10
SEa lV2 Technical Maintenance Manual
21. Remove the o-rings (31 & 33) from the piston and dis-
card. Insert the pin of the seat extraction tool (p/n 109437)
22. Use a cylinder vise or place a rubber strap wrench
onto the cylinder (38) to hold it secure while it is turned in a
clockwise direction. While holding the cylinder secure with
the strap wrench, unscrew the first stage body (36) from the
cylinder using a 1 3/16" crowfoot & flex handle drive.
CAUTION:
Ensure that the crowfoot is not over the
hole for the bonnet (13) as damage to the bonnet
opening could result.
23. Remove and discard the o-ring (37) from the cylinder
threads.
Second Stage Disassembly
1. Using small wire cutters, carefully snip the plastic mouth-
piece clamp (55) and remove the mouthpiece (66) from the
box bottom (63). Inspect the mouthpiece to ensure it is free
of any tears or cuts that may cause leakage of water into the
second stage or other discomfort. Discard the mouthpiece or
set it aside to be reused, depending on its condition.
2. Using your fingers, unscrew the front cover (59) from the
box bottom (63). Using the Micra Retaining Ring Tool
(p/n 100188), unscrew the retaining ring (60).
3. Lift out the purge cover (61) and diaphragm (43). Inspect
the diaphragm for any tears or pin holes by holding it up to a
light and gently stretching around the perimeter.
4. While depressing the lever (45), unscrew the inlet fitting
(52) using a 3/4" wrench or socket. Remove and discard the
inlet fitting o-ring (14).
inlet fitting
