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 TM 55-1905-242-14
UNIT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
GENERAL ALARM SYSTEM, REPAIR
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 0040)
GEN ALARM circuit breaker set to OFF, locked
out and tagged out IAW FM 55-502
REPAIR
Repair of the general alarm system is accomplished by replacement of its components. Procedures to accomplish this
replacement are below.
CONTACTOR SWITCH ASSEMBLY REPLACEMENT
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.
Loosen and remove the four screws (1) that secure the contactor switch cover (2) in place.
2.
Remove the contactor switch cover (2) and turn it over to reveal the internal electrical components of the contactor
switch (3).
3.
Set the multimeter to the Vdc (Volts direct current) setting and check for voltage at the connection points of the terminals
(4) to ground. If no voltage is noted, proceed to the next step. If voltage is noted, ensure that the affected circuit breaker
is properly secured.
4.
Label and remove the electrical wiring from the terminals (4) on the contactor switch (3).
5.
Loosen and remove the four screws (5) that secure the contactor switch assembly, and remove it from the mounting
bracket.
0106 00-1
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