15. You’ll need to fill and top off the power steering system to where there is no longer any air in the Hydra Stop/steering box/steering pump circuit, which can take a while. A “driver” is needed to operate the steering back and forth, while occasionally pumping the brake pedal. You’ll hear a menagerie of sounds until the air gets worked out. The main thing is to keep topping off the reservoir. During your first testdrive, keep a bottle of power steering fluid handy—you’ll need to top it off when the level goes down.