01

Two maintenance models

Preventive maintenance schedules work around expected component life. Predictive maintenance still uses routine inspection, but changes the intervention date according to actual condition and performance. The aim is to act before failure without replacing healthy parts unnecessarily.

02

Watch for evidence

Operators and maintenance staff should report changes in sound, heat, tracking and product flow. Inspect belts or chains for fraying, damage, debris and slack; check bearings for heat or noise; and investigate unusual motor or gearbox temperature and sound.

  • Trend repeated findings instead of recording only pass or fail
  • Correct the cause of poor tracking before fitting a replacement belt
  • Increase inspection frequency when duty or environment becomes more severe

03

Prepare the response

A useful predictive programme needs trained people, clear inspection records, equipment-specific procedures and a sensible critical-spares list. Inspection frequency should reflect operating hours, load, contamination and the consequence of a stopped line rather than a universal interval.

Field checklist

Include tails, transfers and small changes in condition

Tail assemblies and transfers deserve deliberate inspection because contamination, bearing wear, poor alignment and belt damage often appear there first. Predictive work becomes useful when repeated observations—temperature, noise, tracking correction or debris—are trended against operating conditions instead of recorded as isolated events.

  • Inspect both tail bearings and belt edges
  • Record recurring tracking adjustments
  • Relate wear to load, cleaning and operating hours
  • Keep the response plan and critical parts ready before a limit is reached