Belt tensioner
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+ | [[Image:Belt-tensioner 1.jpg.JPG|thumb|400px|Ford 302 Belt tensioner]] | ||
+ | [[Image:Belt tensioner 2.jpg.JPG|thumb|400px|Ford 302 Belt tensioner]] | ||
A '''belt tensioner''' is used to create a generally constant tension on a [[belt]] as it changes in length due to normal wear, or due to changes in span lengths due to span speed differences, wherein the belt is driven by a single drive pulley from the output shaft of the engine and wherein the belt rotates driven pulleys, each operating an automotive accessory. | A '''belt tensioner''' is used to create a generally constant tension on a [[belt]] as it changes in length due to normal wear, or due to changes in span lengths due to span speed differences, wherein the belt is driven by a single drive pulley from the output shaft of the engine and wherein the belt rotates driven pulleys, each operating an automotive accessory. | ||