ARMY TM 9-6115-645-24
AIR FORCE TO 35C2-3-444-12
MARINE CORPS TM 09244A/09245A-24/2
1-12.5 Engine Lubrication System.
1-12.5.1 The Engine Lubrication System (FIGURE 1-6) consists of an oil pan, dipstick, pump, oil cooler, oil sample valve,
oil pressure sender, OIL PRESSURE indicator, low oil pressure switch and filter.
1-12.5.2 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. 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 shutdown. The pump draws
oil from the oil pan through a screen removing large impurities. The oil than 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. The
oil pressure is displayed on the 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 low oil pressure switch, also located in the
engine block, functions with the generator set fault system. The engine is automatically shut off if the oil pressure drops
below 15 ± 3 psi (103.4 ± 20.7 kPa).
1-12.6 Engine Air Intake and Exhaust System
1-12.6.1 The Engine Air Intake and Exhaust System (FIGURE 1-7) consists of an air cleaner assembly, intake manifold,
ether supply tank, ether solenoid valve, ETHER 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.
1-12.6.2 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.
1-12.6.3 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 turbo-
charger are channeled into the muffler that deadens the sound of the exhaust gases. The 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 pres-
sure 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.
1-12.6.4 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.
1-12.6.5 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 MASTER SWITCH to START and holding the ETHER
switch in the ON position.
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