The same way you bleed brakes on a car, except that you use the emergency brake lever on the actuator instead of the brake pedal. Open the bleeder valve on the caliper and have someone pull on the lever. Close the valve, then let the lever come up. Repeat until there is no air in the line. Of course, keep the master cylinder full - if you let air in the line at that end, you start all over.
Rick Marinelli, P.E.
Don't start vast projects with half-vast knowledge.