TM 5-1940-321-13&P
a. Unit Personnel Immediate Action. Immediate corrective action for a leaking CO2
overpressure valve by unit personnel includes the following:
( 1 ) Slap the valve smartly using the palm of your hand. This is intended to reseat a
leaking CO2 over pressure valve.
( 2 ) The red plastic CO2 overpressure valve caps supplied in the onboard repair kit,
if not in place should be installed over the CO2 overpressure valves. The
neoprene flat gasket must be in place inside the red plastic valve cap to
provide an air seal.
NOTE:
The CO2 overpressure red plastic valve caps may be left in place on the valves
at all times except during CO2 inflation.
b. Direct Support Additional Action. If the steps listed in paragraph 7-11a do not stop the CO2
overpressure valve leak, then the following actions should be taken by direct support personnel:
( 2 ) Perform the air leak test described in chapter 6, paragraph 6-3 to determine the
exact point at which the CO2 overpressure valve is leaking and the appropriate
corrective action required. Figures 7-1 through 7-5 shows the specific cause of
different types of valve leaks. Table 7-1 references corrective maintenance
procedures by valve type.
NOTE:
The following procedure assumes the CO2 inflation system is not installed.
a. Unit Personnel Immediate Action. For unit personnel, immediate corrective action for
leaking CO2 inlet valves is limited to tightening the slotted nylon plug in each valve until the plug contacts
the small O-ring at the bottom of the female threaded fitting. Verify that the small neoprene O-ring is in
place.
b. Direct Support Additional Action. If the above action does not stop the CO2 inlet valve from
leaking, then the following actions should be taken by direct support personnel:
7-9
