Antique Mortise Locks
Andy Streenz is a professional locksmith who specializes in antique locks. In his house, he methodically removed and cleaned all existing locks to make them functional. Most problems with antique mortise locks stem from paint buildup, broken springs, and lack of lubrication. Here are Andy’s step-by-step instructions to help you renew and keep your old locksets. 1. Unscrew one of the knob set-screws;
remove knobs and spindle from the door. 2. Remove the wood screws from the mortise lock and pull the lock body out of the door
edge. If there is excess paint, pry through the spindle or keyhole to aid removal. This is a good time to strip any paint from escutcheons. 3. Carefully unscrew the case cover to reveal the mortise lock’s inner components. Important: Snap a photo of the lock to aid reassembly. 4. Remove all paint from parts, reassemble
them, and apply a light spray lubricant. If you have any broken or missing springs, you may need to take the assembly to a local locksmith for fabrication or a salvage warehouse to find a replacement. 5. Reassemble the lock in reverse order. Take care to replace any shims or spindle washers that may have fallen out on removal of the lock.