Aqua Lung EA-4500 LW Technical Manual page 6

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8. Insert the squared end of the stem (17) into the seat &
disc retainer (16). Unscrew the seat & disc retainer from the
HP module body (13). Use the magnifier tool to inspect the
seat & disc retainer crown. There should be no scratches,
nicks or dents on the crown seating surface.
9. Remove the dial indicator gauge (14) from the HP
module body (13) using a 7/8" crowfoot and flex wrench.
Remove o-ring (15) from the dial indicator gauge.
10. Unscrew the fill port cap (31) from the end of the fill port
(32). Remove the o-ring (15) from the fill port cap.
11. Using a 9/16" socket and flex wrench, unscrew the fill port
(32) from the HP module body (13). Remove the fill port pin
(34) from the fill port.
NOTE: Take care not to lose the fill port pin when
removing the fill port. It is possible that the fill port
pin may have remained in the HP module body
during removal.
Seating Surface
SEA-3000 LW & SEA-4500 Technical Manual
12. Remove o-ring (15) from the fill port (32) and o-ring (33)
from the fill port pin (34).
13. Use diagonal pliers to cut strap clamp (60) off the first stage
cover (1). Remove first stage cover from LP module body (8).
14. Using a 10mm hex bit socket and flex wrench, unscrew
the spring adjuster (2) from the diaphragm clamp (3). Remove
the MP spring (4) and the spring carrier (5).
15. Cut the safety wire (36) with diagonal pliers. Unscrew the
LP module body (8) from the HP module body (13).