How To Fix A Mortise Door Lock

By shutting your door you can mark the point on the door frame that latch is coming in contact with.

How to fix a mortise door lock.

The fix a short term fix is to move the strike plate to align better with the stuck door latch. The easiest fixes are. Soften the paint. The knob and or the spindle may.

Do the same for the recessed patch on the edge of the door. Starting at the top of the faceplate outline make a series of closely spaced chisel cuts about 1 8 inch deep inside the marks. Notice the set screw on the base of the knob on the right. Pull the knob off the shaft.

Hold down the spray button until the wd 40 begins to overflow from the lock opening. Today we are discussing how to remove an entry mortise lock with a thumb latch on the exterior instead of a regular knob. You can tighten a simple interior mortise lockset like the one shown at left as follows. Loosen the setscrew securing either one of the doorknobs to the square knob shaft.

Most mortise locks are mounted with screws driven through the face plate into the door edge. Cut through the base of the cuts to empty the mortise of excess wood. This mortise lock set is installed in a 1930 colonial in the boston area. Spray the wd 40 into the lock.

How to fix antique mortise door mechanisms 1. This screw should hold the knob securely to the spindle when you turn the knob. Examine the mortise lock. To remove a mortise lock set cylinder for repair see illustration for how to tighten a loose doorknob remove the deadbolt knob by loosening the setscrew in the sleeve of the knob using a standard screwdriver or allen hex wrench or by removing any mounting screws.

Try loosening the flathead screw on the base of your doorknob. Place strips of tape around the exterior and interior patched holes to protect the finish on the door. Make a series of closely spaced cuts into the mortise area. 1 loosen the setscrew on the knob s shank.

3 if this does not help remove the knob. Don t be afraid to use a liberal amount of oil a sticky lock needs the attention. 2 hold the knob on the other side of the door and turn the loose knob clockwise until it fits snugly. From there you can either widen the hole both of the wood and metal or you can unscrew the strike and re secure it in the proper position.

If you have questions please ask. If the latch sticks the knob may be screwed on too tight. Meet the mortise lock and door knobs. Press down on the button on the rear of the wd 40 canister to begin releasing the lubricant into the lock.