Hello everyone,
I'm new here and hope someone as answers, because the dealership is of no use and shops don't have any either. I have a 95 F250 and the brake pedal travel is +50% before any braking takes affect and more often than not it's almost to the floor. I have replaced everything and still have a pedal that drops. I have heard that changing the master cylinder to one from a F450 will fix the problem or installing a hydro boost system. What affect does this do to the RABS and the fluid control valve on the 250 master cylinder? I'm at wits end here folks and any help is greatly appreciated

 

Have the rear drums been hand adjusted to take all free play out of them?

Has the whole system been bled starting at the passenger side rear(farthest away) to the drivers front(nearest) including the proportioning valve on the frame.. it has a bleed screw too.

 

Yeah, I have bled the brakes 4 times starting with the rt rear,lt rear, rabs valve rt ft,
lt ft. And yes the rears have been adjust and readjusted just to make sure. Both wheels turn freely one time.

 

From what I have seen, there is an adjustment you can make on the Master Cylinder to bring your pedal up. Maybe someone who has done this can comment better than I can.

 

original master cylinder, or has it been changed?
most people do not realize that when changing the master you need to reset the pushrod for proper length, otherwise you get a low pedal or the brakes hang up.

 

I have changed all components in the brake system and I did fabricate the Guage tool for setting the clearance for the booster push rod. I really want to find the cause and fix it.