Table of Contents
Advertisement
455 Balanced Regulator Installation
3. Install the sealing O-ring, then thread the
regulator mount nut onto the regulator, finger
tight ONLY.
1.2.1 Bent Tube Assembly and
Regulator 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 inspect-ed 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.
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.
© MMXXI Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 210607001
®
O-ring at the
®
O-ring is in place and
Bent Tube Assembly and Regulator Installation
7. Next, fully engage (clockwise) the large nut
on the bent tube into the regulator inlet nipple
hand tight until resistance is felt. Do not tighten
further. This will ensure the nut is bottomed on
the shoulder of the bent tube.
8. Engage the jam nut fully against the large nut
on the bent tube.
9. Using a 7/8 inch open end wrench hold the large
nut on the regulator end of the bent tube. Use a
torque wrench and torque the jam nut against the
bent tube mount nut to lock it in place. ALWAYS
REFERENCE Appendix Contents, Torque Specs
starting on page APNDX-19 in the modular manual to
confirm correct torque.
Tighten the bent tube to the proper torque value.
10. Use a torque wrench inside the helmet with
a 1 3/8 inch socket or regulator mount tool P/N
525-625 found in the KMDSI tool kit P/N 525-
630 and extension to torque the regulator mount
nut. ALWAYS REFERENCE Appendix Contents,
Torque Specs starting on page APNDX-19 in the
modular manual to confirm correct torque.
21
Advertisement
Table of Contents
