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Kirby Morgan Dive Systems, Inc.
1430 Jason Way Santa Maria, California 93455
Phone: 805/928-7772
www.KirbyMorgan.com email: kmdsi@KirbyMorgan.com
Also, align the inner curves of all of the rings. This is done by pressing on the neck dam to feel the split rings through the dam and align
them to the inner curve of the stepped (top) ring. Fig 3
5) Apply a very small amount of silicone lubricant to the tip of all screws that will go
through the neck dam material.
6) Double check that the alignment marks as well as the rings are properly positioned.
Insert the Allen head screw P/N 530-024 into positions shown in fig 4 & 5. Using
the 7/ 6 4 " Allen wrench, apply slight pressure to the screw while turning to make it
Fig 5
it is even, turn the screw through the dam and tighten like the other screws. (Fig 7) Repeat this
procedure until all screws are in place and tightened the same.
10) Install the pull strap assembly (see manual) using screws P/N 530-220, plate P/N 540-115
and strap P/N 530-808 as shown, and tighten to 14 in./lb. using the torque screwdriver.
11) Finish tightening the remainder of the screws to 14 in./lb. using the torque screwdriver.
NOTE: Neoprene material will crush under compression and take a set, thus causing the torqued
screws to loosen. If at all possible, allow the neck dam assembled to this point to set for at least
several hours, better 24 hours, and retorque all screws. This will ensure the neck dam has sufficient
squeeze to prevent the rubber from pulling out of position.
Fig 8
Note: All screws on the neck dam assembly should be retorqued to the specified torque on a regular basis. This is important to prevent
failure of the neck seal.
Fax: 805/928-0342
penetrate the material and tighten about 3 turns.
7) At this point the neck dam should be secured
by 4 screws, and all rings and neck dam are held
together.
8) Insert the remainder of the Allen head screws into the
proper holes.
9) Lightly press down midway along the stepped ring and
pull the neck dam through the rings enough to make the ex-
cess material about the same distance out from the rings as
it is around the already screwed through area. (Fig 6) Once
12) Install the chin strap assembly (see manual) and buckle
using 4 screws P/N 530-022 and torque to 24 in/lb.
13) The SL-27 neck dam / ring assembly design has had
the number of neck dam mount screws changed. The older rings used 16 screw placements. The
new ones use 24 screw placements. On the newer rings, the ones with more holes, the 2 outer chin
weight mount screws go through the chin weight, through the stepped ring, then through the neck
dam and into the split ring. These screws need to be torqued accordingly. Install chin weight (see
manual) using 4 screws. Torque to 14 in./lb.
NOTE: The center screws can not be torqued with a torque screwdriver, "hand torquing" these with
a 7/ 6 4 " Allen wrench is sufficient.
14) The excess neoprene must now be trimmed at the inner corner where it emerges through the
rings. Use the sharp razor blade or X-acto knife to start the cut. (Fig 8) Once started, pull out and
away on the neoprene while cutting into the corner. Be certain to get a clean cut on the rubber as
loose pieces may interfere with the O-ring sealing.
15) Inspect O-Ring P/N 510-450 for damage and replace if necessary. Lubricate the O-Ring with
silicone lubricant and reinstall.
© ⅯⅯⅩⅡ Kirby Morgan Dive Systems, Inc. All rights reserved.
®
Document # 100308006
Fig 4
Fig 6
Fig 7
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