Second Stage (Mk) Disassembly - Aqua Lung SEA LV2 Technical Manual

8
24. Remove o-rings (3 & 5) from the piston (4). Insert the
seat extraction tool into the open end of the piston and push
out the HP seat (6).
CAUTION: Ensure that the crowfoot is aligned with
the wrench flats on the first stage body (8). Do not
position the crowfoot over the bonnet opening as
this will cause damage, resulting in replacement of
the first stage body.
NOTE: Another option is to use vise jaw inserts (PN
100398) in conjunction with a bench vise to remove the
first stage body (8) from the cylinder (43).
25. Secure the strap wrench
to the cylinder (43). Using a 1
3/16" crowfoot and flex wrench,
unscrew the first stage body
(8) from the cylinder. Remove
o-ring (30) from the first stage
body.
NOTE: Before beginning reassembly,
perform parts cleaning and lubrication in
accordance with Procedure A: Cleaning
and Lubricating.

Second Stage (MK) Disassembly

1. Use diagonal pliers to cut the strap clamp (50) and remove
the mouthpiece (49) from the box bottom (54). Inspect the
mouthpiece to ensure it is free of any tears or cuts that may
cause water leakage into the second stage or discomfort
during use. Discard the mouthpiece if damage is found or
set it aside for reuse if the condition is acceptable.
2. Using your fingers, unscrew
the hard cover (45) or retaining
ring and front cover (46 & 44)
from the box bottom (54).
3. Lift out the ring cover support (47) and diaphragm (48).
Inspect the diaphragm for any tears or pin holes by holding
it up to a light and gently stretching around the perimeter. If
the condition is acceptable, set it aside for reuse.
4. Using a 3/4" thin wrench,
remove the inlet fitting (51)
from the box bottom (54).
5. Grasp the lever (60) and
remove the valve body as-
sembly from the box bottom
(54). It may be necessary to
push the valve body assembly
through the inlet hole into the
box bottom.
SEA MK / LV2 Technical Manual