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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.
7.6.4 Installation of the Bent Tube
Assembly
Tools Required:
11/16 inch Open-end Torque Wrench Attachment
7/8 inch Open-end Torque Wrench Attachment
7/8 inch Open-end Wrench
Normal minimum replacement parts during overhaul:
O-ring, Teflon
ring
®
1) Lightly lubricate the bent tube O-ring and install in
the O-ring groove at the regulator end of the bent tube,
then install new Teflon
®
2) Push the regulator end of the bent tube assembly
into the inlet nipple. Slide it in until the side block
end of the tube is aligned with the threads for the
mount nut.
3) Be sure the Teflon
O-ring is in place on the side
®
block end of the bent tube, then engage the threads on
the tube to the side block and hand tighten.
4) Start the "regulator to bent tube" mount nut onto
the inlet nipple of the demand regulator and run it in
by hand as far as it will go.
NOTE: Run the mount nut up on the inlet nipple hand
tight only.
5) Using a torque wrench, tighten the bent tube as-
sembly mount nut onto the side block to (100 inch lbs).
6) Hold the mount nut on the end of the bent tube with
a wrench and tighten the jam nut against it with a
torque wrench to 40 inch pounds.
© ⅯⅯⅩⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 120613005
O-ring at the side block end.
Replace the O-ring on the bent tube if it is worn or damaged.
WARNING
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
supply. This could lead to serious per-
sonal injury or death.
®
SuperLite
17B
75
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