Procedure for outer thumb turn (MH cylinder) - Locking cylinder (Z4) 3061

4 batteries are built into the MH cylinder: 2 in the inside thumb-turn, 2 in the outer thumb-turn.

Proceed as follows to replace the two batteries:

  1. Use the battery replacement key to detach the outer thumb-turn. To do so, face the outer thumb-turn and place the battery replacement key on the bayonet mount and turn in a clockwise direction until you can remove the thumb-turn easily.
  2. The outer thumb-turn is now fully detached.
  3. Place the battery replacement key on the detached thumb-turn again and open the bayonet mount completely ( turn in an anti-clockwise direction as you face the mount). You may be able to skip this step.
  4. The lid springs open by itself as the bayonet mount is unscrewed.
  5. Carefully lift off the lid.
  6. The lid is attached to the thumb-turn with a small securing strap and a ribbon cable; the batteries are now exposed.
  7. Insert new batteries in such a way that the two plus poles lie flat on one another and then position in the thumb-turn.

  8. NOTE

    notice

    You should always replace both batteries with new ones when changing the batteries.

  9. NOTE

    notice

    You must place the ribbon cable loop crossways directly under the thumb-turn lid.

  10. Reattach lid to the outer thumb-turn and press gently.
  11. The lid is now flush against the outer thumb-turn.
  12. Use the battery replacement key to lock the bayonet mount to a minimum extent until the lid locks into the outer lid of its own accord. (about 1° in a clockwise direction)
  13. Re-attach outer thumb-turn onto the locking cylinder.
  14. The outer thumb-turn is now flush against the locking cylinder.
  15. Now use the battery replacement key to lock the bayonet mount completely. To do so, face the outer thumb-turn and place the battery replacement key on the bayonet mount and turn in an anti-clockwise direction until the thumb-turn is firmly in position.
  16. Check that the outer thumb-turn is firmly attached again and test the locking cylinder function to ensure that it works.