B" Bent Tube Assembly; General; Removal Of The Bent Tube Assembly; Inspection Of Bent Tube Assembly - Kirby Morgan KMB-18 A/B Operation And Maintenance Manual

KMB 18 & 28 MANUAL
6. 9 "B" BENT TUBE ASSEMBLY (119B)
(KMB 18B AND 28)

6.9.1 General

The Kirby Morgan Band Mask 18B and 28 bent
tube assembly (119b) for gas flow that connects
the side block (94b) to the inlet nipple (61b) of the
demand regulator assembly (63b). Both ends of
the bent tube assembly (119b) disconnect for
complete removal.
6.9.2 Removal of the Bent Tube
Assembly (119b)
Tools Required:
11/16 inch Open End Attachment on Torque
Wrench
7/8 inch Open End Attachment on Torque Wrench
7/8 inch Open End Wrench
1) Always start removal at the side block assem-
bly end. The free swiveling mount nut is
unthreaded completely and can slide down the
tube.
Fig. 6.43 Always start removal of the bent tube at the side
block end of the tube.
2) The regulator (63b) end has a jam nut (61c) that
locks the mount nut in place. With one wrench,
hold the bent tube mount nut. With another wrench,
turn down the jam nut (61c), backing it away from
the mount nut. The mount nut can then be rotated
until free of the regulator inlet nipple (61b) threads.
It can be pushed up on the bent tube.
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© Copyright 1970-2003 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 010518001
3) With the two mount nuts free, the bent tube
assembly (119b) can be pulled straight out of the
regulator inlet nipple (61b). The bent tube assem-
bly (119b) can be rotated back and forth to aid
removal. Be careful to only rotate and pull out
straight. DO NOT BEND THE TUBE.
6.9.3 Inspection of Bent Tube
Assembly (119b)
The O-ring (118b) at the regulator end is in-
spected and replaced if necessary. The Teflon O-
ring (116b) at the side block end is inspected and
replaced if necessary.
DANGER: Be sure to use only Kirby
Morgan Genuine Parts when repairing
your Band Mask. The use of other
manufacturer's parts may interfere with
the proper performance of your mask and
jeopardize your safety.
Fig. 6.44 Inspect the Teflon O-ring on the bent tube and
replace if needed.
Fig. 6.45 Replace the O-ring on the bent tube if it is worn.