The transformation of the center and the journal center in the process of the installation of the water guide tile in the process of transformation of the 2 # unit of the sector power station，by checking the size of each component，it was determined that there is a deviation from the design of the size of the inner shell of the old pipe seat and the size of the design sheet.Installation optimization was used in the transformation process of 2 # unit，increasing the steel plate on the flange side of the wheel chamber gives the unit axial dimension compensation，eliminating the defects in the equipment assembly，to achieve the purpose of transformation efficiency，and achieved success.