TM 1-4220-250-12&P
4.6.2
Service Inflation Assembly and C02 Cylinder (Continued).
2.
Installation of C02 Cylinder. To install a C02
cylinder on the life raft, proceed as follows:
a.
Remove and discard ordnance tape. Ensure
set screw is loose so as to not damage C02
cylinder threads.
NOTE
Do not discard set screw.
b.
Weigh
a
charged
C02
cylinder
(MIL-C-
52053TC) and compare the minimum stamped
weight with the scale weight. Discard and
replace cylinder if scale weight is less than total
stamped weight on cylinder.
NOTE
Weight will vary according to manufacturer.
c.
Ensure that inflator lever is in the cocked
position.
d.
Install seat seal gasket.
e.
To assure a firm cylinder seat, conduct a
cylinder thread count. The threaded portion of
cylinder neck shall contain a minimum of seven
full threads to assure a firm cylinder seat within
valve body. Any cylinder found with less than
seven full threads shall be discarded.
CAUTION
Steel threads on C02 cylinder can cause
damage to aluminum threads on inflator if
cylinder is not carefully threaded. If
binding occurs during threading, replace
cylinder.
f.
Using the Cylinder Thread Chaser Die, turn
thread chaser to the full extent of the threads on
C02 cylinder to cut free any excessive cadmium
plate covering the threads.
g.
Lightly coat base of piercing pin with silicone
lubricant (D16).
h. Screw cylinder into valve by hand until it bottoms
against the gasket. Tighten an additional 1/2 to
3/4 turn.
i. Tighten locking screw to hold C02 cylinder in
place.
j.
Wrap ordnance tape (D18), cut to size, around
inflator assembly neck to cover locking set
screw.
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