Initial Adjustments To Your Helmet; 3�4�1 Head Cushion; Head Cushion Removal - Kirby Morgan 77 Operation And Maintenance Manual

3.4 Initial Adjustments to Your Helmet

Before using the helmet for the first time, it must be
checked and adjusted for proper fit. There are several
adjustments that must be made to provide a more
comfortable fit when wearing the helmet.
3.4.1 Head Cushion
The fit of the head cushion is critical to both comfort
and safety. In general the head cushion should be snug
fitting and help hold the helmet to your head. The head
cushion should also be adjusted so that it assist in the
proper fit of the oral nasal mask to the face.
B WARNING
Never dive with a Kirby Morgan helmet
without a properly functioning oral/na-
sal mask. Without an oral/nasal, dan-
gerous levels of carbon dioxide may
accumulate in the helmet. This can
lead to unconsciousness and death.
The head cushion is part of a helmet cushion system
that includes the head cushion, the head cushion foam
spacer and the chin cushion.

3.4.1.1 Head Cushion Removal

1) Remove head cushion from helmet.
2) Open zipper on head cushion and remove old foam.
You may want to keep the old foam for sizing reference
later. Clean out any old foam particles.
3.4.1.2 Clean and Inspect
1) Clean head cushion bag using mild soap and water.
Rinse thoroughly and hang dry.
2) Inspect head cushion bag to ensure that there are no
rips or tears in the materials and that the sewing and
zipper are still in good working condition. Replace if
needed; order head cushion bag.
3.4.1.3 Stuffing
1) Read "3.4.1.4 Head Cushion Adjustment" on page
29 of these instructions first.
2) Compare to old foam and trim for adjustment.
3) Stuff head cushion.
3.4.1.4 Head Cushion Adjustment
Fit test (follow these instructions if refitting or re-
sizing the head cushion.
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
Note: The head cushion system consists of three
separate components. The head cushion, the head
cushion foam spacer and the chin cushion.
1) Snap the chin cushion in place on the helmet.
2) Start with a new head cushion. Snap the head cush-
ion into the helmet and try the helmet on.
Note: For divers with smaller sized heads, install the
head cushion foam spacer before installing the head
cushion into the helmet.
Note: Make sure the neck pad on the locking collar
is adjusted correctly and also check the fit of the head
cushion with the locking collar in the closed position.
3.4.1.5 Foam Trimming tips
Note: The side foams do not have ear holes. This is
intentional. Ear holes may be cut in if preferred. Trim
Foam for adjustment.
The tips of the "egg shell" side can be trimmed off if
the side foams are too tight.
The chin cushion can also be trimmed for comfort
if needed.
3.4.1.6 Foam Stuffing Tips
There is no one way of stuffing the head cushion. Dif-
ferent combinations of foam can be set up and foam
can be trimmed depending on desired fit.
1) The neck pad block can go on either side of the top
foams, against the neck or against the helmet shell or,
the neck pad block can be removed.
1 or 2 pieces of top foam may be used
Kirby Morgan 77
®
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