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6.1 GENERAL
This section covers the maintenance and repair of
the Kirby Morgan Band Mask 18A/B and 28.
Correct repairs will result in better communica-
tions, easy breathing, and improved overall diver
performance in getting the job done. Numbers
appearing in parentheses below are "location"
numbers that are used in the blow-apart drawing
at the rear of this manual.
DANGER: Use only Kirby Morgan
Dive Systems, Inc. original replacement
spares when repairing your Band Mask.
The use of other manufacturer's parts will
interfere with the performance character-
istics of your life support equipment and
may jeopardize your safety. Additionally,
any substitutions will void all warranties
offered by KMDSI.
All the spare parts in our catalog were specifically
manufactured for Kirby Morgan designed hel-
mets and masks. When ordering spares, insist on
KMDSI original parts.
DANGER: All parts on the Kirby
Morgan Band Mask 18A/B and 28 must be
adjusted to their proper torque specifica-
tions. See Appendix 1 for a complete
listing of torque specifications for each
part. Failure to adjust parts to the recom-
mended specifications could lead to Band
Mask failure and accidents. This could be
fatal.
6.2 PORT RETAINER (28)
The port retainer (28) is made of chrome plated
brass. Under normal use, the port retainer (28)
should never need replacement.
Document # 010518001 © Copyright 1970-2003 Kirby Morgan Dive Systems, Inc. All rights reserved.
CHAPTER 6
CORRECTIVE MAINTENANCE
KMB 18 & 28 MANUAL
6.3 FACE PORT (27)
6.3.1 General
The face port (27), or viewing lens, is made of a
polycarbonate plastic. Small scratches on the
exterior are not important as they tend to disap-
pear underwater. However, the face port is easily
replaced by removing the port retainer (28) and
dropping in a new face port.
Note that there are two different face ports, one
for the KMB 18 and one for KMB 28. They are
not interchangeable. The face port for the KMB
18 is Part #520-004. The face port for the KMB 28
is Part #520-128.
DANGER: The face ports for the
KMB 18A/B and KMB 28 are not inter-
changeable. Do not attempt to use a face
port from a KMB 28 in a KMB 18A/B.
Although the port will fit into the mask
frame, it will not seal properly. This will
lead to continuous leakage of the mask
and could cause a rapid depletion of the
diver's breathing gas as he attempts to
clear the mask.
Fig. 6.1 The face port from the KMB 28 will not fit properly
in a KMB 18A/B. NOTE THE GAP WHERE THE PORT
DOES NOT PROPERLY FILL THE SPACE.
page 53
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