Insert a flatheaded screwdriver into the spindle housing hole.
How to change door lock cylinder without key.
How to remove a door lock without a key.
Remove this screw using a drill or screwdriver.
When the key is aligned and removed the pin springs push the top and bottom pins down locking the cylinder in place.
Look for a small set screw at the base of the handle.
Unscrew this plate and remove the latch from the door if possible.
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.
Changing an interchangeable lock cylinder 1 remove the flat screw under the latch.
Quick lesson in locksmithing.