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Silversurfer
Tinkerer
Username: Silversurfer
Post Number: 21
Registered: 08-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 23, 2010 - 02:05 pm: | 
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Hi Folks, I have recently bought from flebay an Agfa Karat,Solinar F3.5 with compur rapid shutter.
The problem is the focus adjusment is stuck solid at 10 ft. I read somewhere that the green Agfa grease can become like glue and carefully applying a hair drier to warm the camera/lens area might get it to move, I even tried a drop of Naptha (after the hair drier was safely off/out of range!) No luck, all that happened was the front of the lens suddenly unscrewed slightly, until it hit the stop pin.
The whole lens/shutter assembly seems to rotate v v slightly back and to (as if the mounting screws are slack?)
But how to dissmantle the whole shutter/lens/focus unit off the camera? any tips gratefully welcome. Silversurfer |
Scott
Tinkerer
Username: Scott
Post Number: 119
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 23, 2010 - 04:48 pm: |
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First, while it is possible to make the focus operable without disassembly, it won't be a very satisfying solution. You can try slowly dripping naptha into the helical threads from the inside, and working the focus. Might help a little, but it will never be smooth.
I had a couple of Karats apart last year. Open the film door, and unscrew the threaded collar. The whole shutter will then come off, and you can proceed to separate the inner and outer helical threaded collars, clean out the old grease, and replace with new grease. |
Rick_oleson
Tinkerer
Username: Rick_oleson
Post Number: 1117
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, November 23, 2010 - 09:02 pm: |
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Once you get the shutter off, Xylene is more aggressive and will probably work faster than Naphtha on that hardened grease. It's harder on paint and plastics, though. |
Silversurfer
Tinkerer
Username: Silversurfer
Post Number: 22
Registered: 08-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, November 24, 2010 - 04:19 pm: |
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Thanks guys, with your advice I have removed the whole lens/shutter assembly. But didn't feel confident to dismantle any further, (looked like three tiny screws in back of shutter body) So I persevered with alternate hot air/lighter fluid. after half a dozen goes it started to free up fine. So I removed the inner lens, put the shutter on B and carefull picked the green crud from around the back of the helical. I would have been nice to have stripped the helix, but shutters are not my level of skill at moment! Everything went back ok and the shutter is firing nicely. By the way what is Xylene? is it avail. in UK? |
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