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© Copyright 1970-2008 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 080508001
Kirby Morgan 37 & 57
7.6 Bent Tube Assembly
7.6.1 General
The bent tube assembly provides breathing gas flow
from the side block assembly to the regulator assembly
on the Kirby Morgan 37. Both ends of the bent tube
assembly disconnect for complete removal. The O-
ring and the Teflon O-ring 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 Chapter 6 prior
to inspection for reuse.
7.6.2 Removal of the Bent Tube Assembly
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 of the bent tube at the side
block end. The free swiveling mount nut on this end
of the bent tube can be unthreaded completely and
can slide down the tube.
7.6.3 Inspection of Bent Tube Assembly
Clean the bent tube in accordance with 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
if any erosion is present or integrity is in question.
Keep in mind the bent tube is a critical component
that routs breathing gas to the helmet systems.
Loosening the jam nut.
Replace the O-ring on the bent tube if it is worn or
damaged.
Always start removal at the side block end.
Do not wrap the bent tube with tape,
ropework, springs, hose wrap, or other
items. This will prevent daily inspection of
the bent tube. In addition, some of these
items may trap moisture, which could lead
to corrosion and failure of the bent tube.
If the tube fails, this could lead to a rapid
depletion of the diver’s breathing gas sup-
ply. This could lead to serious personal
injury or death.
WARNING
2) The inlet nipple has a jam nut that locks the mount
nut in place. With one wrench, hold the bent tube
mount nut. With another wrench, turn DOWN the
jam nut, backing it away from the mount nut. The
mount nut can then be rotated until free of the regu-
lator inlet nipple 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.