Functions test - Locking cylinder (Z4) 3061

  1. Engage half cylinder using a valid ID medium and turn the thumb-turn in the locking and opening direction with the door open. The thumb-turn must be able to rotate easily when you do so.
  2. Close the door and repeat the process. If the half cylinder should be stiff, you need to align the door or modify the strike plate.

This generally also applies when installing the cylinder in a key switch, for example.