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TRACKING PROBLEMS

  • Problem: The belt runs to one side along given point on machine.

    The idler or idlers that immediately precede trouble point are not at right angles to longitudinal axis of belt. Advance the end of the idler to which the belt has shifted in the direction of the belt travel. Check for belt end squareness to the belt centerline.

  • Problem: The idlers are frozen and sticking.

    This is an indication of poor lubrication. Improve the general maintenance of your machine.

  • Problem: The frame of the conveyor is crooked or the idler stand is not centered.

    You need to determine the extent of the misalignment, then square.

  • Problem: Material is building up on the idlers.

    Check the installation of the scrapers or other cleaning devices on your machine. Improve the general maintenance.

  • Problem: A single section of the belt tends to run to one side along the machine.

    More than likely there is a crooked splice. The belt needs to be re-spliced with ends squared with the belt centerline.

  • Problem: There is a crooked end of the belt at the fasteners or fasteners are not joined squarely.

    The belt should be re-spliced, and if possible, splice with new fasteners.

  • Problem: There is a slight bow in the belt.

    The new belt may straighten out as it becomes broken in over time.


BELT WEARING

  • Problem: The belt is wandering.

    The belt may be too heavy or stiff for drive rollers. Replace the belt with a more flexible belt (e.g. different texture type or ply).

  • Problem: You have poor loading or off-center loading.

    Please review your loading procedures for your specific machine.

  • Problem: Thre is damaging wear on the drive roller side of belt.

    The drive roller is slipping. Increase take-up, lag drive or increase the arc of contact on the drive roller with snubber oil.

  • Problem: The loading end of the belt has buildup that is being ground between the belt and the drive.

    Improve your belt loading procedures or install plows or scrapers in front of the drive roller on the return.

  • Problem: The idlers are frozen and sticking.

    This is an indication of poor lubrication. You should improve the general maintenance of your machine.

  • Problem: Bolt heads are protuding above lagging.

    Replace the worn lagging on pulley, tighten bolts and/or cement lagging to pulley.

  • Problem: You are noticing an excessive edge wear and the belt is folding edge on edge guard or frame.

    Consider using a more stable construction, provide more clearance and smooth any rough areas.

  • Problem: You are experience side loading.

    You must load in the direction of belt travel.

  • Problem:There is a buildup of material on the drive roller.

    Install scrapers in order to eliminate buildup from pushing the belt against the frame.


TOP COVER BELT WEARING

  • Problem: Return idlers are dirty, frozen, or misaligned.

    Clean the belt and check alignment of return idlers. Also, clean and lubricate idlers and improve general maintenance. A cleaning device may need to be installed.

  • Problem: You are seeing poor loading conditions.

    You should correct the feed onto the center of the belt in the same direction as the belt runs. The material falling down from the delivery chute shold be at about the same speed as the conveyor belt.

  • Problem: Sags in the belt are letting the load shift as it passes over the idlers.

    Increase the belt tension and/or reduce the idler spacing.

  • Problem: The top cover is groved and gouged, skirt baords are pessing against the belt and/or are too hard

    Redesign the skirt board to permit material to work out, not in. Change to a softer material for the skirt board and do not use reinforced rubber for skirt boards.

  • Problem: The space between the belt and skirts seals is too great.

    Redesign the chute.

  • Problem: The metal side of the chute or skirts is too close to the belt.

    Adjust it so the cap between the metal and belt increases in direction of travel in order to avoid jamming.


BELT BREAKING

  • Problem: You find breaks in the belt parallel to the belt edge or see star breaks in the belt.

    Heavy lumps are falling on the belt or falling from too great of a height. In order to reduce the impact, redesign the loading area. Another problem could be that the belt fasterns are too large for the drive roller size being used. Replace the fasteners with the manufacturer’s recommended fasteners.

  • Problem: You see material lodged between the belt and the pulley or see it stuck to the back.

    The return run should have scrapers ahead of the tail pulley. Check the loading design to reduce material spillage.

  • Problem: Transverse breaks (folding) at belt edge.

    If you see folding up of the belt edges, improve the tracking, increase lateral clearance, redesign of the belt construction may be necessary.

  • Problem: The belt is mildewed.

    Use a belt with polyester or nylon fabrics and a mildew inhibitor in rubber compounds. All WCCO belts have synthetic fabrics and contain mildew inhibitors.

  • Problem: The idler next to the drive roller is located too high.

    Reposition the final idler in line with the drive roller and previous idler.

  • Problem: The fasteners are pulling out and tearing the belt.

    The fasteners could be the wrong size or they aren’t tight enough. Replace the fasteners, consider some with a longer reach, and inspect regularly.

  • Problem: The belt is too tight.

    Correct the belt tension.

  • Problem: Your fasteners don’t clinch tightly.

    Replace the fasteners and recheck the clinching.

  • Problem: Fasteners on the edge pull through the belt.

    Your fasteners are likely too close to the edge. Check the edge distance, leave 1/4” between last fastener and belt edge, and check that the pin is installed correctly.


BELT STRETCHING

  • Problem: The belt is too tight.

    Reduce the take-up tension.

  • Problem: You see frozen idlers and/or a buildup of material on drive rollers and idlers.

    Lubricate or replace frozen idlers and improve your general maintenance.


BELT SHRINKING

  • Problem: You notice a bad edge on the belt due to rubbing.

    Improve the alignment of the idlers, drive rollers, and tracking of belt. You may possibly consider a more narrow belt.

  • Problem: There is damage due to abrasion and/or chemical, acid, or rot.

    Specify a belt with the proper rubber compounds for the material being handled and recheck your maintenance procedures.


CRACKING COVERS

  • Problem: There is damage due to abrasion and/or chemical, acid, or rot.

    Specify a belt with the proper rubber compounds for the material being handled and recheck your maintenance procedures.

  • Problem: The belt is too tight.

    Ease tension on the belt and use some type of compensating take-up. Consider lagging drive and using snub oil.