Canonet Ql-25 problems

[cfsalicath]

First of all, hello! This is my first post on this forum as I have recently aquired a Canon Ql-25 which I hope to put into a useable condition. For that I hope someone who's got experience with the camera can help me.

The camera was not working when i got it. After taking it apart I found two problems, the dreaded stuck shutter and a stuck wind lock.

The first one I fixed by cleaning the shutter- and aperture-blades with Ronsonol lighter fluid. After a few passes the shutter started clicking again. And here comes my first question: When I have cleaned the blades, should they be re-oiled for smooth operation? In which case, what kind of oil do you recommend I use?

Second problem have turned out to be more of a headache, and I hope someone can help me with that. Please have a look at the attached pictures.

The problem lies in the wind lock. A mecanism I belive is designed to prevent the shutter from triggering before the film is wind. When I pull the wind crank, the piece indicated with a blue arrow is supposed to flip to the left, leaving the piece indicated with the red arrow free to pop forward so the neadle above it can be pressed down with the push of the shutter-button. But for some reason, blue picece does not move at all and the red piece blocks the shutter altogether. When I help the blue piece a little bit along the way, everything works fine. I've also made it work by unscrewing the neadle, but that is not a permanent solution.

Anyone have a solution to my problems? Preferably without dismantling the entire release-mechanism... 🙄

Thank you in advance!

 

[John Shriver]

Leaf shutter leaves run DRY. No lubrication at all. The oil on them was a decomposition product of the grease on the focusing helical.

Second problem, could be a missing spring, a spring set up wrong, sticky goo, anything. What you ideally want is a working one to compare with...

 

[02Pilot]

After cleaning stuck steel shutter blades, I've found that they are more consistent with some powered graphite (applied with a Q-tip and very light pressure). The Ronsonol does a good job of cleaning, but seems to leave some residue that can create friction under certain conditions.

I'm not specifically familiar with the model you mention, but a mechanical movement that binds but then moves freely with a little help is often caused by insufficient lubrication or lubricant that has hardened over time.