Kirby 77 3.6 Preparing the Helmet for Diving

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. D O 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

specif ication s. S ee Appendi x 1 for a

complete listing of torque speciﬁcations

for each part. Failure to adjust parts to

the recom mended speciﬁca tions could

lead to helmet failure and accidents. This

could be fatal.

WARNING

You can test the one way valve by con necting the bailout bottle to the emergency valve and pressurizing the

sideblock. There must be no gas leakage through the one way valve.