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SuperLite
®
17B
148
© ⅯⅯⅩⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 120613005
8.11 O-Ring Seal Replacement
Tools Required:
Silicone lubricant Dow Corning
®
111 or equivalent.
Clean rag or Q-tips
New O-ring (part# 510-446)
The O-ring on the base of the helmet shell is tough and
lasts at least a year. The O-ring should be replaced at least
once a year, whenever it starts showing signs of wear. It
must be in good condition with no visible nicks, tears or
cracking. The O-ring makes the seal between the helmet
shell and the yoke/neck clamp/neck dam assembly.
To replace the O-ring, lightly lubricate with silicone
lubricant. Clean the O-ring groove in the helmet with a
clean rag or Q-tips™ and inspect the groove for damage,
cracks etc.
Install the new clean lubricated O-ring by stretching it
over the bottom of the helmet shell.
8.12 Head Cushion Foam
Replacement
The head cushion foam should be replaced when the foam
begins to crumble. Order replacement kit, Part #510-523.
A loose head cushion will create a sloppy fit and cause dis-
comfort for the diver and may cause poor oral nasal mask
fit-up increasing the risk of CO2 buildup in the helmet.
1) The head cushion is fastened into the helmet with snap
tabs and pulls out easily.
2) The separate layers of open cell foam sections that fill
the head cushion bag primarily determine the fit of the
helmet. The diver’s head can be moved forward into the
oral nasal mask by increasing the thickness of the foam
at the rear of the head cushion. The diver’s head can be
moved up or down in the helmet by decreasing or increas-
ing the foam pads at the top of the head cushion.
Usually, a diver with a small head will require all the foam
that comes with a new hat. A diver with a larger head will
need to remove some foam in the center top and back of
the head cushion.
The foam may be cut with scissors to loosen the fit, or
more foam can be added to give a tighter fit. Inspect the
cushion bag for broken snaps, tears, or rips, repair/replace
as necessary. On the SuperLite
®
-17 there is a chin strap
to further help adjust the fit of the head cushion. Ensure
the chin strap on the head cushion is in good condition
and is used.
If the chin strap is not fastened properly, the helmet will
float up on the diver’s head. Ensure the cushion bag is
properly reinstalled back into the helmet with the head
cushion bag “snapped back” into the interior helmet shell
using the snap tabs installed.
Note: If the head moves, the helmet should follow.