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 TM 55-1905-220-14-2
2-99. DRAINING BALLAST TANKS - USING THE FIRE PUMP (Cont).
(f) Eductor suction vacuum gage I(13), should read approximately 28 Hg (inches of water).
(g) Rotate valve (14) counter-clockwise.
(h) Eductor supply gage (15) should read 90 psi (620.5 k Pa)
CAUTION
To prevent back-flooding, do not open flow control valve (4) until vacuum gage (14) indicates a
vacuum in educator suction line.
(i) Place flow control valve (4) lever in the on position.
b. To stop the fire pump and eductor draining of the ballast tanks proceed as follows:
(1) Aft Engine Room.
(a) Rotate the suction valve (9) clockwise.
(b) Press the STOP switch on the fire pump controller.
(c) Place flow control valve (4) lever in the off position.
(d) Rotate the overboard discharge valve (7) clockwise.
(e) Place the (red) check valve (6) lever in the on position.
(f) Place flow control valve (1) lever in the on position.
Change 4
2-557
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