Brake trouble

[ssfirefighter]

I have replaced my master cylinder x 3 now. I just bought a new, and not rebuilt unit. I drove it for two days with a little bit of spongy feeling, and was waiting to bleed them. On the way to work this morning I felt a shudder and started to pull over to see what it was, and noticed that I had no brakes. They felt really spongy, then the pedal went to the floor and would not return itself. I flipped it up with my foot, and pressed again. I got a little pressure, then back to the floor and no return again. Any suggestions?

[Camper Power]

did u bench bleed the master cylinder? no offence, i knew somone that forgot to and he had some troubles that u mentioned

[ssfirefighter]

Yes I did. I actually mounted it and bled it from the pedal back into itself, then re-attached the lines / proportioning valve.

[Bob 68327]

Have you checked the wheel cylinders for leaks or failure ? That's what mine did when I lost a wheel cylinder . Just my thoughts . Bob

[ssfirefighter]

I haven't actually looked at it yet. I had it towed to the house, and had to continue on to work. I am just looking for opinions for when I get home tomorrow.

[Shyguy]

Check the fluid level and then check all the wheel cylinders and flexible hoses.

Good Luck

Danny

[dwcsr]

Originally Posted by ssfirefighter

Yes I did. I actually mounted it and bled it from the pedal back into itself, then re-attached the lines / proportioning valve.

This maybe your problem. You need the master perfectly level and then bleed it. I would bench bleed it with the prop valve on it.