ARMY TM 9-61155-644-24
AIR FORCE TO 35C2-3-446-12
MARINE CORPS TM 09249A/09246A-24/2
1-12-9-2 The governor actuator is a linear electromechanical actuator which controls the output of the fuel injection pump
in response to the electrical input from the electronic governor control. The FREQUENCY adjust potentiometer, located
on the control panel and adjusted by the operator, provides a signal representing the desired engine speed/generator fre-
quency to the electronic governor control. A signal representative of the actual engine speed/generator frequency is sent
to the electronic governor control by the magnetic pickup. Any change in engine speed from that selected by the operator,
as sensed by the magnetic pickup, causes the electronic governor control to increase or decrease the fuel injection pump
output to maintain the desired speed. The load measuring unit senses changes in external load demand and provides a
change signal to the electronic governor control allowing the control to start its response prior to any actual change in en-
gine speed. The generator set frequency and power output are indicated by the FREQUENCY meter (HERTZ) and the
kilowattmeter (PERCENT POWER) on the control panel. The FREQUENCY SELECT switch is used to set the generator
for 50 hertz or 60 hertz operating frequencies (MEP-805A).
1-12-9-3 The electronic governor control also contains the engine overspeed switch (Fault System) and the crank dis-
connect switch (Engine Starting System). These switches function as a result of input from the magnetic pickup.
1-12-9-4 Twenty-four VDC power is supplied to the electronic governor control through the governor control power relay.
The governor control power relay is controlled by the fault system. The electronic governor controls of two generator sets
operating in parallel are interconnected by the paralleling cable.
1-12-10 Voltage Regulation System. The Voltage Regulation System (FIGURE 1-11) consists of the voltage regulator,
VOLTAGE adjust potentiometer and power transformer. The voltage regulator senses and controls the generator output
voltage which is operator adjustable within the design limits by use of the VOLTAGE adjust potentionmeter. The power trans-
former provides operating power to the voltage regulator. The output voltage is indicated by the AC voltmeter (VOLTS AC)
on the control panel.
1-13LOCATION AND DESCRIPTION OF MAJOR COMPONENTS.
NOTE
All locations (FIGURE 1-12) referenced herein are given facing the control box side
(rear) of the generator set.
1-13-1 Malfunction Indicator Panel (1). The malfunction indicator panel is located to the left of the control panel assem-
bly. It indicates malfunctions of the generator set components.
1-13-2 Control Panel Assembly (2). The generator set control panel is located at the rear of the generator set and con-
tains controls and instruments for operating the engine and the generator.
1-13-3 Muffler (3). The muffler and exhaust tubing are connected to the turbocharger on the engine. The exhaust exits
from the top of the generator set housing. Gases are exhausted upward.
1-13-4 NATO S LAVE RECEPTACLE (4). The NATO SLAVE RECEPTACLE is located on the right side (front) of the
generator set. It is a NATO receptacle used for remote battery connection.
1-13-5 Fan Belt (5). The fan belt is located in the engine compartment on the front of the engine. The belt drives the
fan, water pump, and the battery charging alternator.
1-13-6 Battery Charging Alternator (6). The battery charging alternator is located on the right side of the engine. It is
capable of maintaining the batteries in a state of full charge in addition to providing the required 24 VDC control power.
1-13-7 Oil Filter (7). The oil filter is located in the engine compartment on the right side. The filter removes impurities
from the engine lube oil.
1-13-8 Dipstick (8).
The dipstick is located in the engine compartment on the right side. The dipstick shows the lube
oil level in the engine crankcase.
1-26
