rasras

A common problem as far as I've seen. The door lock will lock, but will not unlock. I've tried the spare key so I assume it's the lock, and hence got the spare part kit. Guess what's coming.... what do I do now. Would really appreciate some pictures as I would rather not take out the lock until I know the process. I don't know the order of the tumblers, although I think I know someone that can tell me that. I'm clueless enought not to know how to put the parts together.

Many thanks for any help you can give. Apologies if I've missed the answer to this somewhere, a bit new to all this.