Model "A" Regulator Hose Assembly; Hose Removal; Inspection, Cleaning, And Lubricating - Kirby Morgan KMB-18 A/B Operation And Maintenance Manual

KMB 18 & 28 MANUAL
9) Place the spring (101), and locknut (102) onto
the stem (96) securing the knob (100).
10) Tighten the locknut (102). The assembly is
now complete and ready for testing.
11) Test the valve by attaching it to an auxiliary
air supply source. There must be no leakage of
gas past the stem (96) or through the packing nut
(99). Turn on the bailout bottle and leave the
supply on for several hours. There must be no
drop in pressure in the system if the valve is
operating properly.
DANGER: A leaking auxiliary valve
assembly can cause the diver to exhaust
his entire auxiliary air supply (bailout)
without his knowledge. This may lead the
diver to mistakenly assume his bailout
supply is available when it is not. This
could lead to panic or drowning in an
auxiliary. Any worn component that
causes an auxiliary valve to leak must be
replaced.
6.8 MODEL "A" REGULATOR HOSE
ASSEMBLY (119A)
The Kirby Morgan Band Mask 18A has a hose
assembly (119a) for gas flow that connects the
side block (94a) to the inlet nipple (61a) of the
demand regulator (63a). The demand regulator
(63a) end of the regulator hose assembly (119a)
has a swivel type fitting that allows removal
without rotating the hose.

6.8.1 Hose Removal

Tools Required:
9/16 inch Open End Attachment on Torque
Wrench
13/16 inch Open End Attachment on Torque
Wrench
11/16 inch Open End Attachment on Torque
Wrench
O-ring Removal Tool
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© Copyright 1970-2003 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 010518001
Fig. 6.40 The "A" side block.
1) Always start removal at the demand regulator
(63a) end of the hose.
2) Once the hose nut is free from the inlet nipple
(61a), the hose and fitting can be pulled out and is
free. Be sure to use a backup wrench when
removing the hose.
3) The side block (94a) end of the hose assembly
(119a) can now be unscrewed, rotating the hose
with the fitting.

6.8.2 Inspection, Cleaning, and Lubricating

1) Inspect the side block end O-ring (116a) and
replace if necessary.
2) The regulator end O-ring (118a) is difficult to
inspect. These O-rings seldom present problems
and must be replaced on a time schedule at least
once each year or whenever suspect due to any
bubble leakage. This regulator end O-ring (118a)
is removed by an O-ring removal tool.