The sintering process is a pre-treatment step in the production of iron, where fine particles of iron ores and secondary iron oxide wastes (collected dusts, mill scale) are agglomerated by combustion. Agglomeration of the fines is necessary to enable the passage of hot gases during the subsequent blast furnace operation. The granulated sinter is ignited in the sinter machine, and the air is sucked through the wind boxes below the machine. The waste gas is sucked by the waste gas fan passed through the ESP and finally discharged through the chimney. The waste gas fan (rotor weight = 23t), supported on journal bearings is driven by an 8.4 M Watt Motor with VFD drive having maximum operating speed approx 950 rpm. The coupling is pin bush type. The motor and fan bearings have spherical sleeve bearings, lubricated by hydrostatic and hydrodynamic lubrication. During transient state, hydrostatic system started /stopped at low speed and for manual rotation for inspection purpose otherwise under steady state the bearings are lubricated hydrodynamic lubrication system. The vibration is monitored by proximity probes, connected to the protection system and the data are being transmitted to cloud server with software for detail analysis. During the last shutdown for impeller inspection, the hydrostatic lubrication system started but the impeller could not be rotated. This paper deals with the analysis of average shaft centre line plot last coast down and helped to identify and pinpoint component failure of hydrostatic lubrication system.