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Section V. PACKING PROCEDURES
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TM-5-4220-201-12 Life Preserver Underarm Parachutist Type B-7 Coinflated FSN 4220- 657-2197 Manual
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Figure 4-3. Inserting CO2, cylinder into cylinder valve.

TM 5-4220-201-12
b. Check the mouth inflation valve (fig. 2-7) to insure
that threads are not damaged and that there are no
obstructions in the valve opening.
c.  Insert the cylinder into the cylinder valve on the
deflated flotation cell (fig. 4-3) and tighten firmly by hand.
Make sure the valve stem gaskets are serviceable and the
valve stem is tight. On life preservers having a set screw,
be sure the set screw is tightened.
d. Make a safety tie on the valve discharge lever (fig. 4-
1) with one turn #3 cord cotton thread, using a surgeon's
knot and a locking knot.
e. Slide the cylinder into the cylinder pocket (fig. 1-5).
Be sure each cell marked "left" or 'Fright" is matched with a
container having the same marking.
f. Adjust the mouth inflation valve to the closed position
and insert the valve into the valve retaining sleeve (fig. 4-4).
g.  Hook the container snap through the flotation cell
grommet (fig. 4-5)
h.  Fold the cell to a size equal to that of the cell
container; begin at the narrower section of the cell. Pack
the folded cell into the container.
i. Close the container bottom (fig. 4-6) and top (fig. 4-
7) flaps and tie with one turn of #3 cord cotton thread, using
surgeon's knot and a locking knot.
4-17

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