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© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130115001
SuperLite
®
27
®
2) Check the nylon seat for wear and/or contamina
-
tion, and replace if necessary. Damage such as a rough
face or cuts to the seat indicate it must be replaced.
3) The Teflon
®
washer and o-ring must be replaced
if worn.
4) Be sure to place a light coating of proper lubricant
on all internal moving parts, o-rings, and washers.
However, do not lubricate the nylon seat, as this will
attract dust and debris.
7.5.3 Reassembly of the Defogger Valve
Tools Required:
3/8 inch Slotted Flat Blade Screwdriver
13/16” Open End Attachment on Torque Wrench
Minimum mandatory replacement parts during
overhaul:
Washer 7, o-ring 8, washer 4, o-ring 6
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
®
washer and new o-ring
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
-
Knob
Side
block
Spring
Seat
Washer
Locknut
Bonnet
Valve
stem
O-ring Washer
O-ring
Proper assembly of the defogger valve.
net into the side block.
6) Tighten the bonnet with a torque wrench to 100
inch lbs.
7) Place the new Teflon
®
washer and the control knob
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
th
of a turn.
8) Install the spring, and locknut. Tighten on the
locknut until it is flush with the knob.
