Neutral goes to the lamp socket shell that is more likely to be touched accidentally. Hot goes to the center contact inside the socket.
Usually the screws are "sort of" color coded with silver plating for neutral.
For an all plastic bodied fixture, leave the ground wire coming into the box curled up and unconnected, or connect it to the box itself if the box is metal.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.