Monthly and Quarterly Maintenance Tasks

1. Detailed Inspection:
   • Check for abnormal noise or vibration, which may indicate misalignment or wear.
   • Inspect hanger bearings and end bearings for wear and lubrication.
2. Cleaning:
   • Clean the screw conveyor trough and remove any material buildup.
   • Ensure that discharge and feed openings are not clogged.
3. Safety Devices:
   • Test emergency stop switches and safety guards.
   • Ensure all safety labels are intact and legible.
4. Lubrication:
   • Re-lubricate bearings and moving parts as per the maintenance schedule.
   • Ensure the lubricant type and quantity meet manufacturer recommendations.
5. Alignment Check:
   • Recheck the alignment of the screw conveyor with the drive motor.
   • Realign the screw if necessary to avoid undue stress and wear.

Common Issues and Troubleshooting

1. Material Buildup:
   • Cause: Moist or sticky materials adhering to screw flights.
   • Solution: Clean the flights regularly and consider using coatings or liners that reduce buildup.
2. Excessive Noise and Vibration:
   • Cause: Misalignment, worn bearings, or loose fasteners.
   • Solution: Check alignment, tighten all fasteners, and replace worn bearings.
3. Reduced Throughput or Clogging:
   • Cause: Improper material feeding or blockage at discharge.
   • Solution: Adjust feed rate, clean discharge openings, and ensure proper clearance.
4. Overheating of Bearings or Motor:
   • Cause: Insufficient lubrication or excessive load.
   • Solution: Check lubrication, reduce load, and ensure proper alignment.
5. Drive System Failure:
   • Cause: Belt slippage, worn pulleys, or misalignment.
   • Solution: Adjust belt tension, replace worn components, and realign the drive system.