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© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318002
Chapter 7 - Defogger Valve
Kirby Morgan
®
37SS
bent tube adapter
The bare sideblock is shown here. It is machined from a
single block of stainless steel. Note that the bent tube adapter
can be replaced if damaged, but this requires a special tool.
Check with your authorized repair center for tool availability.
7.5.2 Cleaning and Lubricating
1) Clean all the metal first in the soapy water solution
and then in a
50/50
dilute solution of white vinegar/
water. Rinse in fresh water.
2) Check the Teflon
®
seat for wear and/or contami
-
nation, and replace if necessary. Damage such as
a rough face or cuts to the seat indicate it must be
replaced. It is also a good indicator of possible line
containments.
3) The Teflon
®
washer and o-ring must be replaced
if worn.
4) Be sure to place a light coating of lubricant on all
internal moving parts, o-rings, and washers. How
-
ever, do not lubricate the Teflon
®
seat, as this will
attract dust and debris.
Be sure to lubricate all parts, with the exception of the valve
seat, prior to reassembly.
7.5.3 Reassembly of the Defogger Valve
Tools Required:
3/8
inch Slotted Flat Blade Screwdriver
13/16
inch Open End Attachment on Torque Wrench
Minimum mandatory replacement parts during
overhaul:
Washers, O-rings
1) Install the new Teflon
®
washer and new o-ring
onto the stem.
Install the washer on the defogger valve stem.
2) Screw in the new seat assembly using the stem turn
clockwise until the seat lightly bottoms out. Leave
the stem in place.
