How to Tell when an Idler or Tensioner Pulley Needs to be …
If it does, the cause is a lack of grease in the bearing, a sign it will fail soon. Seized Bearings – An indication that the pulley will lock up. Discoloration – This can be caused by intermittent seizure of the pulley bearing or a bad tensioner, causing belt slip. Surface Build Up – A key indication of a worn out tensioner causing belt slip.
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