I cannot for the life of me figure out how to put the spring back into a Yale lock. This is a stirling Yale look. Other Yale locks I've seen have somewhere where you can place the spring, this one doesn't. I taken a picture of my lock and pasted the link to it below
reverse a yale lock to open out.AV ( CHECK ) this out on youtube, lots of videos thjere on your problem, or just google it, and you find lots of info and PDf on your problem,