No brake pressure

Discussion in 'Brakes for your Classic Mopar' started by Blackhatguy, Jan 12, 2019 at 1:18 PM.

  1. Blackhatguy

    Blackhatguy Well-Known Member

    Messages:
    136
    Likes Received:
    55
    Joined:
    Dec 20, 2017
    Location:
    Texas
    Local Time:
    5:52 PM
    I'm not quite sure why it started, but my right front brake started dragging, then it got hot and destroyed the shoes. When it blew, there was also a big white puff of smoke from all of the brake fluid that sprayed out of the wheel cylinder. I changed the hose, and the wheel cylinder, and bled the brakes, I also of course change the shoes and hardware.

    But now, pedal just goes straight to the floor.

    I have no leaks anywhere.. Do you think something in the master cylinder was damaged? I'm at a loss here for ideas...
     
  2. dodge71demon

    dodge71demon Well-Known Member

    Messages:
    2,902
    Likes Received:
    153
    Joined:
    Apr 29, 2009
    Location:
    Indiana
    View My Photos
    Local Time:
    6:52 PM
    forgot to fill up the master cylinder with brake fluid -- I have no clue
     
  3. Blackhatguy

    Blackhatguy Well-Known Member

    Messages:
    136
    Likes Received:
    55
    Joined:
    Dec 20, 2017
    Location:
    Texas
    Local Time:
    5:52 PM
    I forgot to mention too, when I press on the pedal it shoots a stream of brake fluid straight up out of the reservoir. I just made a mess all over the place because I forgot to put the lid back on. But there is absolutely no resistance to the pedal, just go straight to the floor
     
  4. RichB

    RichB CherryCuda65

    Messages:
    241
    Likes Received:
    120
    Joined:
    Feb 10, 2016
    Location:
    South Carolina
    View My Photos
    Local Time:
    6:52 PM
    Seals on the master cylinder must have failed. It won't build pressure but will move some fluid out. They can go bad even when new.
     
    • Like Like x 1
    • Agree Agree x 1
    • RedFish

      RedFish Well-Known Member

      Messages:
      22,480
      Likes Received:
      1540
      Joined:
      Sep 5, 2007
      Local Time:
      6:52 PM
      Any of them will shoot fluid up in the reservoir unless you work it very slowly.
      Bled all the lines starting at right rear, then left rear, then right front, then left front?
      Full stroke of a master cylinders piston causes travel over debris that has accumulated over a long period. Most times the master doesn't fail until a week or 3 after a catastrophic fluid loss and that is typically a small bypass, slowly sinking pedal.
       
      • Like Like x 1
      • Agree Agree x 1