Before you attempt to disassemble anything, try a non-invasive procedure first 🙂.
First, the counter isn't tensioned. It's just friction-driven. When the counter gets sticky or hard to turn, chances are it's just dirty.
Inject some lighter fluid under the counter dial. Use a syringe for this purpose.
And when injecting, make sure that the camera is flat on its back, so that effluents drain downwards and not into the camera's other parts. Lay it on an old newspaper to catch whatever flows down.
The counter, if it has indeed a problem caused by fossilised lube, should free up and become easy to turn. But that's not the end of the procedure yet. Get some fine oil, such as sewing machine oil, put this in a syringe and inject in very small amounts under the disc too. Probe for the main shaft and apply the oil there. Try to inject from different points.
This method works 99% of the time freeing up stuck counters.
If this doesn't make the counter disc movement easier, then disassembly is the next step. It may be that the wire spring bearing on the counter is displaced or even missing.
BTW, when setting the counter, it would do the winding mechanism good if the counter disc is turned clockwise.
Jay
