Page 33 - ConveyorBeltMaintenanceManual2010

SEO Version

31
INSTALLATION, MAINTENANCE & TROUBLESHOOTING GUIDE
T R O U B L E S H O O T I N G
PROBLEM: Ply separation
CAUSE:
Insufficient transverse stiffness
SOLUTIONS:
Replace with the proper belt
CAUSE:
Pulleys too small
SOLUTIONS:
Use larger-diameter pulleys
CAUSE:
Heat or chemical damage
SOLUTIONS:
Use the belt designed for specific condition
PROBLEM: Carcass fatigue at idler junction
CAUSE:
Improper transition between troughed belt and terminal pulleys
SOLUTIONS:
Adjust transition in accordance with Goodyear Engineered Products’ “Handbook of Belting”
CAUSE:
Severe convex (hump) vertical curve
SOLUTIONS:
Decrease idler spacing in curve; increase curve radius
CAUSE:
Excessive forward tilt of troughed rolls
SOLUTIONS:
Reduce forward tilt of idlers to no more than 2 degrees from vertical
CAUSE:
Excessive gap between idler rolls
SOLUTIONS:
Replace idlers; replace with heavier belt
CAUSE:
Insufficient transverse stiffness
SOLUTIONS:
Replace with the proper belt
CAUSE:
Excess gap between idlers, causing load to work and shuffle on the belt as it passes over idlers
SOLUTIONS:
Increase tension if unnecessarily low; reduce idler spacing
PROBLEM: Cover blisters or sandblisters
CAUSE:
Cover cuts or very small cover punctures allow fines to work under the cover and propagate between the
cover and carcass
SOLUTIONS:
Make a vulcanized spot repair or a self-curing repair
CAUSE:
Spilled oil or grease, over lubrication of idlers; improve housekeeping; reduce quantity of grease used; check
grease seals
SOLUTIONS:
Decrease idler spacing in curve; increase curve radius