rebuilding locks

[BaritoneUke]

Rebuilding locks on my 1969 tourer inc. new cylinders (currently have 3 different keys), passenger lock had stopped working and I've got to the bottom of that (little protrusion on an internal part that rotates and operated the steel locking piston had broken off). Have got another out of a scrap lock but can't see how to compress the cylinder return spring to be able to get in on the end of the cylinder. Anyone done this job and found a method?
Might have to adapt a pair of pliers I think...

[svenedin]

I can't help with the disassembly because I had this job done by a locksmith. It's so much more convenient to have everything working on one key as it would have been originally.

Stephen

[BaritoneUke]

Thanks for your interest. In the end I found out what I think is the correct method. If you compress the spring, the ends (ears) of it cross each other so can be 'locked up' by putting one behind the other and then using a flat ended screwdriver to unlock it...it then expands nicely into place.
The bit of cotton stops the spring going into orbit when it pings off the end of my circlip pliers Already lost one...

[BaritoneUke]

Offending widget, the niblet on the end broke off, doesn't look very strong, perhaps lock was forced. Robbed one off of another lock to fix things but I think it could be repaired with a hole drilled through and M3 steel bar super glued in there, something like that