Remove existing chinstrap and
Remove earcups, communication
cord, and TPL liner.
If the helmet is Combat Edge
equipped, remove the bladder & hardware.
template with the existing chin strap and nape
strap holes. Using a pencil and the proper-size template,
mark each side of the helmet shell with the new hole locations.
Using a center punch, indent the
shell at the new hole locations.
Using a 1/16" bit, drill a pilot
hole in each location. Exercise care when drilling through pile
(inside helmet cloth).
Using a 1/4" bit, finish drilling
the three holes.
Using a flexible straight edge,
draw two lines connecting the outer edges of the 3 chinstrap holes
in the front of the shell.
Elongate the three chinstrap
holes for eyelet installation using a small saw blade to cut slot.
File as necessary until eyelet fits.
Insert one side tab of plastic
strap grommet into slot in shell from outside, gently work two small
end tabs into shell, and then work the final side tab through slot
Fill old nape strap hole with
epoxy. Allow epoxy to harden properly before proceeding.
Trim pile fastener or leather as
necessary to ensure eyelet slot is fully accessible.
Re-adhere pile fastener or
leather to shell, this is the cloth inside that the earcups velcro
Trim the aft lower corners of the
helmet liner as required for attachment of the nape straps and nape
Insert left and right nape straps
through the eyelets from front to rear.
Insert nape straps through nape
Install chin/nape straps with
If Combat Edge kit was removed-
reinstall at this time.
Install helmet liner (TPL, etc).
Route ear-to-ear cord between
liner and edgeroll and install earcups.
Have crewmember don helmet.
Adjust height of nape strap pad
by loosening attaching hardware, rotating nape strap pad strap(s) up
or down, and tightening hardware.
Adjust nape strap tension using
nape strap clamps on the left and right nape straps.