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  1. #11

    Join Date
    Nov 2012
    Shooter
    4x5 Format
    Posts
    6
    I just tried to open the shutter from the backside. But when I did that to remove the blade shutter, I have no way to continue. The pic is as attached. the first three is the front adapt ring, which cause I have no idea to open it from the front. The last is where I can not continue. I have removed the 3 pieces of shutter blade. But I can not continue. Please advise.

    Click image for larger version. 

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Name:	shutter blade from back.jpeg 
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ID:	70596

  2. #12
    shutterfinger's Avatar
    Join Date
    Feb 2013
    Location
    Mid Peninsula, Ca.
    Shooter
    4x5 Format
    Posts
    804
    That appears to be the lens barrel or a spacer barrel. It should be screwed into the shutter. They can become stuck or corroded in place.
    1. Grip the barrel with a strap wrench and try to loosen it. Be careful not to bend or deform the barrel. You may need to remove the shutter from the lens board and grip it with a second strap wrench.
    2. Heat your oven to its lowest setting usually 150°F/65°C for gas or 175°F/79°C for electric. When the oven reaches temperature turn it off and place the shutter in the center of the oven on a rack and let it sit there for 15 to 20 minutes. Remove the shutter from the oven and try to unscrew the barrel from the shutter. Should be standard threads.
    3. Seal the shutter in a plastic bag and freeze it. Once frozen thaw and try to unscrew the barrel.
    4. Last resort apply penetrating oil around the outside of the barrel at the shutter and allow to soak in for 12 to 24 hours.

  3. #13

    Join Date
    Nov 2012
    Shooter
    4x5 Format
    Posts
    6
    unfortunately, I have no oven to heat it. I have tried to freeze it, no work.I will boil it in a sealed Locker-Locker box in hot water. As a result, the method 1&3 doesn't work....So sad ....

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