Engine Drive Belts
Micro-V® Belt Troubleshooting Guide2. Chunk-Out
Pieces or chunks of rubber material have come off the belt. When chunk-out has occurred, a belt can fail at any moment. Cause Chunk-out can happen when several cracks in one area move parallel to the cord line. Heat, age and stress are the primary contributors. Solution Replace the belt immediately with a Gates Micro-V® XF belt. Gates belts are designed for greater flexibility and heat tolerance in today’s smaller engine compartments.
3. Pilling
Belt material is sheared off from the ribs and builds up in the belt grooves. Cause There are a number of causes, including lack of tension, misalignment, worn pulleys or a combination of these factors. Pilling will occur most frequently in diesel engines, but is not isolated to them. Solution When pilling leads to belt noise or excess belt vibration, the belt should be replaced.
4. Abrasion
Back side of belt appears shiny or glazed. In advanced stages, the fabric becomes exposed. Cause When in motion, the belt makes contact with an object in its path such as a flange or bolt. This may be caused by improper belt tension. Solution Replace the belt and remove the foreign object or, if it can’t be removed, make sure that contact is avoided. Check the belt tensioner and ensure proper belt tension. |
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