Bent Tube Assembly - Kirby Morgan 77 Operation And Maintenance Manual

7.7 Bent Tube Assembly

7.7.1 General
The bent tube assembly provides breathing gas flow
from the side block assembly to the regulator assem-
bly. Both ends of the bent tube assembly disconnect for
complete removal. The o-ring and the Teflon
should be replaced during normal overhauls or any
time these components are deemed unserviceable.
These components do not require replacement during
field repairs providing a careful visual inspection does
not reveal wear or damage. All soft goods should be
carefully cleaned in accordance with KMDSI proce-
dures prior to inspection for reuse.
7.7.2 Removal of the Bent Tube Assembly
Tools Required:
11/16 open end wrench
2 ea. 13/16 wrenches from tool kit
1) Always start removal at the side block end. Loosen
the tube with the 11/16 inch wrench. The free swiv-
eling mount nut on this end of the bent tube can be
Always start removal at the side block end.
unthreaded completely and can slide down the tube.
2) Loosen the lower bent tube nut by using the two
13/16 inch wrenches from the regulator tool kit. Place
one wrench on the bent tube nut and the second on the
nipple tube nut. Only turn the outer nut on the bent
tube to loosen the bent tube.
The mount nut can then be rotated until free of the
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
o-ring
®
regulator nipple tube threads. It can be pushed up
the bent tube.
3) With the two mount nuts free; the bent tube as-
sembly can be pulled straight out of the regulator inlet
nipple. The bent tube assembly can be rotated back
and forth to aid removal.
7.7.3 Inspection of Bent Tube Assembly
Clean the bent tube in accordance with the cleaning
procedures in Chapter 6. The o-ring at the regulator
end should be cleaned and inspected whenever the
bent tube is removed.
Replace the bent tube if it is excessively scratched
dented or compressed deeper than 1/8 inch. If the
helmet has been used for burning jobs, carefully check
for erosion of the metal or severe corrosion. Replace
Replace the o-ring on the bent tube if it is worn or
damaged.
Kirby Morgan
Removing the bent tube.
77
®
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