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Cola power

lowep

Member
i was just about to write (another) desperate "what to do" post to plea for advice about how to remove a lens with a copal o shutter stuck to a lens board that I had not touched for about a decade, after throwing almost a full can of wd-40 at the problem, as well as a few days wondering how to solve this problem without destroying (1) the lens (2) the lens board (3) my self respect... when out of the blue I remembered standing under a tree watching a bush mechanic remove a rusted pipe from an even rustier car engine with (of course) Coca Cola!

Why not give it a try?

Well to cut a long story short less than 30 seconds after I tipped a spoonful of that black liquid gunk from my refrigerator on to that lens board, the ring around the lens that had refused to budge no matter what I tried to do suddenly started rotating like a perfectly oiled wheel and within seconds it was off.

problem solved!
 

KC_2020

Member
WD-40 is hygroscopic so you do want to follow up by cleaning your lens, lens board and the retaining ring. If you don't you'll have the lubricant from the WD-40 and the moisture it attracted corroding your shutter.
 

lowep

Member
thanks for this useful tip - would tepid water with a few drops of dishwashing liquid in it be ok for doing that?
 

KC_2020

Member
Yes you could just wipe the lens board and retainer ring with a damp cloth and then dry it. If you can feel anything slippery, residual from the WD-40 anywhere on the lens or shutter, isopropyl alcohol will remove it.
 
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