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The Freightliner Accessory Drive Belt transfers rotational motion from the engine crankshaft to multiple front-end accessories. As the engine turns, the belt travels along routed pulleys, allowing driven components to operate in sync with engine speed. This motion continues across varying operating conditions as the belt flexes to follow pulley paths. The belt functions as a mechanical link rather than an electronic or hydraulic control element. Its activity supports coordinated accessory movement whenever the engine is running. Additionally, the Freightliner 01-35643-671 enables consistent power transfer across the accessory drive system.
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