Essentially a form of engine overhaul, the process involves stripping down the generator to its component parts, cleaning/inspecting/repairing as necessary, and rebuilding the generator using approved procedures. Knowing how to overhaul an engine and generator requires in-depth knowledge and skill.
What generator overhaul and refurbishment do is restore the unit to optimal operating condition, providing you with an opportunity to extend its life by many years. The generator refurbishment process also helps in reducing generator running costs besides improving generator efficiency.