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12
22. Attach a mP test gauge (PN 111610) to the open LP
port. Attach the regulator to a fully charged cylinder (2500+
psi). slowly open the cylinder valve to pressurize the regu-
lator. using an 8mm hex key, turn the adjustment screw to
set the medium pressure to 135±5 psi. Turn clockwise to
increases pressure, counterclockwise to decrease pressure.
with every quarter turn, cycle the regulator with the lever or
bleed screw.
23. using a 1/4" nutdriver, turn the locknut clockwise
(tighten) until the regulator starts to leak air. Turn the locknut
counterclockwise (loosen) just until the leak stops, then go an
addition 1/4 turn counterclockwise.
24. Install the remaining port plug(s).
Regulator housing Reassembly
1. Install the large o-ring (42) into the regulator body (47).
Pass the regulator body through the front of the inhalation
box (25). The hole in the inhalation box is keyed, so the body
will only go in one way.
MENTOR Technical Maintenance Manual
2. Place the washer (24) over the regulator body, against
the inside of the inhalation box. Thread the retaining nut (23)
onto the body. Place the nut spanner tool (PN 7-0550) over
the retaining nut. Rotate the tool until the pins on the tool
mate with the holes in the retaining nut. with a 3/4" socket
attached to an in/lb torque wrench, tighten the retaining nut to
40±2 in/lbs.
3. Pass the stem of a new exhaust valve (21) through the
center hole located on the inside of exhalation box (20).
using your thumb, press on the center of the valve until the
barb passes through the hole. Lift up on the edge of the valve
to make sure the barb went all the way through and the valve
is secure.
4. Install the demand diaphragm (22) into the inhalation box
with the diaphram strike plate facing the lever.
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