Trimming A Latex Neck Seal - Kirby Morgan 77 Operation And Maintenance Manual

8) Install a second set of screws in the two holes im-
mediately adjacent to the tongue on stepped ring.
9) Once the 4 "holding" screws are in place, screw
the rest of the neck dam mount screws in until snug.
Then torque the neck dam mount screws in a stag-
gered pattern, taking up the tension a little bit at a
time, until 10 inch pounds (1.1 Newton Meters) is
reached on each individual screw.
10) Use a sharp razor blade to trim the excess latex
off the outside flap on the neck dam.

8.6.4 Trimming a Latex Neck Seal

Tools Required:
Large, sharp scissors
Anytime you replace the neck dam, it may need
to be adjusted (trimmed) to fit properly. New neck
dams are cone shaped and may be too tight if not
properly fitted to the diver's neck.
1) To trim the neck dam, have your tender hold the
neck dam open so that the two "edges" of the neck
dam are parallel. The neck dam should be under
slight tension but should not be stretched beyond its
normal length.
2) Trim the neck dam with the largest, sharpest scis-
sors available in order to make as few cuts as pos-
sible. There should be no jagged edges on the neck
dam or it may tear. Trim only 1/4 inch (6.0 mm) off
the neck dam at a time, trying it on after each trim.
3) When you are done, the neck dam should be just
snug enough that it does not leak. This may feel a
bit snug above water, but will be very comfortable
under water.
Trim latex neck dams with the largest, sharpest
scissors available.
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
WARNING
Never dive with a neck dam that is too
tight. A neck dam that is too tight could
cause the diver to pass out due to pres-
sure on the carotid artery in the neck.
This could lead to severe personal injury
or death.
Kirby Morgan 77
®
137