How To Fix A Mortise Door Lock

This screw should hold the knob securely to the spindle when you turn the knob.

How to fix a mortise door lock.

You can tighten a simple interior mortise lockset like the one shown at left as follows. If the latch sticks the knob may be screwed on too tight. Pull the knob off the shaft. Lightly sand the patched areas.

Do the same for the recessed patch on the edge of the door. Spray the wd 40 into the lock. Soften the paint. If the thumbturn for the deadbolt is causing the bolt to jam and lock you out when it s in the wrong position you may.

Meet the mortise lock and door knobs. The fix a short term fix is to move the strike plate to align better with the stuck door latch. Don t be afraid to use a liberal amount of oil a sticky lock needs the attention. If you have questions please ask.

Place strips of tape around the exterior and interior patched holes to protect the finish on the door. Most mortise locks are mounted with screws driven through the face plate into the door edge. Then on the faceplate loosen the setscrew opposite the lock cylinder and unscrew the lock cylinder. Loosen the setscrew securing either one of the doorknobs to the square knob shaft.

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. How to fix antique mortise door mechanisms 1. This mortise lock set is installed in a 1930 colonial in the boston area.

Try loosening the flathead screw on the base of your doorknob. The knob and or the spindle may. Make a series of closely spaced cuts into the mortise area. 1 loosen the setscrew on the knob s shank.

By shutting your door you can mark the point on the door frame that latch is coming in contact with. 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. Press down on the button on the rear of the wd 40 canister to begin releasing the lubricant into the lock. Notice the set screw on the base of the knob on the right.

The easiest fixes are. 3 if this does not help remove the knob. Starting at the top of the faceplate outline make a series of closely spaced chisel cuts about 1 8 inch deep inside the marks. Hold down the spray button until the wd 40 begins to overflow from the lock opening.