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15
The next step is physical relocation of disk 1 so that the number
38 is aligned with the groove cast into the dial ring. Next the flys
must be moved on disks 2 and 3.
That can be accomplished by firmly gripping the fly and pulling it
from the disk while rocking it forward and back. The fly is pressed
into place and should not be hard to relocate. Place it in the newly
determined location and then press into place.
Use the reassembly directions given earlier to reassemble the lock
and remount on the door. Operate the new combination with the
door open to throw and retract the bolt.
Rekeying
Rekeying the key operated cylinder may be accomplished using a standard pinning kit and the BumpStop
®
procedures
related on pages 2, 4 and 33. Rekeying the cylinder only requires removal of the baffle plate and cam to access the
screw-on retainer cap for the plug. Remove the cap, cap pin and spring, then use a follower to remove the plug.
Rekey as desired and then reassemble. Always check the bible of the cylinder to ensure that there aren’t master pins being
left in the cylinder when rekeying and to reposition the BumpStop
®
pin if your new combination doesn’t have a compatible
bitting in the same chamber as the last combination.
The Master Lock software program available for locksmiths will do the encoding and decoding calculations for you. It is not
recommended for the do-it-yourself end user but can be a valuable tool for the locksmith. For some computers, you may
need to get a free upgrade from Microsoft called ‘.net framework’ to be able to install the software. Enter the link below on
your browser to access the program for installation.
http://www.masterlock.com/combocalc.msi
ENCODING
Disk Set to Formula Combination
The disk that contacts the dial
1
38
Align with Dial Index
38
3
The middle disk
2
36
Second number minus 1.
Then subtract third number
if less than zero, add 50 until
between 0 and 49.
25
2
The disk that comes out first
3
38
Add set positions for disks
1 and 2 plus 6. Subtract
that from combination 1. If
less than zero, add 50 until
between zero and 49.
18
1
The disk 3 calculations require adding the set positions for disk 1 and 2 plus 6, e.g. 38 + 36 + 6 = 80. That answer must be
subtracted from combination number 1: 18 – 80 = -62. Because the answer is not between 0 and 49, you must add 50 until
it is: -62 + 50 = -12; -12 + 50 = 38. Write the answer in the worksheet.
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