This short animation demonstrates the special procedures to bleed the hydraulic system properly in the following vehicles:
1984-98 Ford Aerostar, Bronco II, Explorer, Ranger; Mazda B2300, B3000, B4000, Navajo
Special procedures are required in this vehicle application to properly bleed the hydraulic system. Due to the mounting position of the master cylinder on the firewall air can become trapped in the rear portion of the cylinder. Before bleeding the system, you must remove the master cylinder from the firewall and position it so the reservoir end is higher than the push rod end. This will enable air to escape from the rear portion of the cylinders.