ARMY TM 9-6115-672-14
AIR FORCE TO 35C2-3-444-32
MARINE CORPS TM 09244A/09245A-14
The oil pan is a reservoir for engine lubricating oil. The dipstick indicates oil level in the pan. The oil level
can be checked during engine operation. One side of the dipstick is used for checking oil level while the
engine is running and the other side is used while the engine is shut down. The pump draws oil from the oil
pan through a screen which removes large impurities. The oil then passes through tubes in the oil cooler.
Engine coolant from the engine cooling system is circulated around the tubes to cool the oil. From the cooler,
oil passes through a spin-on type filter where small impurities are removed. From the filter, oil is distributed
to the engine and turbocharger moving parts and then returns to the oil pan. The oil pressure sender located in
the engine block senses oil pressure. Oil pressure is displayed on the CIM display screen OIL PRESSURE
indicator. An Army Oil Analysis Program (AOAP) sample valve located in the block allows oil samples to be
taken while the engine is operating. The DCS automatically shuts off the engine if oil pressure drops below 15
3 psi (103.4
Engine Air Intake and Exhaust System.
The Engine Air Intake and Exhaust System (Figure 1-26) consists of an air cleaner assembly, intake manifold,
ether supply tank, ether solenoid valve, ETHER START switch, exhaust manifold, turbocharger, muffler, and
crankcase breather filter. The air cleaner assembly includes a dust collector, filter element, restriction
indicator, and dust evacuator valve.
Air is drawn into the dust collector and passes through the filter element. Airborne dirt is removed and
trapped in the dust collector and filter element. Some dust can be removed from the dust collector by pinching
the evacuator valve. The restriction indicator indicates when the filter should be serviced. Filtered air is
drawn out of the filter through air intake tubes into the turbocharger where it is compressed and forced into the
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.
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.
An ether supply system is provided to improve engine starting when outside ambient air temperature is below
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.
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