Before you remove the lock mechanism from the door you may want to score the gap around the lock front with a razor to free any paint that may be attached to the metal.
Removing an old door lock.
If the rose doesn t come off with the knob you ll need to remove it separately.
In just three quick steps you can remove an existing cylinder lock for re keying or replacement.
Start by using your phillips head screwdriver to remove any visible screws from the interior side of the door.
Press this wire with your screwdriver to release the interior half of the lock then pull the exterior half off by hand.
Wedge a pin or the tip of your flathead screwdriver under the small opening between the rose and the surface of the door.
Check for small notches or depressions in very old door knobs.
Slip a screwdriver in to release the knob which will expose a length of wire wrapped around the remaining trim.
Removing locks from the exterior side.
Gently pry it off or pull and twist it away from the door.
Shop the home depot for door knobs interior doors and more.
Undo the two mounting screws holding the doorknob in place.