Opening Procedure. To open a Sargent & Greenleaf 8400 Series
Combination Lock, proceed as follows:
a) Turn the dial LEFT, stopping when the first number of the
combination is aligned with the OPENING index the fourth time.
b) Turn the dial RIGHT, stopping when the second number is aligned
the third time.
c) Turn the dial LEFT, stopping when the third number is aligned
the second time.
d) Turn the dial RIGHT to O. Hold the dial in this position.
e) Turn the arrow knob (butterfly) in the center of the dial RIGHT
as far as it will go.
Ensure that the dial is held at O when turning
the arrow knob during opening and closing.
Internal spring damage can occur, requiring
lock to be replaced.
The bolt is now
f) Turn the dial to the RIGHT until it stops.
Securing Procedure. To secure the 8400 Series lock, release the
arrow knob by turning it to the LEFT, then turn the dial to the LEFT at least
four complete revolutions.
Combination Changing Procedure. To change a combination setting,
begin by selecting a new three-number sequence based on the rules presented in
paragraph 2.1.3e. Record the new combination in accordance with security
directives and proceed as follows:
a) Open the lock as described in paragraph 188.8.131.52.
b) With the door or container open, throw the door/drawer bolt to
the locked position. If the container has a bolt interlock, it will be
necessary to depress the interlock plunger before the bolt can be thrown while
the unit is open. Use the procedure recommended by the unit's manufacturer.
Throw the locking bolt by using the procedure in paragraph
d) Using the CHANGING index and the old combination, turn the dial
LEFT, stopping when the first number is aligned the fourth time.