Yashica 635 Copal MXV Shutter Repair - DIY

[ChristopherCoy]

Well crap! These two things fell out of somewhere when I split the aperture and shutter blades, and I didn’t see where they came from.

 

[Dan Daniel]

Oh oh... it’s on now.

Two things- no need to open up the aperture section. Really, just don't. Life is short, don't do that to yourself.

Second, find a nickel. And a dime. I think a 120 spool will fit into the lens tube from the front. Then put a nickel in the blade opening (or maybe it's a dime, I forget) to fill the little space. this keeps the blades from tilting down into the opening and coming off the pins.

And no matter how bad it gets, it can be done. Slow, patience, and just accept that it will blow up a few times. Be sure to remove the ring that moves the blades and give it and its groove a good cleaning. THAT is the source of most problems. Make certain when you reinstall it to engage a spring or two properly in the front.

(check the X/M sync switch lever for that washer and spring that showed up. I'm not certain, but worth a look.)

 

[ChristopherCoy]

And no matter how bad it gets, it can be done. Slow, patience, and just accept that it will blow up a few times.

Well, patience and knowing when to stop and let the frustration pass has gotten me this far. This is the furthest I've been into it thus far.

The biggest problem right now I think is in the gears on the speed controller. They are super sticky and extremely slow. They actually refuse to move on their own right now. The whole assembly is going into an alcohol bath tonight. I've seen some people use lighter fluid, but it's been suggested earlier in the thread that I do not use that.