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Figure 3-17. Belt set, removal points.
Figure 3-18. Air shroud, flywheel starting pulley assembly, and cylinder head, exploded view.

TM-5-4310-227-15 Compressor Reciprocating: Air; Gasoline Engine 15 CFM 175 PSI; Receiver Mounted (Champion Pneumatic Model OEG-458-ENG-1) Manual
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TM 5-4310-227-15
ENGINE COOLING AND EXHAUST SYSTEMS
Section VIII.
secure the backet (27) to the air
3-53. General
shroud (12).
The engine is forced-air-cooled from a blow-
(f) Remove the two capscrews (25, fig.
er integrated with the flywheel. An air shroud
3-18) that secure the inside rear
incloses the top and three sides of the engine
of the air shroud (22) to the front
cylinder with an intake opening at the blower.
of the cylinder and crankcase as-
Air from the blower is forced around and over
sembly (17).
the top of the engine to dissipate the heat. The
(g) Remove the four screws (35, fig.
exhaust system, which is composed of a muffler
2-8) and lockwashers (34) that se-
and fittings, provides a means of releasing the
cure the air shroud (36) to the rear
exhaust gases to the atmosphere. Refer to TM
and sides of the cylinder and crank-
5-2805-203-14 for data applicable to Model
case assembly (19 ) and remove the
OEG-458-ENG-3.
air shroud.
(h) Remove the four sheet spring nuts
3-54. Air Shroud, Cover, Rim, and Screen
(1, fig. 3-12) from the f ront of the
air shroud (4).
a. Removal.
(i) Remove the screw (21, fig. 3-2),
(1) Air shroud cover.
l o c k w a s h e r , and nut that secure
(a) Remove the ignition cable (para 3-
the air cleaner bracket clip (20) to
45).
the air shroud (22). Remove the
(b) Remove the nut (3, fig. 2-8) and
bracket clip.
lockwasher (5) that secure the air
b. Cleaning, Inspection, and Repair.
shroud cover (2) to the cylinder
(1) Clean the air shroud, cover, rim and
head stud (4).
screen with an approved cleaning sol-
(c) Loosen the screw (9, fig. 3-2) that
vent and dry thoroughly.
secures the air shroud cover (7) and
(2) Inspect all applicable parts for dents,
shroud (22 ) to the side of the cylin-
cracks, breaks, and other damage.
der head (6) and remove the cover
(3) Inspect all threaded parts for dam-
and stud spacer from the engine
aged threads.
cylinder head.
(4) Repair or replace all defective parts
(2) Rim and screen.
as necessary.
(a) Remove the starting pulley (para 3-
c. Installation.
64).
(1) Air shroud.
(b) Remove the four screws (2, fig. 3-
(a) Secure the air cleaner bracket dip
1 1 ) that secure the rim (5) and
(21, fig. 3-18) to the air shroud
screen (6) to the air shroud (1).
( 2 2 ) with the screw (19),lock-
Remove the rim and screen.
washer (31), and nut (30).
(3) Air shroud.
(b) Position the four sheet  spring nuts
(a) Remove the engine flywheel (para
(23) on the air shroud.
3-55).
(c) Position the air shroud on the cyl-
(b) Remove the intake manifold (para
inder and crankcase assembly (17)
3-67).
and install the four screws (32)
(c) Remove the air shroud cover (see
and lockwashers (31) that secure
(1) above).
the air shroud to the rear and sides
of the cylinder and crankcase as-
(d) Remove the screws (3, fig. 3-16)
sembly.
that secure the starter guard to the
air shroud.
(d) Install the two capscrews (25) and
lockwashrs (24) that secure the in-
(e) R e m o v e the screws (26, fig. 3-
side rear of the air shroud to the
1 4 ) , lockwashers, and nuts that
3-45






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