Master Cylinder: Inspection
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1997 Ford Pickup, 1997 Ford F-Super Duty, 1997 Ford Cab & Chassis, 1996 Ford Pickup, and 1996 Ford F-Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Clean all parts with isopropyl alcohol and blow dry with compressed air. Ensure all ports and vents are open and free of foreign matter. Inspect master cylinder bore and all parts for excessive wear or damage. If bore is damaged, replace master cylinder.