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SuperLite
®
17B
© ⅯⅯⅩⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 120613005
125
8.5 Chin Strap and Yoke Strap
The chin strap should be regularly inspected to ensure
it is in good condition. If it is worn or frayed it must
be replaced.
The importance of a properly functioning chin strap
cannot be overstressed. If the chin strap is missing
or not engaged, the diver’s face will not be properly
positioned in the oral nasal mask. This can lead to a
build-up of carbon dioxide inside the helmet.
The chin strap will also help to maintain the helmet
on the diver’s head in the rare event that the neck
dam/yoke become disengaged from the bottom of the
helmet shell. If this happens, however, the helmet can
still flood if the diver does not maintain an upright
position in the water.
The chin strap must be properly installed
in the helmet and used on every dive.
Without a properly functioning chin strap
installed and correctly used, the diver
may suffer from exposure to carbon di-
oxide. This can lead to unconsciousness,
serious personal injury, and death.
WARNING
The chin strap will help to maintain the
helmet on the diver’s head in the rare
event the yoke/neck clamp separates
from the bottom of the helmet. However,
even if the helmet stays on the diver’s
head, it may flood, which can lead to
drowning, unconsciousness, serious
personal injury, or death.
WARNING
8.5.1 Chin Strap Removal
Tools Required:
Flat blade screwdriver
1) The chin strap is removed by removing the screws
that secure the two snap tabs that penetrate the helmet
shell and attach to the two front weights.
2) Remove the snap tabs and the chin strap. There is
no need to remove the weights if you are only replac-
ing the chin strap.
3) Clean off all traces of the old RTV inside the hel-
met where the snap tabs lay against the helmet shell
and in the holes that the screws thread into to secure
the snap tabs.
8.5.2 Chin Strap Replacement
Tools Required:
Torque screwdriver and flat blade attachment
RTV silicone sealant
1) Thread the screw on the port weight through the
snap tab and the mount hole on the left side of the
chin strap.
2) Fill the hole where the screw threads into the weight
with silicone sealant.
3) Thread the screw in the hole and tighten the screw
to 20 inch pounds.
4) Wipe off any excess silicone sealant.
5) Follow the same procedure for the snap tab on the
right side of the helmet.
ness. They can also cause long term
damage to body tissue. Read and follow
all precautions listed on the silicone seal-
ant tube and Material Safety Data Sheet.
WARNING
Use silicone sealant
in a well ventilated
area. Do not breathe
the fumes from un-
cured silicone seal-
ant. These fumes are
dangerous and can
cause unconscious-