Does the ND78 / ND98 require timing?

To time the ND78/98:

  • Install lock (including outside lever and cylinder) except inside lever.
  • From inside, rotate key cam counter clockwise until it stops.
  • Now rotate key cam clockwise to a vertical (12:00 and 6:00 position) for Conventional cylinders or rotate the key cam clockwise to a horizontal (9:00 and 3:00 position) for IC cores.
  • Install cylinder and lever.
    • For conventional cylinder, rotate key 90° while installing lever and cylinder.
    • For IC core, install the lever, then using a control key, install the core and tailpiece
  • Check operation
    • Outside and inside keys should rotate 180° counter clockwise to lock
    • Outside and inside keys should rotate 180° clockwise to unlock


See also ND series timing guide.

See also ND78/ND98 timing demonstration video.




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