TM 5-1940-321-13&P
( 9 ) Using the dremmel tool, lightly grind the inside of the hose section. Exercise
caution to avoid damaging the hose. Remove all residue.
( 10 ) Mix neoprene glue. Treat the scuffed area inside the hose with toluene and apply a
moderate coat of glue, two inches into the inside of the hose.
( 11 ) Duplicate the markings made on the old valve in step ( 4 ) on the new valve. Insert
the hose over the hose neck of the new valve as far as possible. Verify that the
markings on the hose align with the markings on the valve. The correct alignment
is necessary for proper airflow.
( 12 ) Apply a stainless steel hose clamp over the hose at the valve hose neck and
tighten securely.
( 13 ) Wrap the hose clamp with several turns of electrical tape. Ensure that all sharp
edges of the hose clamp are covered with electrical tape. Wrap the tape tightly to
ensure it will remain in position when subjected to warm ambient temperatures.
( 14 ) Install new large inner neoprene valve base washer over the valve base flange as
shown in figure 7-16. Insert the valve base through the fabric and install and tighten
the base nut using the half-moon spanner.
( 15 ) Referring to Appendix F, apply an inner patch to the incision using hypalon
neoprene fabric and neoprene glue.
( 16 ) Wait 12 hours for the glue to develop sufficient bond strength; then reassemble the
valve and inflate the craft to 180 mbar (2.6 psi). Check for leaks using the air leak
test in chapter 6.
( 17 ) If no leaks are observed, apply an outer patch over the incision as described in
( 18 ) Wait 48 hours before inflating the craft to 240 mbar (3.5 psi).
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