turbo123

I'm DIYing my gate lock recently too. For Pic #3, you need to unscrew it and see if Pic #1 comes out also. If not, you need to drill off the 2 rivets on Pic #1. For Pic #2, you need to drill off the rivets. Take care of the rivet holes when drilling if you do not want to make the job complicated. Make sure you don't enlarge the holes when drilling. I think 4mm to 4.5mm drill bit should do the job. After you take out all 2 parts, it becomes very clear how it works and how to replace them. If you do not want to drill or modify another hole for the rivets, bring your existing lock set to the hardware shop and ask for exact replacement. There's many types of locks with different hole locations available outside. The same type of lock will cost around $60 a set. Lastly you need a rivet gun and some rivets to complete the job. Good luck!