Page 30 - ConveyorBeltMaintenanceManual2010

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INSTALLATION, MAINTENANCE & TROUBLESHOOTING GUIDE
T R O U B L E S H O O T I N G
PROBLEM: Excessive top cover wear, uniform around the belt
CAUSE: Dirty, stuck, or misaligned return rolls
SOLUTIONS: Remove accumulation; install cleaning devices; use self-cleaning return rolls; improve maintenance and
lubrication
CAUSE: Cover quality too low
SOLUTIONS: Replace with a belt of heavier-cover gauge or higher-quality rubber
CAUSE: Material spillage or buildup
SOLUTIONS: Improve loading and transfer conditions; install cleaning devices; improve maintenance
CAUSE: Off-center loading or poor loading
SOLUTIONS: Adjust the chute to place the load on the center of the belt; discharge material in the direction of belt travel
at or near the belt speed
CAUSE: Excessive sag between idlers causing the load to work and shuffle on the belt as it passes over idlers
SOLUTIONS: Increase tension if unnecessarily low; reduce idler spacing
PROBLEM: Severe pulley cover wear
CAUSE: Sticking idlers
SOLUTIONS: Free idlers; improve maintenance and lubrication
CAUSE: Slippage on the drive pulley
SOLUTIONS: Increase tension through screw take-up or add counterweight; lag the drive pulley; increase arc of contact
CAUSE: Material spillage and buildup
SOLUTIONS: Improve loading and transfer conditions; install cleaning devices; improve maintenance
CAUSE: Material trapped between the belt and pulley
SOLUTIONS: Install plows or scraper on return run ahead of tail pulley
CAUSE: Bolts heads protruding above lagging
SOLUTIONS: Tighten bolts; replace lagging; use vulcanized on lagging
CAUSE: Excessive forward tilt of trough rolls
SOLUTIONS: Reduce forward tilt of idlers no more than 2 degrees from vertical
PROBLEM: Longitudinal grooving or cracking of bottom cover
CAUSE: Sticking idlers
SOLUTIONS: Free idlers and improve maintenance and lubrication
CAUSE: Slippage on the drive pulley
SOLUTIONS: Increase tension through screw take-up or add counterweight; lag the drive pulley; increase arc of contact