TM 55-1905-223-24-14
REPLACEMENT
CAUTION
The next step requires two soldiers because of the weight (26.5 pounds) of the power
converter.
a. Position replacement power converter (FIGURE 2-18) on bulkhead, aligning mounting holes on unit to bulkhead
mounting holes, and secure with three mounting bolts (2).
b. Remove cover (1) by removing fourteen hex head screws (5), lockwashers (4), and flat washers (3).
c.
Assemble two stuffing tubes (7) to unit and cables (8, 9, and 10).
d. Route cables (8, 9, and 10) into unit through stuffing tubes (7) and connect to terminal board (11) TB1 and
remove tags. Secure stuffing tubes (7).
e. Replace cover (1) and secure with fourteen flat washers (3), lockwashers (4), and hex head screws (5).
f.
On pilothouse IC/ELEX panel, set circuit breaker No. 1 (MK 27 GYRO PWR CONV UNIT) to ON. Remove "Out
of Service, Do Not Operate" tag. POWER lamp (6) should light red.
g. On pilothouse dc panel, set circuit breaker No. 1F (GYRO PWR TRANSF UNIT) to ON. Remove "Out of
Service, Do Not Operate" tag.
h. Start compass (TM 55-1905-223-10).
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