The vibration monitoring programme includes all the gas and steam turbines, boiler feed pumps, condensate extraction and circulating water pumps plus several auxiliary pumps and compressors.

Vibration analysis has been able to reveal many equipment problems at an early stage and allowed shutdowns to be planned and rectification work to be carried out. Several early-stage bearing failures in pumps and air compressors have been detected. Misalignment of rotating plant, loose foundation bolts and pump impeller wear are other types of equipment problems that have been identified and corrected before failures have occurred.

Around 100 items are monitored monthly in Paka and 55 in Pasir Gudang. Occasionally additional equipment is added to the schedule when the maintenance personnel are concerned about vibration conditions.