Installation Guide

Because of the ﬁxed ﬂy design, a certain amount of calculation can be required when decoding or encoding. Master Lock

also offers a software program that will do the calculations for you at:

http://www.masterlock.com/combocalc.msi

This software has been tested on Windows

XP and Vista

and runs correctly. It may be compatible with some earlier

versions of Windows

but has not been tested. To complete the software installation, you must have the free Microsoft

program ‘.net framework’ installed.

The following instructions also are included in a help ﬁle in the software.

Use a 1/16" hex wrench to

remove thumb turn

Remove inside trim and

dismount lock from door

Loosen two screws and remove

bafﬂe plate from dial assembly

Lift cam and remove from

cylinder tailpiece

Loosen the two dial ring/

cylinder mounting screws

Remove dial ring with disrupter

spring

Remove the wave washer and

the dual fence ring

GENTLY lift dial ring from

cylinder

Remove a spacer washer and

disk 3; DO NOT disturb disk 1

Remove a spacer washer and

disk 2; DO NOT disturb disk 1

A groove is cast into the interior of the dial ring. Determine the

number aligned with that groove and record it in the ‘Set to

Disk 1’ column of the worksheet

Deadbolt Information (continued) Grade 2 Residential

Decode

CyliNDeR mOuNtiNg SCRewS