Reassembly Of Emergency Valve - Kirby Morgan 77 Operation And Maintenance Manual

7.6.3 Reassembly of Emergency Valve

Required Tools: open end wrench
flat blade screwdriver
1) Screw in the new seat assembly until it is even with
the front of the side block body.
2) Next, install the new Teflon
onto the stem.
3) Insert the proper end of the stem into the seat as-
sembly and turn clockwise until the seat lightly bot-
toms out. Leave the stem in place.
4) Lubricate the new o-ring and install on the bonnet.
5) Slide the bonnet over the stem and thread the bon-
net into the side block.
6) Tighten the bonnet with a torque wrench to 100
inch lbs.
7) Place the new Teflon
®
on the stem and rotate the stem counterclockwise until
the seat assembly tops out fully open. The control
knob must turn smoothly without any binding.
Binding (or "hard spots") in the rotation could be an
indication of a bent stem that must be replaced. Re-
place the knob and or stem if the fit allows the valve
to rotate loosely more than 1/8
Bonnet
Knob
Nut
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
washer and new o-ring
®
washer and the control knob
of a turn.
th
Valve
seat
o-ring
Spring
Replace the washer on the valve stem and make
sure the o-ring is in its groove on the stem.
8) Install the spring and locknut. Tighten on the lock-
nut until it is flush with the knob.
9) To test the valve, attach the supply whip from the
EGS first stage to EGS mask valve.
10) Ensure the defogger valve knob is open and the
EGS Valve is shut.
11) Pressurize EGS Valve to a minimum of 135 p.s.i.g.
(9.3 bar) using the EGS cylinder as supply. Allow
system pressure to stabilize , and then shut the EGS
supply cylinder valve. Note time and final stabilized
system pressure.
Adapter for EGS
supply
Valve
stem
Washer
Components of the EGS
valve
Kirby Morgan 77
®
Side block
body
91