Remove this screw using a drill or screwdriver.
How to change door lock cylinder without key.
The top pins and bottom pins line up along the shear line when a key is inserted allowing the lock cylinder to spin freely.
Open the door and look for the latch plate along the door s edge.
The pin springs top pins and bottom pins all make up how the lock works.
Changing an interchangeable lock cylinder 1 remove the flat screw under the latch.
Prop open the door as you change the lock.
Unscrew this plate and remove the latch from the door if possible.
Look for a small set screw at the base of the handle.
Insert a flatheaded screwdriver into the spindle housing hole.
How to remove a door lock without a key.