Master Cylinder: Inspection
WARNING: This page does not describe the selected car, but rather 13 other vehicles, including the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, 2004 Ford Excursion, and 2003 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Manufacturer does not recommend honing cylinder bore.
Clean the brake master cylinder bore using isopropyl alcohol and inspect for damage. If bore is damaged, replace master cylinder.