We now come to the general mechanism. Every six months, check the oil level of the drive-housing and, if necessary, top off with IBM 15 to the level of the inspection hole.
It's just a pigeon, looking for its nest. It doesn't know that it's wild. It doesn't know that it scares me. Why am I frightened so easily? Pigeon, why can you scare me? Am I not part of your life anymore? Am I not welcome anymore? Pigeon?