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) Camshaft Timing Gears: The camshaft timing gears are a series of gears and shafts that transfer power from the crankshaft to drive the camshaft in such a way as to ensure the valves operate at the proper time. The accessory drive gear (A) and accessory drive gear shaft assembly (B) drive both camshafts. Individual drive bevel gear shafts (C), camshaft drive gear shafts (D), and camshaft driven gear shafts (E) drive each camshaft through inclined quill-type drive shafts (F). The quill shafts can be removed to permit separate rotation of the camshafts for engine timing. The quill shafts have different number of splines on each end that allows them to be inserted in the camshaft bevel gear shafts when camshafts are correctly positioned in relation to the crankshaft without disturbing the relationship between the camshafts and crankshaft. A Damper Left Bank Camshaft Right Bank Camshaft B C C E F F D D Flywheel E WP 0004 00-9