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Kirby Morgan 37 & 57
© Copyright 1970-2008 Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 080508001
Knob
Spring
Washer
Locknut
Bonnet
Valve stem
O-ring
Washer
Side block
Stud
Bent tube
Seat
Plug
O-ring
O-ring
O-ring
O-ring
Air Train
Air Train
Gasket
5) The side block assembly is now unfastened, but
held in place by the rubber sealing compound (silicone
sealant) that acts as a glue. It may be necessary to
rock just slightly, or pry the side block from the hel-
met shell. A thin putty knife can be pushed between
the side block and the helmet shell to help free it.
Do not use a screwdriver or chisel as damage to
the shell could result. Be sure to peel or scrape the
old silicone sealant away from both sealing surfaces
before reassembling. Acetone helps remove this, but
must be used sparingly since it will also remove the
Components of the Side Block & Air Train
flat black finish inside the helmet.
6) If you plan to rebuild the side block assembly, it
should be done at this time, while the side block is off
the helmet. Overhaul the defogger valve and emer-
gency valve in accordance with this chapter. Overhaul
the one-way valve in accordance with this chapter.
7.3.4 Side Block Assembly Replacement
If a new side block is being installed, make sure it
aligns correctly in the holes of the helmet shell before
applying RTV silicone sealant.
1) A generous application of silicone sealant must be
applied to the side block prior to installation on the
helmet shell. The sealant should surround the stud,
alignment screw, and air inlet on the block. Use only
Dow Corning
™ RTV 732 Multi Purpose sealant. This
work must be done a well-ventilated area.
Care must be taken to avoid sealant entering the
air opening in the side block. Be sure to remove all
excess silicone sealant before it sets up. Lacquer
thinner can be used to dissolve uncured sealant, after
tightening.
2) Fit the side block to the helmet shell.
2) Thread the screw through the helmet shell and
lightly tighten into the side block body.
A thin putty knife helps to remove the side block.