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 TM 55-1905-242-14
UNIT MAINTENANCE
FOR LANDING CRAFT, MECHANIZED (LCM-8) (ALL VESSELS WITH MOD 2 APPLICATION)
VENTILATION FANS, REPLACE
INITIAL SETUP:
Tools and Special Tools:
References:
Tool Kit, Mechanic's Rail and Marine
FM 55-502
(Item 1, Table 1, WP 0230 00)
TM 55-1905-242-24P (WP 0062)
Multimeter (Item 2, Table 1, WP 0230 00)
Equipment Condition:
Personnel Required:
Ventilation circuit breaker set to OFF, locked out, and
Two Watercraft Engineers, 88L
tagged out IAW FM 55-502
REMOVAL--ENGINE ROOM VENTILATION FAN
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.
NOTE
The engine room ventilation fans are located in the engine room exhaust ventilation
enclosure. The engine room exhaust ventilation enclosure is located just starboard of
the engine room hatch.
1.
Set to OFF the ENG RM VENT FAN NO. 1 and ENG RM VENT FAN NO. 2 circuit breakers and lock out and tag out the
breakers in accordance with FM 55-502.
2.
Set the multimeter to the Vdc (Volts direct current) setting. Place one multimeter lead on each terminal of the engine room
ventilation fan motor (1). If no voltage is noted, proceed to the next step. If voltage is noted, ensure that the circuit
breaker is properly secured.
3.
Label and disconnect the wiring from the engine room ventilation fan motor (1).
4.
Remove the bolts (2) that secure the vent hood (3) to the vent duct (4). Remove the vent hood.
5.
Ensure that the exhaust fire flap (5) is in the OPEN position (6).
6.
Remove the bolts (7) and nuts (8) that secure the engine room ventilation fan (9) to its mount (10).
7.
Remove the engine room ventilation fan (9) through the opening in the top of the vent duct (4).
0139 00-1
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