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 TM 55-1905-242-14
DIRECT SUPPORT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
AIR CONDITIONING COOLING UNITS, REPLACE
INITIAL SETUP:
Tools and Special Tools:
Personnel Required:
Tool Kit, Mechanic's Rail and Marine (Item 1,
Two Watercraft Engineers, 88L
Table 1, WP 0230 00)
Materials/Parts:
Tool Kit, Service Refrigeration (Item 8, Table 1,
Monochlorodifluorum (Refrigerant) (R-22) (Item 27,
Recovery Unit (Item 9, Table 1, WP 0230 00)
Table 2, WP 0230 00)
Multimeter (Item 2, Table 1, WP 0230 00)
Goggles, Industrial, No Vents (Item 4, Table 2,
Equipment Condition:
References:
A/C SEA WTR COOLING PUMP circuit breaker
set to OFF, locked out, and tagged out IAW
FM 55-502
FM 55-502
TM 55-1905-242-24P (WP 0060)
Circuit breaker for appropriate cooling unit set
to OFF, locked out, and tagged out IAW
FM 55-502
Deck plate removed in pilothouse
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.
Goggles should always be worn when working with refrigerant. Failure to wear goggles
when working with refrigerant may result in serious injury or death to personnel.
1.
Don protective goggles and connect the recovery unit to the service valves (1) for the appropriate condensing unit and
evacuate the system.
2.
To remove the pilothouse cooling unit:
a.
Remove the center and starboard access panels under the pilothouse console.
b.
Remove the screws (2) that secure the electrical box cover (3). Remove the cover.
c.
Set the multimeter to the Vac (Volts alternating current) setting. Locate the terminal block to which the wiring (4) is
connected and use the multimeter to check for voltage. If no voltage is noted, proceed to the next step. If voltage
is noted, ensure that the circuit breaker is properly secured.
d.
Label and disconnect the wiring (4) from the cooling unit.
0168 00-1
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