Communications Inspection - Kirby Morgan 77 Operation And Maintenance Manual

Kirby Morgan 77
®
it for wear. If the foam is worn or crumbling it must
be replaced (order Part #510-672).
Inspect the chin cushion. It, too, must be in good
condition. Replace it if the foam is worn or has started
to crumble.

6.5.4 Communications Inspection

Visually inspect the earphones, microphone, wires,
lugs, and communications posts if installed. Test
each component for proper operation. Connect to the
deck amplifier and talk back and forth. Replace any
weak earphone or microphone. Open the earphone
rubber covers and remove the protectors. Allow to
dry thoroughly. Replace defective earphones.
6.5.5 Lubricate Nose Block O-Rings
Tools Required:
Good communications are vital to your safety.
Regul a rly in spect th e co m ponen ts of th e
communications system and replace when necessary.
72
7/16 inch Open End wrench
1) Unscrew the nose block device packing nut and
lubricate the two O-rings and nose block shaft. Re-
tighten the nut just to the point where the nose block
device will still slide, but requires a firm push or pull.
2) Test the shaft to ensure that it will still slide freely at
this time. If it does not, loosen or tighten the packing
nut just enough to permit the shaft to slide properly.
3) Retighten the nose block knob.
The nose block O-rings must be regularly
lubricated.
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003