TM 5-1940-321-13&P
Figure 5-13. Keel Valve Parts to be serviced.
( 4 ) Remove the diaphragm (item 5) from the metal valve insert by pulling it, large
end first, out of the valve insert. Clean the diaphragm by rubbing it between
your fingers and thumb. Visually inspect the diaphragm while stretching it
slightly. Diaphragms with cracks and cuts must be replaced.
( 5 ) Remove the ring-shaped flat neoprene valve insert gasket (item 4) from the
metal valve insert. See figure 5-14. Clean by rubbing it between your fingers
and thumb. Inspect for cracks while stretching it slightly as shown in figure 5-
15. Replace if necessary.
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