Engine Drive Belts
Micro-V® Belt Troubleshooting Guide5. Damaged Outermost Belt Ribs
Sidewalls of the belt may appear glazed or the edge-cord may become frayed and ribs removed. A noticeable noise may result. In severe cases, the belt can jump off the pulley. Cause Pulley misalignment is a common cause of premature belt failure. Misalignment forces the belt to kink or twist while running, causing premature wear. Solution Replace the belt and make sure to realign the pulleys. Also check that the pulleys, pulley brackets and shafts are not bent or broken.
6. Uneven Rib Wear
Damage to the side of the belt, a possible break in a tensile cord or jagged ribs. A thumping or grinding noise may also be heard. Cause A foreign object – such as a pebble – in the pulley will cause uneven wear and can cut into the belt and break the tensile cords. Solution Replace the belt and inspect the pulley for foreign objects or damage. Replace the pulley if necessary.
7. Gravel Penetration
Small pinholes are visible on the back side of the belt. Bumps may be visible and fabric around the holes can be frayed. Cause Pebble, gravel or sand is wedged between the belt groove(s) and pulley ridge(s). Solution Clean the drive and then replace the belt to avoid tensile cord separation and possible roadside failure. Use Gates Micro-V® XF belts, which are precision ground in the factory for a better pulley fit. |
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