Face Port, Port Retainer And Nose Block Replacement - Kirby Morgan 77 Operation And Maintenance Manual

Kirby Morgan 77
®
8.5.3 Face Port, Port Retainer and Nose
Block Replacement
WARNING
The o-ring used with the face port of
the Kirby Morgan masks and helmets is
made from a special compound and has
unique dimensions. It is a softer durom-
eter o-ring than is commonly available.
There are no equivalent o-rings manu-
factured by other vendors. This o-ring
must be replaced with a new KMDSI
o-ring. Failure to do so could lead to seal
failure resulting in leaks or flooding.
Clean the o-ring groove prior to replacing the port
o-ring.
Lubricate the port o-ring prior to installing it in
the o-ring groove.
130
The port o-ring must be in good condition and
Be sure to install the o-ring on the back of the port
1) Clean the face port o-ring groove, carefully in-
specting it for any damage.
2) Lightly lubricate the port o-ring with Christo-
Lube lubricant and replace in the helmet shell.
®
3) Place the face port into the helmet shell making
sure the o-ring is in its groove evenly.
4) Slip the o-ring on the small tube that protrudes
from the rear of the port retainer nose block guide.
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
properly installed to seal correctly.
Back side of port retainer
Nose block penetrator o-ring
retainer.