Side Valve Malfunction - Kirby Morgan 77 Operation And Maintenance Manual

Kirby Morgan 77
®

4.4 Side Valve Malfunction

Symptoms
Defogger can't be shut off. Helmet
free flows through defogger.
Defogger valve will not flow gas.
Defogger valve knob hard to turn.
4.5 Water Leakage Into Helmet
Symptoms
Water leakage into helmet.
56
Probable Cause
Seat assembly damaged or debris
under seat.
Sideblock damaged by debris
No air in umbilical.
Foreign matter in side block or one
way valve.
Valve stem bent.
Probable Cause
Exhaust valve damaged or stuck
open.
Communications module O-ring
extruded or damaged.
Communications module not prop-
erly tightened.
Comm module Damaged.
Binding posts or connector seal
damaged.
Diaphragm damaged or not seated
properly.
O-ring in neck dam ring damaged
or missing.
Port retainer screws loose.
Neck dam torn or damaged.
Hair caught between o-ring and
base of helmet.
Head cushion or chin strap caught
under o-ring at neck dam.
Regulator assembled improperly.
Damaged or loose reg pod.
Damaged gasket
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
Remedy
Clean and/or replace seat
assembly.
Replace sideblock.
Turn air on to diver's supply topside.
Disassemble side block one way
valve and clean.
Replace valve stem.
Remedy
Seat or replace valve.
Replace o-ring.
Tighten module mount nut.
Replace.
Remove posts, clean and reseal
with RTV sealant.
Seat or replace diaphragm.
Replace o-ring.
Tighten screws.
Replace neck dam.
Remove hair from this space.
Clear cushion or dam
Check for proper assembly.
Tighten/ repair pod
Replace gasket