Daily Maintenance - Kirby Morgan 77 Operation And Maintenance Manual

6.4 Daily Maintenance

The following steps must be performed daily at the
completion of diving operations.
1) Disconnect the helmet from the diving hose
and EGS cylinder. Make sure the air is off and the
breathing system of the helmet is unpressurized. To
vent the system, open the defogger valve knob and
emergency gas valve knob until all gas flow stops.
2) Place a protective cap over both the air inlet and
the emergency valve inlet to prevent foreign matter
from entering the valves.
Cover the air inlet and emergency gas valve
openings with dust caps when not in use.
WARNING
Never disconnect any hose from the helmet
unless all gas has been vented from the
hose first. If the hose is disconnected with
pressure in the line the fittings may be
damaged. In addition, the hose can whip
about causing injury to anyone standing
nearby.
3) Remove the neck dam/neck ring assembly, clean
with sanitizing solution, rinse thoroughly and allow
to dry. Remove the O-ring from the neck dam ring,
clean and lubricate.
4) If the head cushion is wet, remove it from the
helmet. The head cushion is fastened into the helmet
with snap tabs and pulls out easily.
To wash the head cushion, place it in a solution of
mild dish soap. Lightly brush the fabric with a soft
nylon brush to remove perspiration and skin oil, then
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
rinse thoroughly. Squeeze out excess water from the
head cushion and hang to dry in a safe place.
To ensure that the head cushion is dry for future use
you may want to remove the head cushion foam.
However, do not remove the foam unless it is abso-
lutely necessary. The head cushion will dry properly
without removing the foam.
5) If the head cushion is wet, the chin cushion is prob-
ably wet, too. Like the head cushion, the chin cushion
is fastened into the helmet with snaps. Follow the
same cleaning instructions as for the head cushion.
6) Loosen and remove the nose block knurled knob
Removing the head cushion.
Uncover the earphones so they may dry.
Kirby Morgan 77
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