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Sprinter II 2007-2018 3.0L V6
Sprinter III 2019-2022 3.0L V6
This is the identical OEM pulley sold at a franchise Dodge, Freightliner or Mercedes dealer. Fits all Valeo alternators - 180 and 220 Amp.
If you have had problems with snapped serpentine belts or a broken belt
tensioner arm or roller, this declutching pulley has most likely
failed. When operating correctly, this unit has a one-way clutch to
minimize belt flutter and therefore, stress. Over time, this pulley will seize, thereby
losing its one-way decoupling action.
To check the integrity of your
alternator pulley, simply remove the belt and place a screwdriver into
the front of the alternator cooling fan to stop the armature from
rotating. Then turn the pulley by hand. If it moves one direction but,
not the other, it is functional. If it will not rotate at all, it has
failed.
Video demonstration of why this device is a critical component: http://www.youtube.com/watch?v=4EXYP1CmL9Q
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