Communications Post Replacement; Sideblock Assembly; General - Kirby Morgan KMB-18 A/B Operation And Maintenance Manual

6.4.6.2 Communications Post (73)
Replacement
1) Clean off all the old RTV silicone sealant from
the mask frame (17) and communications post
(73).
2) Apply fresh RTV to the communications post(s)
(73).
Fig. 6.20 Apply fresh RTV silicone sealant to the commu-
nications posts prior to installation.
3) Insert the communications posts (73) into the
mask frame (17).
4) Install the washer (72) followed by the nuts
(71). Tighten the nuts to 15 pounds of torque.
5) Wipe off all the excess silicone sealant (RTV)
from the mask frame (17).
Document # 010518001 © Copyright 1970-2003 Kirby Morgan Dive Systems, Inc. All rights reserved.
KMB 18 & 28 MANUAL
6.5 SIDE BLOCK ASSEMBLY (119A/B)

6.5.1 GENERAL

The major difference in the Kirby Morgan Band
Mask 18A and the Kirby Morgan Band Mask 18B
is the side block (94a/b) shape. It is important to
also note that the bent tube (117b) and the "A"
hose (117a) are not interchangeable, nor are the
inlet nipple (61a/b) and jam nut (61c). All the
other components of the side block assembly
(120a/b) are identical and interchangeable be-
tween the "A" and "B" models. The mounting
arrangement is also identical, allowing the "A"
model to become a "B" by changing the side
block (94A/B). The configuration of the side
block on the KMB 28 is identical to the KMB
18B.
The side block assembly (120a/b) is held in place
on the Band Mask frame (17) by a stud (93), flat
washer (18), lock washer (19), nut (20), and a
machine screw (25). On the "28", the flat washer
(18), is replaced by a standoff (24). The screw
(25) does some securing but its main function is
to prevent rotation of the side block (94a/b). The
stud (93) also extends into the interior of the Band
Mask frame (17) far enough to secure the air train
(21) by means of the washer (23) and nut (22).
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