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 TM 55-1905-242-14
0139 00
REMOVAL--BATTERY COMPARTMENT VENTILATION FAN
WARNING
Charging and discharging batteries produce explosive hydrogen gas. Do not allow
smoking, sparks, or open flame in the vicinity of the battery compartment. When the
battery compartment ventilation fan is inoperative, dangerous levels of hydrogen gas
can be found in the battery compartment if the batteries are charged or discharged.
Ensure that the batteries are neither charged nor discharged when the battery compart-
ment fan is inoperative. Failure to comply could result in damage to equipment and
serious injury or death to personnel.
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.
Set to OFF, lock out, and tag out the PORT BATTERY ISOL SWITCH and the STBD BATTERY ISOL SWITCH in
accordance with FM 55-502.
2.
Open the battery compartment hatch and all of the accommodation module hatches in order to allow air circulation to the
battery compartment.
3.
Remove the screws (11) that secure the junction box cover (12) to the junction box (13). Remove the junction box
cover.
4.
Set the multimeter to the Vdc (Volts direct current) setting. Place one multimeter lead on each of the terminals inside the
junction box (13). If no voltage is noted, proceed to the next step. If voltage is noted, ensure that the battery isolation
switches are properly secured.
5.
Label and disconnect the wiring from the terminals inside the junction box (13).
6.
Remove the bolts (14), nuts (15), and washers (16) that secure the inlet flange (17) to the battery compartment ventilation
fan (18).
7.
Remove the bolts (19), nuts (20), and washers (21) that secure the outlet flange (22) to the battery compartment ventila-
tion fan (18).
8.
Remove the bolts (23), nuts (24), and washers (25) that secure the battery compartment ventilation fan (18) to its mount
and remove the battery compartment ventilation fan.
0139 00-3
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