I was cleaning up the shutter gearing on the second body when I identified a problem with the first curtain.
Wind up the shutter … the second curtain gets released and pulled to the spring roller … then the first curtain gets released and pulled … eh, only part way ???
Hmmm, ok so lets follow those gears … the second curtain roller gear engages a larger gear (6b) on the shutter speed dial post … this larger gear independently follows the gear above it that is driven by the first curtain roller … hmm, this gear is getting stuck. It is sitting on top of one of the sprocket gears (4c) , and the teeth are touching.
Another thing … when I press down the rewind gear I can only partially rotate the sprocket … it appears it is also getting stuck because it is touching the other gear.
Ok, look, turn, look, turn … ah, the speed dial post has a lot of lateral movement … hmmm.
What keeps it in an upper position is a collar on the bottom, this sets the height of the post and gears. It appears that is has been set too high … and the grub screw is very loose … hmm.
then I noticed that part of the black metal body is not level?? This part of the plate keeps the bottom gear (6b) elevated, AAAAHHH, so not to touch the sprocket gear (4c) .
Hmmm, so how did the internals get out of wack ? The only thing I could think of was that the shutter speed dial was impacted. This deformed the body and also pushed the bottom collar upwards … so now the upper gear is sitting too low and touching another gear that it should not.
Ok to raise the post … loosen a couple of grub screws on the collar … raise collar … tighten the grub screws … Ok, now to push the black plate upwards so it is level … hmmm.
Ok, so first thought was to use pliers to pinch the top plate and the black plate … eh, hmm, thought process says this would just deform the top plate before the black bottom plate … ok think.
Some time ago I purchased a lens vise … this is designed to remove dents from the front of lenses … reshape it, but I found during usage that it mostly forces the metal into an oval (better to hammer out the dent with a wooden dowel + hammer) … back to the story … the bottom of camera is much stronger than the top, so the best way is to internally expand the space between the plates. I used the lens vise in between and used it to push the top black plate upwards !!! Winner !!! Now there is no contact between the gears.
Now, I am just trying to figure out how someone would have impacted the shutter speed dial that much to deform the internal body ???
This Old Camera 