Trouble Shooting Unusual Noise / Excessive Noise Flange Failure Tension Loss / Ratcheting Unusual Pulley Wear Excessive Belt Edge Wear Belt Tracking Tensile Break Excessive Temperature of Belt, Bearings, Housing, Shafts, Etc. Belt Cracking Shafts Out of Sync Premature Tooth Wear Vibration Tooth Shear Bearing Failure   UNUSUAL NOISE / EXCESSIVE NOISE: Click to open for answer / Double click to close: Misaligned Drive Check Parallel and Angular Alignment of the Pulleys Too Low or High Tension Adjust Tension to Recommended Value Backside Idler Use Inside Idler Density of Pulley Material Change Pulley Material Worn Pulley Replace Belt Worn Belt Replace Belt Bent Guide Flange Reinstall, Replace, Repair Flange Belt Speed too High Redesign Drive Incorrect Belt Profile for Pulley Check Belt / Pulley Compatibility Use of Polyurethane (Plastic) Belt Noise Level is Reduced with the use of Rubber Timing Belt Subminimal pulley diameter Use Correct Pulley Diameter Excessive Load on Bearings Check Parallel and Angular Alignment of the Pulleys Adjust Tension to Recommended Value Check Horsepower Rating Eliminate or Control Condition Acoustics of Drive Enclosure Eliminate or Control Condition Excessive load Check Horsepower Rating Redesign Drive TENSION LOSS / RATCHETING: Click to open for answer / Double click to close: Weak Support Structure or Mounts Redesign Drive Reinforce Structure Center to Center Distance Fluctuates Redesign Drive Excessive Pulley Wear Replace Pulley Change Pulley Material Fixed (Non-Adjustable) Centers Use Inside Idler Excessive Debris Eliminate or Control Condition Clean and Protect Drive Excessive Load Check Horsepower Rating Redesign Drive Subminimal Pulley Diameter Use Correct Pulley Diameter Excessive Low or High Temperature (-30F to 185F) Eliminate or Control Condition Clean and Protect Drive Reduce ambient drive temperature to 185°F maximum Exposure to Oil, Solvents, Harsh Chemicals Eliminate or Control Condition Clean and Protect Drive Belt, Pulley or Shafts Running too Hot Check for conductive heat transfer from prime mover Unusual Belt Degradation Reduce ambient drive temperature to 185°F maximum EXCESSIVE BELT EDGE WEAR: Click to open for answer / Double click to close: Damage Due to Handling Follow Proper Handling and Storage Procedure Flange Damage Reinstall, Replace, Repair Flange Belt too Wide Use Proper Width Pulley Belt Tension too Low Adjust Tension to Recommended Value Rough Flange Surface Finish Reinstall, Replace, Repair Flange