Because you have a 3ph generator, might be fun to hook it up once setting in the haybarn, start it up, run through all of the gears and feeds, see what you have. Don't swing the arm off the base footprint for safety. Most likely uses turbine oil in the drill head for lube oil. ( AW46 ) Most likely everything is fine, but now would be a good time to know before anymore money goes into it, or a location for it ??
Chris