Signs of an oil leak, Thick residue buildup of dirt/dust and mineral oilSigns of an oil leak, Thick residue buildup of dirt/dust and mineral oilCleaned the residue with hard plastic bristled brush. The area must be cleaned to identify where the leak is coming from.Source of the 2nd oil leak. This is a valve coming from the Buchholz relay. This area was cleaned.Top of the transformer. Conduits distribute oil to the top of the bushing taps. Liquid tight has secondary CT wiring.CT Secondary portLiquid tight containing CT wiring from the bushings.