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© ⅯⅯⅩⅢ Kirby Morgan Dive Systems, Inc. All rights reserved. Document # 130318002
Chapter 7 - Oral/Nasal Mask
Kirby Morgan
®
37SS
Valve
Valve Body
Regulator Mount Nut
Nose Block Packing
Port
Port Retainer
Oral Nasal Mask
Nose Block Device
The oral nasal mask and the parts associated with it are easy to access.
Press the cover over the diaphragm.
8) With the cover pressed tight against the diaphragm,
if the regulator starts to free flow, the lever may need
to be bent down slightly. If the regulator does not free
flow, slowly depress the purge button until a slight
free flow develops. The purge button should depress
no further than
1/8
inch (3.0 mm) before the regulator
develops a flow.
If the regulator does not develop a slight free flow
when the purge button is depressed in
1/8
inch (3.0
mm), then the lever will require slight upward bend
-
ing.
Before bending the lever, double check the adjust
-
ments. It is rare that the lever requires bending in
a regulator that has been in service. Usually levers
only require bending in new installations or because
of damage during disassembly.
9) Install the clamp and clamp screw. Tighten the
screw to the correct torque (see appendix for torque
specifications).
10) Again, press on the purge button in the cover. It
must have
1/16
inch (1.5 mm) minimum and
1/8
inch
(3.0 mm) maximum free travel before it contacts the
diaphragm. If there is more than
1/8
inch (3.0 mm)
travel, the lever must be bent upward, per this chap
-
ter. If the button has only slight or no free travel, the
lever must be bent down.
B
WARNING
The lever nut must not be loosened
more than
⅛
turn to lower the height
of the lever. If more adjustment is nec-
essary the lever should be bent down-
ward. If the lever nut is loosened more
than
⅛
turn the lever will not have
enough travel for proper flow rates.
11) If the purge button travel is correct, the adjust
-
ment is complete.
7.14 Oral/Nasal Mask
7.14.1 Oral/Nasal Removal
Tools Required:
7/16
inch Open-end Wrench
