Solution ID
Resolution
To convert the Von Duprin 9975NL(Night Latch or Storeroom) to 9975L (Classroom) exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory):
- Turn the NL screw on 7500 mortise lock all the way in clockwise until screw is no longer visible.
- Will also need to make sure you are using a Classroom Function trim such as a Knob, Thumbpiece or Lever trim.
To convert the Von Duprin 9975L to 9975NL exit function follow these steps (Note: the mortise lock is shipped as Night Latch from the factory):
- Turn the NL screw on 7500 mortise lock counter clockwise until flush with cover plate.
- Will also need to make sure you are using a Night Latch trim.
Notes
Difficulty in converting may be caused by Loctite on the NL drive screw. See solution below:
Using a Von Duprin 7500 lock the set screw is all the way in and my TP trim still works when locked.
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