| Characteristic |  | Possible problem | | Solution |
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| Conveyor running to one side at a given point on structure | | One or more idlers not rectangular to the longitudinal axis of the belt | | Adjust idlers |
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| | Sticking idlers | | Clean idlers and belt, install belt cleaning |
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| | Conveyor frame or structure not level or crooked | | Level the structure |
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| | Guiding not sufficient | | Tilt idlers and/or install belt guiding |
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| Particular section of the belt runs to one side at all points | | Belt splicing not straight | | Resplice the belt. |
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| | Bowed belt | | A new belt should straighten out after operated under full load tension, use self-aligning idlers on the return strand ahead of the tail pulley if necessary |
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| | Loading being placed on the belt off-centre | | Adjust chute and loading conditions to place load in the centre of the belt |
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| | Guiding not sufficient | | Tilt idlers and/or install belt guiding |
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| Conveoyor belt runs to one side at all points | | One or more idlers not rectangular to the longitudinal axis of the belt | | Adjust idlers |
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| | Sticking idlers | | Clean idlers and belt, install belt cleaning |
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| | Sticking or blocking guide idler set | | Maintain the guide idler set movable or replace it |
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| | Rubber cushion discs worn out or loose | | Exchange rubber cushion discs |
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| | Conveyor frame or structure not level or crooked | | Level the structure |
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| | Side loading | | Load in direction of belt travel, in center of conveyor |
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| Conveyor belt runs to one side for a longer distance | | Missing steering devices on return strand | | Install steering devices, e.g. throughed roof idlers in angle of 10-15° on the return stand |
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| | Material trapped between belt and tail pulley | | Install V-scrapers; install decking or guards |
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| | Material builds up at the pulley | | Remove accumulation, install scrapers, install decking or guards, improve loading |
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| | Not parallel installed scraper on return strand | | Check the position of the scraper; change worn scraper blades |
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| | Rubber sealing of the chute is not correct installed or not symmetric | | Install sealings perpendicular to the belt surface, change worn sealings |
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| | Loading being placed on the belt off-centre | | Adjust chute and loading conditions to place load in centre of the belt |
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| Belt running to one side at or close to the pulley | | Pulley is not rectangular and level to the centre line of conveyor | | Level the pulley, install guide idlers or/and limit switches |
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| | Material trapped between belt and tail pulley | | Install V-scrapers; install decking or guards |
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| | Material builds up at the pulley | | Remove accumulation; install scrapers, decking and/or guards and improve loading |
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| | Pretension too low | | Recalculate and increase counterweight or screw take-up |
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| Belt misalignment, following no pattern of performance | | Belt too stiff to train | | Reduce the troughing angle, tilt troughing idlers forward but not more then 2° |
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| | Belt to flexible in cross direction | | Use belt with higher rating or thicker carcass |
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| | One or more idlers not rectangular to the longitudinal axis of the belt | | Correction of idlers |
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| | Sticking idlers | | Lubricate or exchange idlers, improve maintenance |
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| General slippage | | Pretension too low | | Recalculate and increase counterweight or screw take-up |
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| | Unsuitable pulley lagging | | Check the condition of the pulley lagging. In wet conditions, use grooved lagging |
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| | Worn pulley lagging | | Change the pulley lagging. Use grooved lagging in wet conditions |
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| | No pulley lagging and dirty pulley | | Install a pulley lagging and correct cleaning devices. Increase the angle of wrap, install pulley scraper |
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| | Overloading | | Decrease the load |
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| | Material build-up | | Remove accumulation, install cleaning devices, scrapers and inverted "V" decking |
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| | Sticking idlers | | Lubricate or exchange idlers, improve maintenance |
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| Belt edges lift off idlers | | Chemical change of top cover, caused by material | | Choose grade of cover rubber according to material |
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| | Bottom cover too thin or carcass thickness too low | | Install belt with thicker carcass or bottom cover |
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| | Belt tension too high | | Modify conveyor to achieve a reduction of belt tension |
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| Belt center lifts off centre troughing idler | | Belt to crossridgid | | Install belt with better troughabillity, decrease troughing angle |
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| Belt center lifts off centre troughing idler in concave curves | | Curve design, belt type and belt tension not well adapted | | Reduce troughing angle in convex curve, increase curve radius, install belt with lower elastic modulus |
