TM 1-8415-216-12&P
WARNING
2. If the M43 CB mask is worn, attach the headset to the intercommunications unit
(Item 15, Appendix B). This will allow communications during the fitting process.
CAUTION
When donning or removing helmet, spread helmet just enough to
clear head. Excessive spreading may damage helmet.
3. Have the operator/wearer don the helmet as follows:
a. Hook thumbs in earcups and spread helmet slightly.
b. Position helmet firmly against forehead; rotate helmet rearward and down
onto head.
c. Press helmet down firmly with both hands to ensure that helmet is properly
positioned on head.
4. Align the edge of the helmet with the forehead reference point (marked in the
previous procedure).
Do not remove any plastic layers from the lining, helmet, shock (TPL).
Removal of plastic layers will result in decreased helmet stability
and may cause injury or death.
Do not add loose plastic layers to the lining, helmet, shock (TPL).
Adding loose plastic layers will result in decreased helmet stability
and may cause injury or death.
5. Adjust the earcups so that they cover the operator/wearer’s ears. If earcup
pressure is too great without fitting pads, select the next larger helmet size.
Check the earseal compression; earseals should be compressed evenly and to
the greatest degree possible without causing discomfort. Proper earseal
compression may be indicated by a visible ring impression around the ear when
the helmet is removed. If no ring is visible, check carefully to see that none of
the ear is pinched under the earseal. Always ask the operator/wearer if the ear
is centered in the earcup.
6. If the earseals are not sufficiently compressed, add earcup spacer pads as
required between the earcup retaining pad and the helmet shell (NOT between
the earcup and the retaining pad).
NOTE
The doughnut-shaped pads and the
oval pads may be installed whole,
cut in half vertically to adjust for-
ward/rearward earcup tilt, cut in
half horizontally to adjust up/down
earcup tilt, or cut in other ways as
required to achieve proper earseal
compression.
Figure 4-8 illus-
trates the more common ways of
trimming the earcup spacer pads.
You may have to try various combi-
nations of pads to achieve proper
earseal compression.
Figure 4-8. Spacer Kit, Earcup Flyer’s
4-13
