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 TM 55-1905-242-14
UNIT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
ANTENNA ASSEMBLIES, REPLACE
INITIAL SETUP:
Tools and Special Tools:
Personnel Required:
Tool Kit, Mechanic's Rail and Marine
Two Watercraft Engineers, 88L
(Item 1, Table 1, WP 0230 00)
References:
FM 55-502
Equipment Condition:
TM 55-1905-242-24P (WP 0043)
NAVTEX RECEIVER NX-500 circuit breaker set
to OFF, locked out, and tagged out IAW
FM 55-502
GENERAL
Replacement of the NAVTEX NX-500 antenna is detailed in this procedure. Although the precise configuration of the various
antennas may vary, this procedure applies to all antennas on the vessel.
REMOVAL
WARNING
Replace or repair components only after the affected circuit has been secured, locked
out, and tagged out. Performing replacement with the circuit energized may result in
damaged equipment and serious injury or death to personnel.
1.
Follow the antenna cable (1) to its radio connection, freeing it from the vessel's structure as you progress.
2.
Unscrew the side mounting knobs (2) and remove the NAVTEX NX-500 (3) from its mount (4) to access the antenna cable
(1) connection.
3.
Disconnect the antenna cable (1) from its radio at the back of its unit.
NOTE
Not all antennas utilize an upper mount. If the antenna to be replaced does not utilize an
upper mount, disregard step 4 and proceed to step 5.
4.
While one person holds the antenna (5), remove the nuts (6) that secure the upper bracket clamp (7).
5.
Remove the screws (8) that secure the antenna mount (9) to the vessel's structure. Remove the antenna (5).
0123 00-1
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