Stopping transformer oil leakage involves identifying the exact leak source and applying a permanent mechanical fix. Common solutions include replacing aged gaskets, resealing flanges, repairing weld defects, replacing leaking bushings, and correcting oil level or pressure control issues. Temporary sealants are generally avoided because they can contaminate oil or fail under temperature cycling. After repairs, oil level is restored, the area is cleaned, and follow up inspections and oil tests confirm that leakage has been eliminated.
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