Figure 3-51 Night Sight Cover Actuator
(c) Perform purging and charging procedure para
(d) Remove outlet port screw and discard.
(e) Purge instrument at 4 psig for 3-5 minutes or
until all visible traces of moisture are gone.
(f) Apply thin coat of lubricant (item 3, appx B) to
o-rings of replacement outlet port screw and install.
(g) Torque outlet port screw to 10-12 in-lb (12-14
(h) Charge instrument at 4 psig for 10 minutes.
(i) Leak test instrument for minimum of l0 minutes.
If leak is detected, repair per table 3-2.
Table 3-2 Leak Test, Commanders Relay
ferred for M2,
M3, M2A1, and
all other parts of
(j) For M2A2 and M3A2 only, apply primer item 4,
appx B) and sealing compound (item 5, appx B) to threads
of two screws. Position shim(s), night sight cover actuator
handle/support and install two washers and screws.
(k) Close and secure gunners hatch cover per
TM 9-2350-252-10-2 (for M2, M3, M2A1, and M3A1
only) or TM 9-2350-282-10-2 (for M2A2 and M3A2
b. 8635466 Infinity Sight (fig. 3-52).
Infinity sights 8635466 are identified as early
and late production models. The procedures for
purging and charging apply to later production
Figure 3-52 8635466 Infinity Sight