Begin by removing the screws from the door knob on the interior side of your door.
How to replace an exterior door lock set.
Sectional handlesets have a seperate deadbolt body so the b measurement is actually variable.
If you have more that 5 1 2 inches here you can still use a sectional handleset on your door.
Step 2 remove the old lock.
In some cases door latch plate mortises might need to be cut or enlarged.
The most comprehensive method of ensuring security it involves removing the existing lock from the door including the handle if it s a handle lock combo and then installing.
Part of the series.
Remove the interior knob and thumb turn lock hardware to expose the holes in the door.
Two doorknobs a latch piece which will be fixed onto the door and the strike plate that attaches to the door frame.
On a replacement set with a one piece exterior escutcheon that holds both the lock cylinder and latch the spread must match the holes exactly.
The set should also contain two long screws and four short screws.
See measurement b in the image to the right.
Door window maintenance.
Your new lock set should contain four basic pieces.
This allows you to pull the door.
How to replace an exterior door knob lock.
Replacing an exterior door knob and lock is something you can do on your own with the right tools.
The standard residential door prep for entry doors is two 2 1 8 bore holes 5 1 2 center to center.