TM 5-1940-321-13&P
Installing an External Neoprene Valve Insert Base.
( 4 ) Using a dremmel tool and aluminum oxide stone, carefully smooth any rough
edges where the neoprene was cut inside the craft, and verify that any
protrusions are ground away.
( 5 ) Prepare to mount a new neoprene valve insert base on the outside of the
buoyancy tube. First center the new valve base in position over the hold and
then trace its outline using a silver pen. Using a dremmel tool, grind the inside
of the hole to increase its diameter approximately 1/8-inch. Trial fit the valve
base to verify that it fits easily into the hole.
( 6 ) Using a dremmel tool, lightly scuff the fabric within the traced circle. Also scuff
both flat surfaces of the valve base. Remove all dust.
( 7 ) Tape around the scuffed area on the buoyancy tube. Begin the glue schedule
(Appendix F, Table F- 1) using toluene solvent and neoprene glue.
( 8 ) Remove all tape and attach the valve base to the buoyancy tube. Bone it down
firmly using a boning knife.
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