
Service and Maintenance for Mortise Locks
4–38 W Series Service Manual
5. Tighten the cylinder clamp screw, located inside the mortise case.
6. Insert the control key and core into the cylinder. Rotate the control
key 15 degrees to the left and then remove the key.
7. If the lock is double-keyed, repeat step 1 through step 4 on the
other side of the door.
Figure 4.36 Location of the cylinder clamp screw
(view from the edge of the door)
Cylinder clamp screw
Lock case
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