What do you think is the reason for high horizontal 2x and thus elevated O/A vibration at pump A motor and flywheel motor end compared to pump B? Vibration levels at motor and flywheel vertical direction, flywheel pump end and all the pump monitoring positions are normal and in line with the B & C.
Three identical pumps, any two run together, third one are standby, interchange every 2nd week, part of the primary cooling system and are critical to the plant operation running 24/7. A has been suffering high vibration historically compared to the rest and trending up recently. Soft foot and alignment checked, found within spec, checked the coupling and found ok.