speed graphic focal plane shutter

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BetterSense

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Has anyone ever worked on them? My shutter currently works on all speeds, but T. Only the first stage of T works, so that the shutter is left stranded with the film exposed; it won't close again after the first stage.

It seems like this could be fixed with just a slight increase in spring tension. My shutter curtains are in good shape, if it's not insanely difficult I would like to clean the mechanism. What's in like working on these shutters and how do you go about it?
 

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hi there

can you switch your spring tension to the faster mode ?
there should be a switch at the bottom of the side with the winding key
that allows you to increase or decrease the resistance on the rollers ..
maybe that will help if you haven't already tried it ...

you might post your question about cleaning your shutter on graflex.org.
bert sanders and other graflex-gurus are there and may be able to help you in
that department ( or maybe someone else asked the same question and you can search it ).

good luck!
john
 
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BetterSense

BetterSense

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Thanks; after reading that google book I think i'll try tackling the shutter myself. The curtains appear to be in fine shape. The shutter works on all settings but T, but I like T, and after 50+ years, I'm sure it deserves a cleaning and relubricating.
 

brian d

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I have managed to get several to start working by just lubricating the rollers
 
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Well I took it apart last night, and more or less, everything is in order. The problem isn't with the shutter itself.

The shutter curtain rolls up on the bottom roller. So you can imagine that for the "T" exposure, which is the last one, the bottom roller is about as big around as it is going to get. The reason T doesn't work is that the bottom roller rubs against the metal camera body right below the bellows. It just barely touches the metal as it rolls around, and a slight nudge with a finger will send it the rest of the way round.

This is curious to me because I don't understand why a problem like this would crop up suddenly. The curtain appears to be fine, the bearings appear to be free and unworn. Perhaps it's winter now and the camera body is shrinking?

In any case, the only way I can see to fix it would be to move the lower roller down, to grind away the metal body, or to lubricate the shutter and/or metal body so that the shutter doesn't stick when it touches. Graphite? Would Armor All hurt the shutter material? I know Armor All is very slippery; I accidentally put it on my motorcycle seat once.
 
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