Aqua Lung ABS SECOND STAGE Technical Maintenance Manual page 5

ABS Second Stage Technical Maintenance Manual
NOTE:
Because the crown is o-ring sealed,
it will not freely exit the valve body after it
has been disengaged. The following step
must be performed correctly in order to
remove the crown without damaging its
delicate sealing surface.
9. When the crown has been unthreaded from the inlet fitting
(12), carefully insert the pin of the extraction tool (P/N 109437)
into the opposite end of the inlet fitting and through the center
of the crown. Gently press the crown out onto a padded sur-
face (see Fig. 1). Remove and discard the crown o-ring (20).
Fig.1 - Crown Removal
10. Closely examine the crown with the use of magnifier
to check for any scoring, nicks, or other damage to the
polished sealing surface. If damage is found, discard the
crown, and do not attempt to reuse. If it is in reusable
condition, set it aside on a soft surface to prevent damage
to the sealing edge.
11. Press the valve body (4) with lever assembly into the box
bottom (19) by inserting a finger through the inlet opening.
Gently lift the assembly out of the box bottom, being careful
to avoid pulling or tugging on the lever(3).
WARNING:
up the valve subassembly are under
spring tension. Disassemble according
to instructions found in the next step.
Failure to wear proper eye protection
could result in an eye injury should the
components (1-8) eject out of the valve
body (4).
The components that make
12. Stand the valve assembly vertical on the head of the
poppet (7), with the lever facing up, and depress the valve
body to expose the locknut (1). While holding the valve body
fully depressed, apply a 1/4" nut driver to turn the locknut
counter-clockwise until it has disengaged from the threads
of the poppet. Remove the locknut, washer (2), and lever,
and slowly relax the valve body (4) to lift it off the poppet and
spring (6). Discard the locknut, and do not attempt to reuse.
13. Closely inspect the shape and condition of the lever (3)
to ensure it is not bent, corroded, or otherwise damaged. If
any signs of damage or corrosion are found, discard the
lever and do not reuse.
14. Closely examine the poppet spring (6) with a magnifier
to ensure it is not damaged (bent) or corroded. If any signs
of damage or corrosion are found, discard the spring and do
not reuse.
15. Using a plastic or brass o-ring tool, lightly stick the center
of the LP seat (8) inside the head of the poppet (7) and lift the
seat out, being very careful to avoid damaging the poppet.
Set the seat aside to be used as an aid during reassembly,
and inspect the head of the poppet to check for any nicks,
scratches, or other signs of damage. The through-hole
beneath the LP seat cavity should be clear and free of any
obstructions. If any signs of damage are found, discard the
poppet and do not attempt to reuse.
NOTE:
The used LP seat is an essential aid
to the reassembly procedure for the valve
body. Do not discard the seat until the
reassembly and final adjustment procedures
have both been performed, and the regulator
is functioning satisfactorily.
16. Place the handle of the extraction tool directly over the
poppet bearing (5) in the top center of the valve body (4),
and press downward until the poppet bearing has dropped
out. Discard the poppet bearing, and do not reuse.
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