Brake issues, pedal goes to floor over time and front drivers locks

Discussion in 'Suspension, Steering, Brake & Wheel Topics' started by BigBeech, Nov 24, 2020.

  1. Happy_Dan

    Happy_Dan Veteran Member

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    Sounds exactly like the issue I had on my 68 C-20 truck. It turned out to be the master, but I also had to replace all the rubber brake hoses. They were collapsing internally causing other issues.
     
  2. biker

    biker Veteran Member

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    Yes. They often dont leak when they fail. As knuckledragger said, they just bypass internally.
     
  3. Cardinal

    Cardinal Veteran Member Lifetime Gold Member

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    BAD master cylinder. The seals loose their flexibility and slowly leak by = pedal drops when you apply constant pressure.
     
  4. budro6968

    budro6968 Veteran Member

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    Does the fluid level drop and you have to add more? I Did a job for a guy that said he had to keep refilling the M/C and had mushy brakes. I pulled all 4 wheels. No leaks any where. When I pulled the M/C off the Booster had juice running out. It was leaking in to the booster. This guy was driving his car for a month or more like that. Lord! I said how do you stop in a hurry? He said jam the E-brake on and pump like hell.
     
  5. COPO

    COPO Veteran Member Lifetime Gold Member

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    If fluid level is dropping then there’s a leak somewhere and you will need to top up until the leak is fixed.
    I bought a rebuilt Delco 409 MC from Napa and after the bench bleeding and installing, bleeding all the wheels it leaked after going for a drive.

    I changed it for a new Napa MC and redid the procedure with no leaks. After this Covid is all done with I plan on getting my orig Delco MC rebuilt and sleeved. The Napa new MC is guaranteed for life as long as you have the bill. I couldn’t find mine when I bought my new Napa MC back in 2005 which started to leak last summer.
     

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