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© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318002
Chapter 8 - Neck Dam
Kirby Morgan
®
37SS
Small gap
Small gap
Place the neck dam on top of the split rings.
3) Place the stepped ring over the neck dam. The
countersunk holes must be on top while the step
must be on the bottom. The tongue on the front of the
stepped ring will stick up above the ring, too.
Place the stepped neck dam ring on top of the neck dam.
4) The alignment marks on the neck dam must be
positioned directly over the joints in the split rings.
The neck dam must also be properly aligned from
side to side with the curvature of both the split rings
and the stepped ring.
5) Once everything is aligned properly, using a small,
sharp punch, push through the neoprene and align the
holes on either side of the groove for the pull strap.
Use a small, sharp punch to locate the bottom hole.
6) Apply a small amount of silicone grease to the
tip of the screws that will secure the neck dam. This
keeps them from binding in the neoprene on instal-
lation.
7) Insert the Allen head screws into the aligned holes
on either side of the pull strap groove and start the
screws. You must apply enough pressure to penetrate
the neoprene. Once the threads engage continue
tightening the screws three turns.
8) Use the punch to align the two screw holes at the
base of the tongue (opposite end) on the stepped
ring and start the screws in these holes. Tighten the
screws three turns.
9) Press down on the stepped ring midway between
the two ends of the ring. Pull the edge of the neck
dam through the gap between the two sets of rings.
The neck dam should protrude an equal distance all
along the length of the ring between the two ends and
it should be fairly taut, no dips.
10) Install a screw at the widest diameter of the
stepped ring on one side and tighten three turns once
you have penetrated the neoprene.
11) Install another screw directly across from the one
installed in Step #10, at the widest diameter of the
stepped ring. Be sure that the neck dam protrudes
from between the rings the same distance all the
way around.
12) Install the remaining screws as previously ex-
plained.
13) Install the pull strap assembly as per this Chapter.
