Mamiya 180mm leaf shutter won't cock

Discussion in 'Camera Building, Repairs & Modification' started by st3ve, Oct 24, 2010.

  1. st3ve

    st3ve Member

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    In regular use, my Mamiya 180mm Super shutter seems to have broken. When I try to cock the shutter (lens pictured here: http://arukucamera.net/selling/C330_180mm01s.jpg ) there is absolutely no pressure, cocking sound, anything on the X-flash sync setting. Interestingly, on the M-sync, which happens to be the one closer to the cocking lever, there is a tiny sound, like a short bit of the cocking sound, but still little to no resistance in the mechanism. I can't trip the lever to fire the shutter, it acts as though the shutter is not cocked.

    When I change speeds on the lens, at arbitrary numbers (like 1/4s, 1s, and 1/50th) it makes the "Oh ****...." sound of changing speeds while the shutter's cocked, but I definitely didn't manage to cock it with the cocking lever. I probably managed to knock the speeds out of whack, if not ruin it, just by that, but that's what it does.

    I've done everything I can to try and break into the screws holding the back plate on, which seems to be the only way to even possibly get into the shutter. Is there anything I can do externally to try and fix this thing, or should I send it off, or should I trash it?
     
    Last edited by a moderator: Oct 24, 2010
  2. benjiboy

    benjiboy Subscriber

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    I have one of these lenses, and if it became faulty I would take it to a professional and have it repaired.
     
  3. Andrew K

    Andrew K Subscriber

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    Don't stress - just send it off for repair.....if the shutter is not opening, then you've probably got a broken mainspring....

    Don't even try to pull the lens apart if you've never done one before - they are not that easy....


    BTW - to ge tto the shutter you go in from the front of the lens first - remove the front end, then remove the back element and unscrew the shutter..well - sort off....
     
  4. Grif

    Grif Member

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    Wandered around your web site. Long story short,,, don't wreck the lens. Unless it's covered in fungus or something else really wrong, just send it in and bite the bullet.

    Did you find another C33?

    I still miss the C33 I had in the late 60's.