TM 5-6115-465-S4
TO 35C2-3-446-2
NAVFAC P-8-625-34
TM06858B/06869D-34
SHORT switch to the OFF position.
(7) Return the generator set START-RUN-
STOP switch to the STOP position and the BATTLE
INTAKE AND EXHAUST SYSTEMS AND BREATHER
Section VI.
c. The breather system provides an escape for
GENERAL.
3-43.
gases which accumulate in the engine crankcase dur-
ing engine operation. The gases pass through the
a. The intake system consists of a dry type air
breather which traps oil vapors, and is drawn into
cleaner assembly with a reusable type filter element.
the engine air cleaner housing through the heather
The assembly removes dust and dirt from the engine
tube.
combustion air. It is equipped with a restriction
transducer. The restriction transducer measures
3-44.
AIR CLEANER ASSEMBLY.
vacuum in the air cleaner housing. When the filter
element becomes sufficiently clogged that the vac-
Refer to the Operator and organizational Mainten-
uum bsgins to impair engine performance, the re-
ance Manual for air cleaner assembly maintenance
striction transducer transmits an electrical impulse
to the air cleaner condition indicator on the engine
procedures.
control panel.
3-45. EXHAUST PIPE AND MUFFLER.
Refer to the Operator and Organizational Mainten-
b. The exhaust system consists of a muffler
assembly. The system muffles the noise of engine
procedures.
operation and provides a means of expelling exhaust
3-46. BREATHER AND BREATHER TUBE.
of the muffler assembly is fitted with a rain cap
Refer to the Operator and Organizational Mainten-
which prevents the entry of foreign material when
ance Manual for breather and breather tube removal
the engine is and operating.
procedure.
ENGINE ASSEMBLY
Section VII.
f. The flywheel is made of cast iron. It is mach-
GENERAL.
3-47.
ined to accommodate the coupling disc of the genera-
tor assembly. The flywheel is attached to the crank-
a. The engine assembly is a six cylinder, four
cycle, fuel injected, compression ignition, liquid
shaft by six bolts, one of which is off center. This
cooled diesel engine. The assembly consists of the
permits the flywheel to be installed in only one posi-
cylinder head, rocker arm assembly, timing gears
tion for timing purposes. The flywheel housing
and housing, camshaft, flywheel and flywheel
serves as a cover for the rear of the cylinder block
hawing, main bearings and crankshaft, piston and
and oil par and as a partial enclosure for the fly-
connecting rod assembly, and cylinder block.
wheel. It provides the mounting for the starter as-
sembly and also contains the rear crankshaft seal.
b. The cylinder head is a one piece casting
and is detachable. Valve seats are part of the cast-
g. The crankshaft has seven main bearing journals
ing, but valve guides are removable.
and six connecting rod bearing journals. This arrange
ment places each connecting rod journal between two
C. The rocker arm assembly is mounted on the
main bearing journals. All bearing journals are sur-
cylinder head. It functions to open and close the
face hardened and are drilled for oil passages.
valves.
h. The connecting rods are heavy alloy steel
d. The timing gears determine the sequence of
forgings with precision type bearings for the crank-
value opening and fuel injection. The gears are en-
shaft and bronze bushings for the full floating piston
closed in a housing, the cover of which contains the
pin. The pistons are made of aluminum and are the
front crankcase oil seal.
solid type (no saw slots or splits in the skirt). Each
piston is fitted with five rings. The top three rings
e. The cam shaft actuates the rocker arm as-
are compression type and the fourth ring from the top
sembly which operates the valves. It is driven by a
is an oil control ring. The fifth ring is an oil scraper
gear which meshes with the crankshaft gear.
ring.
3-61
