I have a friend that has a 1995 F-150 and his brake pedal goes almost to the floor before he really gets any braking power. We bleed the brakes a few times all the way around and have had no air come out and are getting the brake fluid to squirt pretty good. We have also adjusted the rear drums. Would the master cylinder be the next thing to go after. Thanks.

 

if the rear drums are adjusted out properly than yes my next guess would be the MC.

 

Well the master was not the problem, I replaced it today. Still the same. I also took the master back off and tried to see if I could get any adjustment out of the rod coming out of the brake booster that presses on the master, I got it to thread out to around an 1/8" longer. I don't think its the oem brake booster, did they make different length rods for the brake boosters? Any other ideas?

 

Push rod to booster measurement = 0.980 to 0.995 (measured from master cylinder mounting surface to tip of rod)

The replacement master cylinder, was it a re-man or a new one?

Did you strictly adhere to the bench bleeding instructions included with the master cylinder? Did it pump up solid before you put it on the truck?

 

The new one was a re man ford one. And yes I did bench bleed it.

 

I have to ask....did you also bleed the RABS module as well?

 

yes I did bleed that too

 

The new one was a re man ford one

I never tried a re man from ford, I do know re mans from say Napa and Car quest won't pump up.

And yes I did bench bleed it.

Ok but you didn't state how, how did you bench bleed it? Or if it was solid when you where done, as in piston could only be pushed in about a 1/8 to 1/4" and was solid at that point.

If you did so as instructed in the box and was solid, it did pump up, then that's probably not the problem.
However if you did it "old school" if you used fittings and a couple short sections of hose to return the fluid to the tank, used full strokes of the piston while doing so, then that's probably gonna be the problem.