ARMY TM 9-6115-671-14
AIR FORCE TO 35C2-3-446-32
MARINE CORPS TM 09249A/09246A-14A
1-28
1.16.10.3
Engine exhaust gases are expelled into the exhaust manifold and ported to the turbine of the
turbocharger. The turbine drives the turbocharger compressor which compresses the intake air.
Exhaust gases discharged by the turbocharger are channeled into the muffler that deadens the sound of
the exhaust gases. Gases pass from the muffler through the muffler outlet and are vented upward from
the generator set housing. A cover, which is held open by the pressure of the exhaust gases during
operation, closes over the exhaust port to prevent rain, water, or other foreign matter from entering the
exhaust port when the set is not in use. The cover is easily removed for connection of an exhaust pipe
for indoor operation.
1.16.10.4
Combustion gases, which enter the crankcase, are filtered through the crankcase breather filter to
remove oil droplets and are then recycled through the intake manifold.
1.16.10.5
An ether supply system is provided to improve engine starting when outside ambient air temperature is
below 40
F (4
C). The ether system includes an ether supply tank, ether solenoid valve, ETHER
switch, and piping from the solenoid valve to the intake manifold. The ether system is activated by
turning the ENGINE CONTROL switch to START and momentarily holding the ETHER switch in the
ON position while continuing to crank engine.
1.16.10.6
Air in the engine crankcase is drawn out the right side of the engine through a rubber hose and into the
crankcase breather filter assembly. There the air swirls around, leaving oil particles in the removable
filter, and leaves through a second rubber hose. The air then passes through this output hose into the
engine air cleaner assembly output hose. That is, the filtered air from the crankcase enters the engine
intake air flow downstream of the intake air filter. Engine intake air flow is then compressed with the
turbocharger, enabling filtered crankcase air to be recycled into the engine intake air and used in the
combustion process of the engine.
1.16.11
Output Supply System.
1.16.11.1
The Output Supply System (Figure 1-27) consists of the AC generator, ground fault circuit interrupter,
CONVENIENCE RECEPTACLE, current transformer, voltage reconnection terminal board, AC
circuit interrupter, load output terminals, AC CIRCUIT INTERRUPT switch, load sharing
synchronizer, automatic voltage regulator, CIM display screen FREQ gage, VOLTAGE gage, and
POWER gage.
1.16.11.2
Power created by the generator is supplied through the current transformer, voltage reconnection
terminal board, and AC circuit interrupter to the load output terminals. The voltage reconnection
terminal board allows configuration of the generator set for 120/208 volt connections or 240/416 volt
connections. The AC CIRCUIT INTERRUPT switch closes and opens the AC circuit interrupter. This
enables or interrupts power flow between the voltage reconnection terminal board and load output
terminals. The voltage regulation system (paragraph 1.14.4) senses generator output voltage and
provides a control signal to the generator exciter to maintain the desired generator output voltage.
Generator output frequency is controlled by the governor control system (paragraph 1.14.3) and is read
on the CIM display screen FREQ gage (Hz). The current transformer provides a reduced current signal
to the DCS and CIM display screen GEN CURRENT indicators (amps AC). The CIM display
POWER gage (kW) provides an indication of the power being used by the load. The GEN
AMMETER indicates rated current in amps required by the load. The AC circuit interrupter will open
and disconnect the load whenever any of the following faults occur: reverse power, undervoltage,
overload, overspeed, low oil pressure, high water temperature, or short circuit.
1.16.11.3
The AC generator also provides 120 VAC power to the CONVENIENCE RECEPTACLE through the
GROUND FAULT CIRCUIT INTERRUPTER.
