Kirby Morgan 77 - Manual (Page 6)

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© Copyright 1970-2008 Kirby Morgan Dive Systems, Inc. All rights reserved. Document #080626002
Kirby Morgan 77
3.6.3 Check Communications
Check the communications system for proper opera-
tion. Put the helmet on and talk to an assistant on the
amplifier. If you are by yourself, with the helmet off
take the helmet near the amplifier and tap on each
earphone and the microphone, listening to the taps
on the amplifier/speaker. Talk into the amplifier/
speaker feeling the vibration on each earphone and
the microphone with your fingertips. Check the fit
and tightness of the comm module mount nut.
3.6.4 One Way Valve Check
The one way valve must be tested daily, prior to
commencement of diving operations.
1) Prior to attaching (or pressuring up) the umbilical,
close the emergency valve knob, attach and pressure
up the emergency hose. Shut off the defogger control
knob and screw in the adjustment knob on the regula-
tor all the way.
2) With the emergency hose pressurized, turn on the
emergency valve knob. If any gas escapes out the end
of the adapter, the one way valve is faulty and must
be rebuilt or replaced. A one way valve repair kit is
available to rebuild these valves (Part # 525-330).
10) Check the screws on the port retainer . They must
be adjusted to the proper torque setting specifications
noted in Appendix 1 of this manual. Binder head
screws are used in this application for their self lock-
ing characteristics.
3.6 Preparing the Helmet for Diving
3.6.1 Clean Face Port
Thoroughly clean the face port with a soft cloth and
a mild liquid soap solution. DO NOT USE ANY
AEROSOL SPRAYS ON THE POLYCARBONATE
PORT!
3.6.2 Check Moving Parts
Check all moving parts, such as the regulator adjust-
ment knob, the defogger control knob, emergency
(EGS) knob, and the nose block device knob and
all locking collar parts to ensure smooth and proper
operation.
All parts on Kirby Morgan diving helmets
must be adjusted to their proper torque
specifications. See Appendix 1 for a
complete listing of torque specifications
for each part. Failure to adjust parts to
the recommended specifications could
lead to helmet failure and accidents. This
could be fatal.
WARNING
You can test the one way valve by connecting the bailout bottle to the emergency valve and pressurizing the
sideblock. There must be no gas leakage through the one way valve.