How can I repair/replace patio door mortise locks?

Step #1: Remove existing lock set:

1. Remove active door panel from frame.
2. Remove all brass cover plates from edge of door panel.
3. Deadbolt door panel (fully extended position). Mortise lock cannot be removed if in unlocked position.
4. Remove handle set.
5. Insert 3/32 allen head wrench into top most hole (first hole in from screw that secures mortise box to door panel) in the face of the mortise lock.
6. Release set screw with two complete counterclockwise turns of allen wrench.
7. Repeat steps 5 & 6 for bottom hole in face of mortise lock (insert allen wrench into bottom most hole on mortise box - next to screw securing mortise box to panel).
8. Reach into hole in top of door panel (use surgical type forceps if possible) and grasp operating rod. Gently remove rod by pulling through hole - push down on bolt to bypass pin and wheels on drive rod.
9. Repeat step 3 for bottom. (Note: push down on bottom bolt to remove drive rod.)
10. Remove (2) screws holding mortise lockset in edge of door. Remove lockset.
    

Step #2: Install New Mortise Lockset

1. Insure proper hand of new lockset and install. Note: If top and bottom auxiliary bolts are removed, re-install at this time making sure the arrow markings on the side of the bolt are oriented to the top of the panel.
2. Re-install brass handle set and activate deadbolt on mortise lock box.
3. Locate and loosen allen head set screws (top and bottom) with 3/32 allen wrench.
4. Install one alignment key into hole directly above protruding bolt in mortise lock.
5. Replace top rod (marked "T" on end with hole), insuring all notches face edge of door panel (insert slowly to avoid damaging plastic liner in auxiliary Module).
6. Pull deadbolt out with fingers and push rod in as far as it will go.
7. Insert second alignment key into slot closest to the top of the door on upper auxiliary module.
8. Slowly pull rod out (approx. 1/16") until key drops into slot.
9. Tighten set screws and remove alignment key.
10. Insert bottom drive rod (marked "B") - depressing bottom bolt with finger, insert bottom operating rod through the bolt until the first roller passes through (you should feel one "bump").
11. Follow steps 6-9 from here.
12. Remove all alignment keys at this time.
13. Check operation of lock (deadbolt, panic release and thumbturn release).
14. Replace face plates and re-install door panel into frame.
15. Lubrication of components with silicone spray is recommended prior to installation.