I got some new stuff ... (thumbs nose at Dany)

Discussion in 'Collector's Corner' started by dxqcanada, Nov 7, 2017.

  1. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Ah, sounds the shutter blades.
    The one I am working on has a sticky aperture and shutter blades.
    I noticed that sometimes the shutter blades get stuck ... if I put slight pressure on them, it trips ... so this tells me that there is substance on them to make them stick. The easiest way of getting to the shutter blades is by removing the rear lens group ... then wash'n work the blades.
    It is not easy to take this apart to do a real cleaning.


     
  2. Peeb

    Peeb Semi-automatic Mediocrity Generator Supporting Member

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    I had a G-III back when. Difficult to focus but super quiet shutter release and great image quality!
     
  3. smithdan

    smithdan No longer a newbie, moving up!

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    I tried to wash, the shutter out first but from the front. Remember that there was really no access. The whole innards are extremely dirty so taking top and bottom off will be useful. Aperture blades are frozen as well. Thanks for the tip about opening up from the rear. I'll try and not wreck anything and if all doesn't go well I'll ship it off to you for parts.

    IMGP1293s.jpg
     
    Last edited: Nov 11, 2017
  4. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Loosen rear cell with spanner wrench. Turn off the cell by hand.
    Set shutter and release.
    If no shutter movement ... press the blades a bit, and they might release.
    Wash blades with lighter fluid
    Exercise shutter
    Let dry
    Repeat until shutter and aperture are freely moving ... note that aperture only gets set in position after shutter is charged.
     
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  5. smithdan

    smithdan No longer a newbie, moving up!

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    I don't have tools for removing those rings especially with the limited access of the rear ones. Gave everything a good soak with Ronsonol and will carefully try again. Thanks for your help Dennis. Did however get the aperature blades to free up and the shutter to fire reluctantly a couple of times. Think we're on the right track.
     
  6. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Ah, if you ever want to continue working on cameras ... a lens spanner wrench is very important.
     
  7. smithdan

    smithdan No longer a newbie, moving up!

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    Too true! Up to now most of my repair attempts have been on simpler cameras.
     
  8. Mitica100

    Mitica100 Moderator Staff Member Supporting Member

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    What worked for me is pure Naphta from the local hardware store. I take about a half a cup and add three to four drops of Nyoil (google it to see where you can get it), mix well and apply a few drops of this mixture to the frozen shutter. Great for all little fine gears as well.
     
  9. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Hmm, you introduce mineral oil ? I thought shutters need to be dry ?
    tai-lubricants
     
  10. Mitica100

    Mitica100 Moderator Staff Member Supporting Member

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    Actually yes. In repairing some of the large and medium format shutters I was able to use the above formula without having any oily deposits on the shutter leaves. Using Naphta alone will freeze shutters, while adding that Nyoil will ever so slightly lubricate the moving parts. I would not use Nyoil as is, undiluted.
     
  11. dxqcanada

    dxqcanada Been spending a lot of time on here!

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    Hmm ... I have a good candidate to try that on.
    Time to buy some Nyoil.
     
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  12. Mitica100

    Mitica100 Moderator Staff Member Supporting Member

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    Good. Let me know how it worked out. :1247:
     

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