Citizen MXV shutter help needed

I'm working on a Ricoh S-2 with a Citizen MXV shutter. I'm trying to get the shutter plate out of the housing and am stuck. I can see the problem, I just cant figure out how to fix it. In the first picture your looking at the back side of the housing. That shaft at the top with the two pins sticking out in a V shape is the cocking pin. Picture 2 shows the other end of the cocking pin, on the shutter assembly (at 12:00). The problem is that the pins wont pass through the hole in the housing, and I cant figure out how to remove them. They don't budge. I also don't know how to remove the shaft from the shutter assembly. I could use my Dremel and enlarge the hole in the housing but I doubt that's how its supposed to be done... Anyone have any suggestions?

I have to think that post isn't meant to be removed -- were those V-shaped pins screwed into the post? If they're permanent, they act as an anchor. Unless the stuff on the other side comes off, it's there forever. It is possible the shutter was not meant to be serviced to this extent -- planned obscolescence!


I would disassemble as much as possible, soak it good in cleaner, lube and reassemble and see how it goes. You'd be amazed how many folks fix shutters just by taking the glass out, soaking the whole thing in lighter fluid, and letting it dry.

summicron1 said:

I have to think that post isn't meant to be removed -- were those V-shaped pins screwed into the post? If they're permanent, they act as an anchor. Unless the stuff on the other side comes off, it's there forever. It is possible the shutter was not meant to be serviced to this extent -- planned obsolescence!


I would disassemble as much as possible, soak it good in cleaner, lube and reassemble and see how it goes. You'd be amazed how many folks fix shutters just by taking the glass out, soaking the whole thing in lighter fluid, and letting it dry.

Click to expand...

I've tried to unscrew the posts but they don't move at all. They may have screwed in, but that was a long time ago. The shutter either comes out, or its junk. The blades have come loose and need to be put back. The shutter is loose and comes part way out. Not very far, not enough to gain access to the back side, but plenty far enough for the shutter blades to come off their pins I soak cleaned this one four times but the blades still end up oily. It looks like the housing was basically dunked in some kind of graphite lube and I think the soaking was just thinning it enough to run out on the blades. Once I got in this far I was scrapping dried grey lube off the housing, someone really messed this one up.

Many shutter and camera parts are assembled with glycol or similar thread locker that makes the piece immoveable. Soak the pin to shaft joints in Acetone aka standard finger nail polish remover for 5 minutes and try removing them again.