TM 5-1940-321-13&P
( 7 ) Remove the pressure gauge and replace the metal valve cap.
( 8 ) Remove the metal valve cap from the keel valve and insert the pressure gauge
firmly into the valve opening.
( 9 ) On page 2 of the pressure test data sheets (figure 5-23), record the exact
end-of-test keel pressure and the time.
( 10 ) Use the Pressure Test Data Sheets to calculate the pressure loss corrected for
any difference in ambient temperature recorded. Any craft that loses more than
30 mb (.44 psi) of pressure over a 24-hour period (after corrections for
temperature differences), from either the buoyancy tubes or keel, requires a
leak test and corrective maintenance. Refer to chapter 6, paragraph 6-3 for
leak testing.
( 11 ) Replace any metal valve caps.
( 12 ) Replace the isolator clamps on the two inflation hoses that connect the upper
buoyancy tubes to the lower buoyancy tubes. The correct position for the
clamps is in the center of the straight portion of the hoses below the elbows.
Tighten the wing nut firmly by hand until the hose is pinched flat.
( 13 ) Stow the foot pump and air hose in the pouches near the bow.
5-19. INTERMEDIATE MAINTENANCE. There are no scheduled maintenance actions that require
intermediate level (general support) services. All scheduled maintenance is accomplished at the
organizational level (see table 5-1) using only unit personnel.
5-20. MAINTENANCE INSPECTIONS. Maintenance inspections are identified in the scheduled
maintenance action index, table 5-1. All scheduled maintenance inspections are accomplished at the
organizational level without the assistance of general support personnel. Maintenance inspections are
recorded using the forms in Appendix H.
5-21. SCHEDULE. Scheduled maintenance is accomplished in accordance with the following schedule.
The paragraph references identify the procedure to be followed:
5-36