Steering System Shutdown.

TM 55-1915-200-10

(3) Set helm amidships.

(2) Open gear expansion tank outlet valve (7)

to bow thruster.

(4) Turn selector switch (42) to Autopilot

position.

c. Turn on compartment supply air by pressing

START button (5, FIGURE 2-137, Sheet 1 of 2) on

BOW THRUSTER COMPARTMENT VENTILATION

(5) Turn control amplifier (62) to AUTO

SYSTEM Controller.

position.

d. Align cooling water system piping (FIGURE 2-

(6) Monitor vessel heading

ensure

138).

autopilot is keeping vessel on course.

(1) Open cooling water expansion

tank

2-5.7.3. Steering System Shutdown.

discharge valve (4) to bow thruster engine.

a. Place Selector switch (42, FIGURE 2-135) to

(2) Open cooling water outlet valve (8) from

the OFF position.

keel cooler.

b. Place Pump Selector switch (41, Sheet 3 of 4)

(3) Open cooling water inlet valve (7) to keel

to the OFF position.

cooler.

c. Place #1 and #2 Steering Hydraulic Pump Motor

e. Align bow thruster fuel oil system piping

Controller Selector switches (3, FIGURE 2-133) to the

(FIGURE 2-139).

OFF position.

2-5.8. Bow Thruster Operation.

(1) Open fuel oil day tank outlet valve

NOTE

(2) Open inline stop valve (7).

The bow thruster engine may be

NOTE

started

the

bow

thruster

compartment or at the engine room

Two fuel oil filters are installed.

console (ERC) after Before Starting

Operate with one and use second

Procedures are accomplished. The

filter as a backup.

bow thruster is operated at the

pilothouse console (PHC) primarily

(3) Open fuel oil filter inlet valve (9) or (14).

and can be operated at the ERC,

utilizing voice communications for

(4) Open fuel oil filter outlet valve (11) or

pilothouse commands.

(12).

2-5.8.1. Before-Starting Procedure.

(5) Flood bow thruster fuel system by

a. Check bow thruster lubricating oil day tank level.

manually pumping hand operated priming pump (16).

Level in sight glass (3, FIGURE 2-136) should be full.

2-5.8.2. Bow Thruster Starting at ERC.

b. Align bow thruster lubricating system piping.

a. Ensure BOW THRUSTER control lever (28,

FIGURE 2-106, Sheet 5 of 12) is in NEUTRAL position.

(1) Open gear expansion tank inlet valve (1)

from bow thruster.

2-398