Propulsion Control Panel
STRAINER HIGH DP and DISCHARGE
FILTER HIGH DP. They will illuminate and
The propulsion control panel (fig. 6-10) is the
activate an alarm when either the suction strainer
bottom panel of the PCC. This panel has the
or discharge filter are in an alarm condition.
controls and indicators for the propeller hydraulic
The SUPPLY PRESSURE meter monitors the
system, shaft speed and propeller pitch, MRG
CPP hydraulic supply pressure. Associated with
monitoring, and control transfer.
this meter is the indicator labeled OIL PRESS
LOW. If supply oil pressure drops to 40 psig, this
PROPELLER HYDRAULIC SYSTEM SEC-
indicator illuminates and sounds an alarm.
TION. --This section (A) has a meter, eight
indicators, and two control push buttons. They
The next indicator is labeled OIL TEMP
are used to operate the hydraulic system of the
HIGH. It illuminates and sounds an alarm to alert
controllable pitch propeller.
the operator that the oil temperature in the system
Normally, the hydraulic pressure is supplied
has exceeded 160F. Under the label OIL LEVEL
to the system by the pump that is driven by the
LOW is the next split-legend indicator labeled
reduction gear (main pump). When this pump
HUB TANK/SUMP TANK. This indicator
cannot provide the proper pressure, it must be
monitors the oil level of the sump and head tanks.
augmented by the standby motor-driven pump.
If the level in the head tank falls to 35 gallons,
Two control push buttons are used to operate the
the HUB TANK indicator illuminates and sounds
motor-driven pump. The split-legend, push-
an alarm. If the sump tank level drops below 425
button indicator labeled STANDBY/MANUAL
gallons, the SUMP TANK indicator illuminates
is used to select the mode of operation. If the
and sounds an alarm.
standby mode is selected and illuminated, when
the shaft speed drops to about 105 srpm, the
motor-driven pump starts. When the push
ENGINE ORDER TELEGRAPH (EOT)
button is placed in the manual mode, the motor-
SECTION. --Located below the propeller
driven pump must be started by the operator. To
hydraulic section, is the EOT section (B). This is
start the pump, the operator uses the split-legend,
used to relay engine orders from the bridge to the
push-button indicator labeled MANUAL RUN/
PCC. When the bridge orders a change of speed,
MANUAL STOP. When the motor-driven pump
one of the pointers in the EOT will point to the
is running, the indicator labeled MOTOR
requested speed. T h e PCC operator, to
RUNNING illuminates. Both pumps have suction
acknowledge the order, moves the other pointer
strainers in the pump suction lines and discharge
to match the bridge pointer. This is done
filters in the pump discharge lines. These filters
using the knob below the EOT. If the pitch
are monitored by indicators labeled SUCTION
of the propeller and the EOT indicate opposite
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