Aqua Lung FIRST STAGE Service Manual page 11

3. Position the anti
extrusion washer
(119129) in the plug
(129604 / 129709 /
129746) with its concave
side facing out. Lubricate
the new washer (124612)
well and fit it into the
plug, against the washer
(119129). Visually check
that the O-ring is
correctly in contact.
Lubricate the O-ring
4. Fit a new lubricated O-ring (213714) onto the plug
(129604 / 129709 / 129746).
5. Fit a new HP seat (124624), with its blue face toward
the interior of the body. Check that the seat sits upright
inside the body. Position the spring (122244) around the
seat.
6. Fit an 8mm Allen key into the plug (129604 / 129709 /
129746). Engage the plug into the regulator body. Push
on the plug to compress the spring, at the same time
screwing the plug into the body until it blocks. Using a
torque wrench, tighten the plug to 0.5 m.Kg.
Service Manual 1st stage Legend
Rev. 12/2011
Service manual First stage Legend
7. Turn the regulator over so that the MP side faces you.
Insert the pin (A02002) into the central hole. Place the
pin support (129121) over the pin. Press several times
on the pin support. It should feel like a push-button.
8. Fit a new diaphragm (119159) into the fry chamber
(body side). Make sure that the diaphragm is correctly
positioned by pressing all around its edge with your
finger.
9. Screw the holding tool 116230 into a HP port and clamp
the tool in a vice, diaphragm upwards.
Screw the dry chamber (129602) fully onto the body by
hand. Place the tool 122152.
Using a torque wrench, tighten the dry chamber at 2.5
m.kg.
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