TM 5-1940-321-13&P
( 4 ) Remove the valve insert and replace it with the spare valve insert provided with
each craft. If the spare valve insert is not available, check the metal valves
insert for dirt or foreign objects under the diaphragm or for an improperly
seated diaphragm. Remove, clean and reverse the metal valve insert flat
neoprene gasket; then reinstall.
b. Direct Support Additional Action. If the steps listed in paragraph 7-9a do not stop the
intercommunicating valve leak, then the following action should be taken by direct support personnel:
( 1 ) Service the valve in accordance with the scheduled maintenance procedure in
( 2 ) Leak test the valve as describe in chapter 6, paragraph 6-3, to determine the
exact point at which the valve is leaking and the appropriate corrective
maintenance action required. Figures 7-1 through 7-5 show the specific cause
of different types of valve leaks. Table 7-1 references corrective maintenance
procedures by valve type.
7-10. KEEL VALVE LEAKS
a. Unit Personnel Immediate Action. Immediate corrective action for keel valve leaks by unit
personnel includes the following:
( 1 ) Tighten the keel valve cap firmly by hand.
( 2 ) Replace the keel valve cap with the spare valve cap provided with the repair
kit. If the spare valve cap is not available, remove the valve cap gasket from
the leaking valve cap, turn it over, grooved side to the cap, and reinstall it.
( 3 ) Remove the keel valve insert and replace it with the spare valve insert provided
with each craft. If the spare valve insert is not available, check the valve insert
for dirt or foreign objects under the diaphragm or for an improperly seated
diaphragm. Remove, clean and reverse the metal valve insert flat neoprene
gasket; then reinstall.
b. Direct Support Additional Action. If the steps listed in paragraph 7-10a do not stop the keel
valve leak, then the following action should be taken by direct support personnel:
( 1 ) Service the keel valve in accordance with the scheduled maintenance
procedure in chapter 5, paragraph 5-14.
( 2 ) Leak test the keel valve as described in paragraph 6-3 to determine the exact
point at which the valve is leaking and the appropriate corrective maintenance
action required. Figures 7-1 through 7-5 show the specific cause of different
types of valve leaks. Table 7-1 references corrective maintenance procedures
by valve type.
7-8