Check all around braking system for leaks of brake fluid?
BRAKE CALIPERS & PADS
NOTE: Procedure for removing/installing front and rear calipers is same.
NOTE: To prevent master cylinder overflow when caliper piston is depressed, remove and discard some brake fluid from master cylinder.
Raise and support vehicle. Remove wheel. Remove brake hose-to-caliper bolt. Remove and plug hose. Place a large " C" clamp on caliper. Tighten clamp to bottom piston in cylinder bore. Remove clamp.
Remove caliper pin bolts. Remove caliper from rotor. Remove brake pads. Remove anchor plate rail clips. Check brake pad wear.
On all models except Excursion and Super Duty Pickup, replace brake pads if lining is less than.04" (1.0 mm) above backing plate at any point. On Excursion and Super Duty Pickup, replace pads if lining is less than.06" (1.5 mm) above backing plate or rivets at any point.