TM 5-1940-321-13&P
( 2 ) Deflate the keel by removing the metal valve cap and metal valve insert. See
Figure 5-12. Keel Valve Metal Cap and Metal Valve Insert
CAUTION
Do not use grease on any neoprene parts.
( 3 ) Figure 5-13 shows the parts of the keel valve that will be serviced, Remove the
disk-shaped valve cap gasket (item 2) from the metal valve cap (item 1). Clean
the valve cap gasket by rubbing it between your thumb and fingers. Inspect the
valve cap gasket for wear and deterioration. Rings are normally worn into the
gasket where they contact the metal valve insert (item 3). The gasket may be
reused if it does not have circular grooves on both sides. If the gasket has rings
worn into it on both sides, it must be replaced with a new gasket. Gaskets that
show signs of cracking should also be replaced. Cracking is easier to detect if
the gasket is stretched slightly and folded during the visual inspection.
5-24