Cleaning And Lubricating - Kirby Morgan 77 Operation And Maintenance Manual

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 contamina-
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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
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if worn.
4) Be sure to place a light coating of lubricant on all
internal moving parts, o-rings, and washers. However,
do not lubricate the Teflon
dust and debris.
Be sure to lubricate all parts, with the exception of
the valve seat, prior to reassembly.
Install the o-ring on the defogger bonnet.
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
seat, as this will attract
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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:
Washers, o-rings
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
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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
Install the washer on the defogger valve stem.
Kirby Morgan
washer and new o-ring
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washer and the control knob
77
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