I've been asked to replace one of these due to the customer losing her keys. Can the cylinders (outside, and on inside handle) be replaced, or is it an entire lock replacement ?.
I was going to have a go at impressioning, but she doesn't know where she lost the keys - so best to supply new key combination.
I've changed the cylinders on ERA "security" Rim locks before, swapping the outside cylinder and then re-pinning the handle plug to match. Not sure on the Yale though, as the exterior presentation isn't a standard rim cylinder.
Cheers
Rockford.....