In response to the serious running deviation of Baosteel's 700 m² liquid-sealed ring cooler during heat load production, after measurement and analysis, it is concluded that the main reason for the running deviation of the ring cooler is the water-break of water seal groove on the upper part of the trolley causing long-term thermal deformation of the revolving frame of some trolley sections with certain deviations in the installation of the drive unit, horizontal rail, and side rail of the ring cooler, through the inspection of the frame shape, horizontal rail elevation and roundness, side rail roundness and elevation, and the installation position of the drive unit, etc. In order to rectify the deformed frame of the ring cooler, the gasket is added in between the side block wheel and the side block rail. At the same time, the driving part, the horizontal rail and the side rail of the ring cooler are adjusted according to the design drawings. After the implementation, the deviation of the ring cooler has been significantly reduced.