Precautions For Cleaning - Kirby Morgan 77 Operation And Maintenance Manual

Kirby Morgan 77
®
7.9 Cleaning REX

7.9.1 Precautions for Cleaning

The inlet valve of the REX
ing and lubrication due to the exacting tolerances of
the inlet valve mechanism. Once familiar with this
procedure the task can be accomplished in about 10-
15 minutes. The following procedure is intended as
a routine maintenance of the inlet valve mechanism.
If an annual overhaul is being done, replacement of
all O-rings is required.
CAUTION
Use only mild soap such as hand dish
washing soap. Use only a tube brush that
does not have an exposed metal tip, or
use an all plastic brush. A tube brush with
hard metal components could scratch the
plated surface of the balance chamber.
7.9.2 Cleaning Instructions
1) Remove the O-rings from the main tube, inlet valve,
adjustment shaft, inlet nipple.
2) Using a wooden tooth pick, carefully remove the
inlet valve soft seat from the inlet valve. Inspect the
inlet valve for excess wear or damage. Follow replace-
ment procedures if necessary. If the seat looks accept-
able, simply clean and re-lubricate prior to reassembly.
3) Carefully clean all regulator components using
a solution of dish soap and water, remove corrosion
by soaking for 15-30 minutes in a 50/50 solution of
vinegar and water. A tube brush should be used to
clean the inside of the main tube.
Main
tube
Horseshoe
O-ring
Inlet valve
Use extreme care when cleaning the nipple tube
and main tube to avoid damage.
104
Regulator Parts
®
requires frequent clean-
®
Roller
lever
Adjustment
lock nut
Nipple tube
© ⅯⅯⅩIⅡ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318003
Use care not to scratch the metal surfaces with the
end of the tube brush. Use a soft nylon brush on all
other surfaces. After cleaning rinse thoroughly with
warm fresh water and blow or air dry.
4) Lay out all components and carefully inspect using
a bright white light for signs of damage, replace any
components in question, re-clean any components that
show signs of contamination.
When completing a scheduled overhaul, always re-
place the diaphragm, exhaust valves, o-rings. Replace
any and all components that show signs of wear or
damage.
5) Inspect the inlet valve to ensure the area where the
soft seat lays is clean and free of old silicone sealant.
If damage to the inlet valve seat is discovered, the
seat can be replaced to return the assembly to good
working order. Use a wooden toothpick to clean out
the small vent hole of old silicone sealant.
Note: If you are replacing the inlet valve seat, be
sure to perform this step at least 12 hours prior to
rebuilding the regulator, so the silicone sealant will
have time to dry.
CAUTION
Use extreme caution when cleaning the
balance chamber. A brush with hard metal
components could damage the balance
chamber.
O-ring
Spacer
Spring
Spacer
Sleeve
The adjustment system must be clean and properly
lubricated to turn freely.
Knob
Roll pin
Nut
Adjustment
shaft