If your system has
leaks or is loosing
oil, you should look for leaks 1st. You may need to install a
rebuild kit in the
pump or cylinder and tighten all fittings.
My Wagner
steering has the reservoir in the pumps (where the
wheel is connected). There will be a
plug to remove. Some people connect a tank either temporarily or permanently in place of the
plug. Rotate the wheel, keeping the reservoir full. Air will be expelled as it uses
oil. When you have dispelled all the air you can at the
pump, open the bleed valves, one at a time, on the cylinder while someone maintains pressure with the wheel.