Brake problems

[wildhorse51]

I have a 99 F 250 4x4. Just replaced line to the rear, calipers,rotors and pads on rear. Bled out fine. 500 miles down the road,hooked on to a trailer. First stop brakes go to floor. Pumping don't help. Did this 7 or 8 more time on way home. Is this Master cly. or booster?

[TooManyToys]

A good chance that when you bled the brakes the brake pedal was pushed to the floor. When this happens on an older vehicle that has not has the brake fluid changed often the M/C piston cups usually get torn on any corrosion in the back of the M/C bore that doesn't normally get action.