. Easy does it! For at least ten years and a few thousad sheets of film, no problem!
    Isn't it amazing how successful one can be when they follow the manufacturer's instruction?
    Warning!! Handling a Hasselblad can be harmful to your financial well being!

    Nothing beats a great piece of glass!

    I leave the digital work for the urologists and proctologists.

  10. #20

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    Quote Originally Posted by Sirius Glass View Post
    Isn't it amazing how successful one can be when they follow the manufacturer's instruction?
    +1 !!!
    CatLABS of JP
    Darkroom resources and service

    www.catlabs.info | https://www.facebook.com/CatLABS.of.JP | www.jobo-usa.com

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