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“ cannot lock and pull key ”

Resolution: Tips for changing the function: The NL Drive screw will not be visible when lock body is set to Classroom function There is locktite on the screw that makes it seem like its turned down enou...:

Will a key from pull side retract the Chexit device latchbolt when armed?

Resolution: CX98/9975 mortise devices will retract the latch bolt when the key is used on the pull side of the door.:

Is the Falcon T381 a true classroom security function?

Resolution: T381 Classroom Security Lock is not a "true" classroom security / Intruder lock function. The T381 is classified as a ANSI/BHMA F88 function: Defined as Grade 1, Apartment, Exit or Public Toil...:

How do I change the function of the Von Duprin 7500 mortise lock from Lever ( classroom ) to NL ( night latch )?

Resolution: 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 clo...:

Why does my key cylinder spin and not lock or unlock the ND?

Resolution: This could also happen if the tailpiece isn't installed in a KIL, FSIC, or SFIC cylinder. The FSIC driver also could have come loose from the core in the spindle. :

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“ cannot lock and pull key ”

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