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 TM 55-1905-242-14
UNIT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
CONTROL CONSOLE, INSTRUMENT LIGHTS AND SWITCHES, REPLACE
INITIAL SETUP:
Personnel Required:
Tools and Special Tools:
Two Watercraft Engineers, 88L
Tool Kit, Mechanic's Rail and Marine (Item 1,
Table 1, WP 0230 00)
References:
Multimeter (Item 2, Table 1, WP 0230 00)
FM 55-502
Equipment Condition:
TM 55-1905-242-24P (WP 0006)
Circuit breaker(s) for affected circuit(s) secured,
locked out and tagged out IAW FM 55-502
GENERAL
This work package describes the replacement of a single pole, single-throw toggle switch. This is the switch style found in
most of the console. The replacement procedure for the other control console and instrument light switches is similar.
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.
Ensure that all of the circuit breakers that serve switches in the affected switch panel are properly locked out and tagged
out in accordance with FM 55-502.
2.
Remove the screws (1) that secure the switch panel (2) to the console.
3.
Set the multimeter to the Vdc (Volts direct current) setting and check that no voltage is present at any switch (5). If no
voltage is noted, proceed to the next step. If voltage is noted, ensure that the affected circuit breaker is properly secured.
4.
Remove the nut (3) and washer (4) that secure the switch (5) to the switch panel (2).
5.
Label and disconnect the wiring from the switch terminals (6).
6.
Remove the switch (5) from the switch panel (2).
0078 00-1
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