I understand, the motor was overhauled, during which the shafts were metal sprayed or was the bearing white metal replaced?
Either way, the bearings would have to be refitted. Either by mounting the bearing halves on the shaft or placing the lower half in the motor base and lowering the armature into the bearings.
My question relates to whether the bearings and journals are now aligned or "cocked" (angular error) on the shaft or in the housing. An angular error may give some strange hydrodynamic fluid effects and consequently change the vibration signals.
Do your temperature probes read oil bath, oil flow or bearing temp? Are they normal?