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Operating/Changing Instructions
Model 6730, 6735, 6738, 6741 Mechanical Combination Lock
READ THESE INSTRUCTIONS THOROUGHLY
BEFORE OPERATING THE LOCK OR ATTEMPTING
TO CHANGE THE COMBINATIONS
Note: To assure proper operation, all combination safe locks
should be serviced by a qualified safe technician annually;
more often if used in a hostile environment (dust, dirt, high
humidity, etc.).
Figure 1
It is aligned with numbers on the dial only when preparing the
lock for insertion of the changing tool and when entering new
numbers to install a new combination.
DIALING TIPS:
1. When performing any dialing operation, always view the dial
straight-on (Figure 2).
2. If you turn past a number you meant to stop on, you cannot
back up to it. Start the entire dialing procedure again, from
the very beginning. This is especially critical when changing
the lock's combination.
3. In dialing instructions, left is counterclockwise and right is
clockwise.
4. Each time the desired number of the dial
comes into alignment with the index being
used, it is counted as a turn of the dial. For
instance, if the dial is set with 45 aligned to
the opening index and the next number to be
entered is 40, rotating the dial immediately
left (counterclockwise) to 40 is considered
one time left to 40.
Figure 2
© Copyright 2006, Sargent & Greenleaf, Inc.
The dial ring for your lock has
two index marks (Figure 1).
The one located at the twelve
o'clock position is the opening
index. Numbers on the dial are
aligned with this index to open
the lock.
The mark at the eleven o'clock
position is the changing index.
5. Never force the dial. A dial which cannot be turned with
light-to-moderate hand pressure indicates the lock is open
or that the mechanism needs to be serviced by a qualified
safe technician.
TO OPEN:
Your lock may be set on a factory shipping combination, or it
may be set on a true, three-number combination. To open a
lock set on a factory shipping combination, turn the dial left
until 50 aligns with the opening index the fourth time. Now
turn the dial right. It should stop at about 95, indicating the
lock bolt has been retracted.
In some cases, even though your lock was factory set at 50, it
will open when dialed left at least four times to 41 then turned
right until the dial stops at about 86 or 87. This is because
your lock is paired with a dial that has its spindle spline
keyway set to 41 rather than what has historically been the
standard spline orientation of 50 for the spindle spline. If your
factory set lock does not open on 50, it will undoubtedly open
on 41.
If your lock is set on a true, three-number combination, follow
these steps to open:
1. Turn the dial left until the first number of the combination
( ) aligns with the opening index the fourth time.
2. Turn the dial right until the second number of the combination
( ) aligns with the opening index the third time.
3. Turn the dial left until the third number of the combination
( ) aligns with the opening index the second time.
4. Turn the dial right until it stops, at approximately 95. If the dial
does not stop, carefully repeat the entire opening procedure.
Remember to dial exactly to the number of the combination
with which you are working. Dialing even a small amount past
a number you meant to stop on will cause the lock to remain
locked. This is part of the mechanism's security.
5. To re-lock the combination lock, turn the dial four complete
revolutions to any non-combination number.
2
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