Ballast System Operation.

TM 55-1915-200-10

When the ambient temperature reaches 2120F, the

b. Close all valves in ballast piping system. Pump

valve opens and discharges Halon.

is shut down (not running) (FIGURE 2-144).

2-5.10. Ballast System Operation.

c. Open ballast tank(s) suction/discharge valve(s)

(15, 16, 17, 20, or 21) as desired.

2-5.10.1. Ballast Ship Operation.

d. Open ballast main suction valve (2).

a. Depress stop switch (74, FIGURE 2-103, Sheet

4 of 7).

e. Open gauge cutout valve (5).

b. Close all valves in the ballast piping system.

Pump is shut down (not running) (FIGURE 2-144).

f. Open pump discharge valve (7).

c. Open suction/discharge valves (15, 16, 17, 22,

g. Open overboard discharge valve (12).

or 25) to ballast tanks to be filled.

h. Depress start switch (75, FIGURE 2-103, Sheet

d. Open sea chest cutout valve (20 or 21) as

4 of 7) and start pump (4, FIGURE 2-144).

needed.

NOTE

e. Open pump suction valve (8).

Observe discharge pressure gauge

(6, FIGURE 2-144). If no discharge

f. Open gauge cutout valve (5).

pressure is indicated within 10

seconds, depress stop switch. Refer

g. Open discharge valve (32) to ballast main.

to unit maintenance.

h. Depress start switch (75, FIGURE 2-103, Sheet

i. Observe pressure gauge (6). When no pressure

4 of 7) and start ballast pump (4, FIGURE 2-144).

is observed, depress stop switch (74, FIGURE 2-103)

when desired liquid level is acquired or tank(s) is empty.

NOTE

j. Close all valves in ballast piping system

Observe pressure gauge (6, FIGURE

(FIGURE 2-144).

2-144). If no discharge pressure is

indicated within 10 seconds, depress

2-5.10.3. Pump Bilges Operation.

stop switch.

Refer to unit

maintenance.

a. Depress stop switch (74, FIGURE 2-103, Sheet

4 of 7).

i. Depress stop switch (74, FIGURE 2-103, Sheet

4 of 7) when desired tank(s) level is acquired or when

b. Close all valves in the ballast piping section.

tank(s) is full.

Pump is shut down (not running) (FIGURE 2-144).

j. Close all valves in the ballast piping system

c. Open bilge suction valve (1).

(FIGURE 2-144).

d. Open gauge cutout valve (5).

2-5.10.2. Deballast Ship Operation.

a. Depress stop switch (71, FIGURE 2-103, Sheet

4 of 7).

2-414