Aqua Lung Micra Air System User Manual page 15

8. Turn the compressor fill valve completely closed. While
holding the first-stage and compressor fill adapter se-
cure, turn the M.A.S. cylinder clockwise until it stops and
the indicator pin is visible inside the "OFF" aperture.
CAUTION: DO NOT turn the first-stage any further than is
necessary to shut the valve. Doing so will cause undue
stress and possible damage to the main valve, and may bend
the indicator pin.
9. Hold the second-stage purge button depressed until
airflow can no longer be heard from the second-stage and
the LP hose is depressurized.
10. While holding the M.A.S. cylinder supported, turn the
yoke screw of the compressor fill yoke counter-clockwise
to loosen until the compressor fill valve can be removed
from the block of the fill valve adapter. Return the
compressor fill yoke to its storage location.
11. Examine the pressure gauge assembly to ensure that the
O-ring appears to be clean and dry, without any signs of
decay or damage, and is seated evenly at the base of the
threads. If the O-ring appears to be in worn or damaged
condition, it is important to obtain a new O-ring from an
Authorized Aqua Lung Dealer before attempting to use
the M.A.S.
12. Examine the opposite side of the pressure gauge assem-
bly to ensure that it is completely clean and free of any
debris or signs of damage which may prevent it from
reading clearly and accurately.
13. Mate the threaded end of the pressure gauge assembly
into the open HP port and turn clockwise by hand until
finger snug. Apply either a n" open-end wrench (as
required) and tighten the pressure gauge assembly to a
light torque measurement of 20 inch-pounds, within 5
inch-pounds, plus or minus. DO NOT overtighten.
Micra Air System Owner's Manual 15
Aqua Lung International, Inc.