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 TM 55-1905-242-14
UNIT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
NAVIGATION LIGHTS, FIXTURES, AND SWITCHES, 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)
Multimeter (Item 2, Table 1, WP 0230 00)
References:
FM 55-502
Equipment Condition:
TM 55-1905-242-24P (WP 0044)
Appropriate circuit breaker(s) set to OFF,
locked out, and tagged out IAW
FM 55-502
REMOVAL--MASTHEAD/SIDE/NOT-UNDER-COMMAND LIGHT FIXTURE
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.
Unlock the locking ring assembly (1) from the base (2).
2.
Lift off the lens housing (3), locking ring assembly (1), and gasket (4).
3.
Remove the bulb (5) from the bulb holder (6).
4.
Set the multimeter to the Vdc (Volts direct current) setting. Place the positive multimeter lead on the center electrode of
the bulb holder (6) and the negative lead on the outer edge of the bulb holder and observe the voltage. If no voltage is
noted, proceed to the next step. If voltage is noted, ensure that the circuit breaker is properly secured.
5.
Remove the two screws (7) that secure the bulb holder (6) to the base (2) and remove the bulb holder (6) from the base.
6.
Label and disconnect the wiring from the bulb holder (6).
7.
Remove the two screws (8) that secure the cable clamp assembly (9) to the base (2) and remove the wiring.
0124 00-1
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