12
SEa lV2 Technical Maintenance Manual
REaSSEMBly pRocEDuRE
First Stage Reassembly
32
33
34
23
26
23
22
CAUTION:
Before proceeding, visually inspect the
cylinder according to compressed gas association
(cga) standards pamphlet (cga c-6.1--2002, "STan-
DaRDS FoR ViSual inSpEcTion oF high pRESSuRE
aluMinuM coMpRESSED gaS cylinDERS"). This
inspection requires a visual inspection light. if the
cylinder does not pass the visual inspection, it must
be serviced or replaced with a new cylinder before it
can be assembled and filled.
1. Install a new, lightly lubricated o-ring (37) over the cylin-
der threads so that it is seated against the first stage body.
Lubricate the first 4 to 5 threads on the first stage body with
Christo-lube
®
.
2. Thread the first stage into the cylinder until hand tight.
Attach a 1 3/16" crowfoot adapter to a torque wrench. Place
in cylinder vise or apply a strap wrench to the cylinder. While
holding the cylinder firmly, torque the first stage body to a
torque value of 25±2 ft/lbs.
3. Install a new, lubricated piston shaft o-ring (33) and pis-
ton head o-ring (31) onto the piston (32). Closely inspect the
edges of new HP seat (34). One edge is sharp and one edge
has a chamfer. With the chamfered edge facing outward,
press the HP seat into the small, recessed hole in the end of
the piston. Put the piston down on a clean, hard, flat surface
to seat completely.
4. Place the spring (35) into the body. Press the piston into
the cap (30) so that the piston head is seated flat against the
cap. Lightly lubricate the male threads on the body.
5. Pass the piston shaft through the spring. While pressing
down on the cap, hand tighten the cap onto the first stage by
turning clockwise. Tighten the cap with an adjustable span-
ner wrench (p/n 107394) until the cap stops against the first
stage body.
6. Install a new, lubricated o-ring (25) onto the shaft of the
check valve (26). Install a new, lubricated o-ring (22) onto the
fill port plug (21).
7.
Install a new, lubricated o-ring (22) onto the fill adapter
port. Insert the check valve (26), o-ring side first, into the
male-threaded end of the fill adapter port (23).
