I have never posted a question on here because i have always got all my answers from other posts. I'm hoping someone will be able to help me. I have a 1975 F250 High Boy that has drum brakes all the way around. It started off with the brakes grabbing on the rear and the pedal being very touchy. I changed out the master cylinder, wheel cylinders on all wheels, brake pads, wheel seals, and one brake line on the left rear. The brakes no longer grab, but the pedal goes pretty low before the brakes start working and once they are fully applied the truck can be put in gear and it will still want to roll. I first thought the brakes were out of adjustment but i have adjusted them 3 times now and bled the system 4 times and nothing helps. I also noticed that when we were bleeding the brakes that brake fluid was shooting out of the front reservoir on the master cylinder. Im not sure if that is right. I got this truck from my mom after my dad died, and he always had problems with the brakes. Any help with this would be greatly appriciated

 

Maybe your booster isn't functioning?

What do you mean fluid was blowing out the front reservoir?, Between the lid and the seal?

 

With the cap off the front one shoots fluid out when the brake is applied. The rear one doesnt do it, just the front. You might be right about the booster. When the brake is applied with the engine running there is a loud hiss of air.