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 TM 9-2815-220-24
THEORY OF OPERATION
0004 00
ENGINE COMPONENTS (Continued)
Cooling Fans and Drive:
The top of the engine is shrouded to house two cooling fans which draw cool air from the
underside of the engine through the cylinder fins and discharge the hot air vertically from the
top shroud. The fans (A) are attached to adapters (hubs) (B) and are mounted on shafts which
are driven through a fan drive clutch assembly (C). The rear fan clutch is driven by the rear
fan driveshaft (D), drive bevel gear shaft (E), and driven bevel gear shaft (F). The front fan
clutch is driven by the front fan driveshaft (G), drive bevel gear shaft (H), and another driven
bevel gear shaft (F).
A
B
A
F
C
E
D
F
G
H
WP 0004 00-11
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