Technical

Topic : Conveyor belt trouble shooting

Problem	Most likely cause	Likely cause
Belt runs to one side	Build-up on idlers	Sticking idlers
Section runs to one side	Join not square	Bowed belt
Belt runs to one side	Install training idlers	Off centre loading
Runs off at tail pulley	Install training idlers	Material spillage
Runs off at head pulley	Worn lagging	Material spillage
Belt slip	Insufficient traction	Worn lagging
Belt slip on starting	Insufficient traction	Counterweight too light
Excessive stretch	Improper installation	Counterweight in wrong position
Stripping of top cover	Incorrect skirt boards	Spanking due to load impact
Excessive top cover wear	Misaligned return rolls	Cover quality too low
Excessive pulley cover wear	Sticking idlers	Slippage on drive pulley
Grooving of bottom cover	Sticking idlers	Material spillage
Covers harden / crack	Heat or chemical damage	Improper storage / handling
Cover swells in spots	Oil or grease contamination	–
Belt failure at fasteners	Fastener plate too long	Wrong fastener type
Splice separation	Improper splice	Pulleys too small
Excessive edge wear	Off centre loading	Material spillage
Transverse breaks at edge	Edges folding on structure	Improper transition from trough
Short breaks in carcass	Impact of material on belt	Material between belt & pulley
Ply separation	Insufficient transverse stiffness	Pulleys too small
Carcass fatigue at idler junction	Improper transition from trough	Severe convex vertical curve
Cover blisters, sand blisters	Fine cuts in covers	Oil or grease contamination
Belt cupping – new belt	Excessive cover gauge ratio	–
Belt cupping – old belt	Oil or grease contamination	Heat or chemical damage