EOTech CNVD-T3 Clip-On Night Vision Device - Thermal 3 - Manual (Page 60)

3-8
e. Install objective lens cover and lens cover straps per
paragraph 3.3.2.
f. If necessary, readjust objective lens protective ring
to ensure it does not prevent the objective lens
cover from forming a tight fit over the objective lens,
when closed.
3.3.4 Replacing Battery Compartment O-Ring
. No tools are
required to perform this procedure.
a. Unscrew the battery cap until it comes free of the
battery compartment threads.
b. Use the fingers of one hand to squeeze the battery
compartment o-ring while simultaneously pushing it
out of its groove. Grasp the o-ring with fingers of the
other hand and pull it off the battery compartment
threads.
c. Apply a few drops of isopropyl alcohol to a cotton
swab and clean the retaining groove of any dirt,
grease, or debris.
d. Apply a thin, even coat of fluorinated grease to the
replacement o-ring.
e. Stretch the replacement o-ring over the battery
compartment threads and slip it into the first groove
below the threads.
f. If necessary, use a cotton swab to remove any
excess grease from the o-ring and battery
compartment threads to prevent accumulation of
debris.