Zorki 4k shutter stuck open (and more)

[drhfuhruhurr]

Hello all,

I'm having a few problems with my newly purchased Zorki 4k and I hope maybe someone here can help.

The initial problems: The second shutter curtain does not return when fired and I can not alter the speed dial.

I'd love to get the camera working again. With that in mind, having never CLA'd a camera before, and with a print out of the excellent instructions from this here forum, both I and my father thought it would be fun to have a go.

So far we have removed the top housing, flash sync and slow speed mechanism. Unfortunately it looks like we are not the first people to take this camera apart as there are a couple of missing screws, various greasy fingerprints inside the camera, and, worryingly, the large cog which should be attached to the slow speed mech was not! It's also filthy in there.

We're up to soaking the mech in cleaning fluid and have just removed the second curtain release arm. We're going to continue following the CLA instructions but have a few questions, too:

How do we fix the the shutter so it operates (returns) properly? Is it a case of this happening in due course of the CLA?

And, how on earth do we get the release arm back into position? It drops in to place quite easily in the position it is in the 2nd of the attached pictures, however, it doesn't want to go back where it was (and we cannot manoeuvre it into position as the black piece that the slow speed mech screws on to is in the way). Is it ok to unscrew said black piece, or...?

I hope I've explained things ok, if not, please let me know and I will try to clarify.

Many many thanks for any help,
Cheers,
Tom.