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TM-9-2815-220-24 Maintenance Manual for AVDS-1790-2CA AVDS-1790-DA and AVDS-1790-2DR Engines Download

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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). H G F D C E F B A A WP 0004 00-11