I then tried to place a shim but it would not go in as the area was still a bit mucked up.
I then decided to try and pick the lock. The pins were a bit stiff but I managed to move them and was doing well until there was a kind of a snap and the shackle popped open. The problem is that the shackle appears to be stuck. It wiggles a bit but it will not spin it around like it should and it will not go out further nor will it go back into the seat.
Any suggestions as to what I can try to do to fix this problem would be greatly appreciated.
I am thinking that I might be able to carefully unscrew the part that the shackle seats into to see if there is enough space to remove it and then try to disassemble the lock.
Note: I'm fairly new to this but really love these old locks.