I have a Canonet QL17GIII with a sticky slow shutter and a dial that won't reach 500.
My approach to repair is to remove the front lens element to access the shutter.
I have referred to the Rick Oleson's Tech Notes CD disassembly diagram (website
doesn't have it), original Canonet service manual
exploded view and Mike Eckman website.
On Eckman's website I am at Step 5
- removing the rear ring that retains the rear part of the front element.
The ring is stuck on very tightly.
Turning counter-clockwise (and clockwise, just in case), I have tried tried:
(1) using a 7/8 inch crutch tip to remove the ring. No movement at all.
(2) rigging a fine tip pliers to fit into the narrow gap between the filter thread ring and lens ring to grip the approx 1mm notches at the rear of the stuck ring. The pliers are so fine tipped that I bend them.
(3) heating the ring with a soldering iron. I could get the ring surface temp only up to an uneven 40C so not much of a chance of this working.
I would rather not go to the step of drilling into the inner part of retaining ring to create bigger notches, like Eckman has done.
Here is an image from his site that illustrates the ring and his drilling solution.
Any suggestions or experiences appreciated.