Bent Tube Assembly Installation - Kirby Morgan 525-769 Installation Manual

Bent Tube Assembly Installation

1.2.4 Bent Tube Assembly Installation
1. Clean the bent tube in accordance with the
cleaning procedures in ""1.3 General Cleaning
& Inspection Procedures" on page GENPRE-4. 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 (3.18 mm). If the helmet has been used for
burning jobs, carefully check for erosion of the
metal or severe corrosion. Replace if any ero-
sion is present or integrity is in question. Keep in
mind the bent tube is a principle component that
routes breathing gas to the regulator system.
If this maintenance is during an annual
overhaul, replace the Teflon
side block end of the bent tube and the
O-ring at the demand regulator inlet side of
NOTE
the bent tube.
Before beginning the first step, ensure that
the jam nut, located on the inlet nipple, is
turned entirely in towards the regulator
body and away from the bent tube. If it is
NOTE
not, rotate jam nut to this correct starting
position for bent tube installation.
2. Lightly lubricate the O-ring on the bent tube
assembly.
28
O-ring at the
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© MMXXI Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 210607001
455 Balanced Regulator Installation
3. Slide the O-ring end of the bent tube assembly
into the regulator inlet nipple until the side block
end is aligned with the threads for the bent tube
mount nut.
4. Ensure that the Teflon
engage the bent tube nut to the side block fully
until it is hand tight. You may need to gently rock
the regulator body and/or the bent tube to fully
engage the side block nut.
5. Thread the large nut on the bent tube
assembly onto the bent tube adapter two to
three threads.
6. Using a torque wrench, tighten the bent
tube mount nut onto the side block. ALWAYS
REFERENCE Appendix Contents, Torque Specs
starting on page APNDX-19 in the modular manual to
confirm correct torque.
O-ring is in place and
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