CHAPTER 4
ENGINEERING SUPPORT SYSTEMS MAINTENANCE
CG-47 class ships, the fuel service system controls and
As a GSE, you will be tasked primarily with the
indicators are located on the propulsion and auxiliary
operation and maintenance of gas turbine engines. You
control console (PACC) and the propulsion local control
also will be tasked with the maintenance and repair of
console (PLCC). On the FFG-7 class ships, the fuel
some of the engineering support systems. In this chapter
service system controls and indicators are located on the
we will describe some of the maintenance you may
perform on various engineering support systems. These
propulsion control console (PCC). On the DDG-51 class
ships, these controls and indicators are located on the
systems include the ship's service fuel system, the bleed
PACC and the shaft control unit (SCU).
air and start air system, the gas turbine fuel system, the
main lube oil system, and the waste heat recovery
The pumps and valves for the fuel service system
system.
are controlled from the control consoles. The control
consoles provide for stopping and starting of the fuel
The engineering support systems are an essential
part of the main propulsion plant. In fact, the plant could
pumps and opening and closing of the tank valves. From
not operate efficiently without these systems. As a GSE,
the control consoles, you can place the pumps in slow
you will be assigned to perform PMS, repair, and
(low), fast (high), or stop. The operation of the fuel
maintenance on the electrical and electronic parts of the
pumps also can be placed in manual or automatic control
from the consoles.
support systems. On DD-, CG-, and DDG-class ships,
your responsibilities will also include the waste heat
COMPONENTS
boiler (WHB) control panel.
Since the engineering support systems will vary
As mentioned earlier, the ship's service fuel system
among ship classes, we will describe these systems in
consists of several parts. In the following sections, we
general terms. The examples you will see in this chapter
will discuss only the parts that are of primary concern
are from various ship classes. Always refer to your
t o the GSE. This discussion will include the
ship's engineering operating procedures (EOP) and
maintenance and repair of the fuel booster pump motors,
engineering operational sequencing system (EOSS) for
fuel booster pump controllers, motor-operated valves,
detailed information on these systems.
and fuel filter/coalescers. Refer to chapter 5 of this
TRAMAN for a detailed discussion of the maintenance
and troubleshooting procedures associated with motors
SHIP'S SERVICE FUEL SYSTEM
and controllers.
The ship's service fuel system is designed to
condition and supply clean fuel to the main engines and
Fuel Booster Pump Motors
the generators. The fuel is delivered at the proper
temperature and pressure for efficient operation of the
The motors for the fuel service system are 3-phase,
engineering plant. A ship's fuel service system usually
60-hertz (Hz), 440-volt ac, fan-cooled motors. These
consists of service tanks, strainers, booster pumps,
two-speed motors are designed for constant-speed and
filter/coalescers, prefilters, and associated piping. As a
continuous-duty operation. On the DDG-51 and FFG-7
G S E , you will mainly be concerned with the
class ships, the fuel pump motors drive the fuel pump
maintenance of the booster pump motors, the booster
through a reduction gear unit. If you are assigned to a
pump controllers, and the filter/coalescers.
DDG-51 or FFG-7 class ship, you will need to check the
oil level in the reduction gear unit periodically.
OPERATION
MAINTENANCE. You will maintain the ship's
The ship's fuel service system on board gas turbine
service fuel booster pump motors the same as you would
s h i p s is normally operated and monitored by the
any other motor. This includes keeping the insulation
engineering control and surveillance system (ECSS),
clean and dry, the electrical connections tight, and the
motor in good mechanical condition. Usually, you will
propulsion control system (PCS), or the machinery
control system (MCS). On the DD-963, DDG-993, and
accomplish maintenance through PMS. Be sure to keep
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