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Volvo Truck Alternator Belt Tensioner Belt Tensioner Volvo Belt Tensioner Volvo FMX Series Belt Tensioner Volvo Truck Lu Belt Tensioner Volvo ALTERNATOR BELT TENSIONER Volvo OE Reference Number: 20935521, 21422765, 20739751, 3979979, 21819687 New / Used New Classification ALTERNATIV Length (cm) 18 Width (cm) 18 Height (cm) 45 A tensioner maintains the correct amount of tension on the belt at all times throughout its duty cycle. It also helps protect other components such as the alternator and water pump from undue stress and premature failure. In addition, a tensioner is a relatively inexpensive part to replace. This website uses the names, models, product types, part numbers, and other product information associated with the brands of original or non-original manufacturers solely for identification purposes. We are not official distributors of the mentioned manufacturers or owners of brand names.
