35
Chapter 3: Helmet Maintenance
2. Referring to
, disconnect the
earphone from the cable as follows:
a. Use a jeweler’s screwdriver to
loosen
(not remove) the set screws
on the back of the earphone.
b. Withdraw the cable leads from the
earphone.
NOTE:
Ensure that the metal stay on
the cord does not contact the earcup
grommet; this will hinder the removal of
the grommet.
c. If you are replacing the earcup,
remove the small rubber grommet
from the hole in the earcup, and
withdraw the cable leads from the
earcup.
3. Obtain a replacement earcup or earphone as applicable.
4. Referring to
, connect the earphone to the cable as follows:
a. If you are replacing the earcup,
insert the cable leads into the replacement earcup
through the small hole, and insert the small rubber grommet into the hole. Ensure that
the grommet is seated properly.
NOTE:
To ease insertion of the grommet, you may lubricate the grommet with a small
amount of soap and water or 70 percent isopropyl alcohol.
b. Insert the cable leads into the earphone.
c. Use a jeweler’s screwdriver to tighten the set screws on the back of the earphone.
5. Referring to
(previous page), install the earphone into the earcup as follows:
a. Insert the earphone into the earphone holder.
b. Insert the earphone holder into the earcup. If you removed the earseal, reinstall it on
the earcup.
c. Reattach the earcup to the pile fastener inside the helmet.
6. If necessary, repeat Steps 1-5 for the other earcup or earphone.
7. Check earcup position as described in Paragraph 2-2.3, and make any necessary
adjustments.
Figure 3-6. Earcup, Earphone, and Cable
Earcup
Cable
Cable leads
Set screws
Grommet
Metal stay
Earphone
