These pot may have an inspection plate on the top where the tap changer knob will be under it submersed in oil, if not you will have to take the lid off to get to the knob. Do yourself a favor and check the heat on the bushings before you go into it with a heat gun or infrared. If the bushings are showing hot or warm from the inside you may want to tighten them up while you are in there.
Oh yeah and DON'T drop any tools,washers, or other foreign matter in the pot, it makes for a long day. Not that I know anybody that has done that or anything...
