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  • Brakes: Brakes disappeared

    Just got a 1956 Power Hawk. Been sitting since the 90's.
    Brakes worked when we drove it on and off the trailer,
    and when I pulled it in the garage. Now, no brakes. Pedal
    just goes to tge floor without any resistance at all. Checked
    the master cylinder and it is full. Cant see any leaks.
    So, did my master cylinder just die?

  • #2
    If sitting since the 90s, I would note even try to troubleshoot the brakes; just disassemble every component in the brake system, inspect and repair/replace as needed. Odds are, yes, the MC quit pumping, but it may have done you a favor in doing so. Otherwise, if like me, you'd keep limping it around for way too long. Good luck with your PH, they are probably the most functional of all the 56 Hawks, IMHO.
    Last edited by JoeHall; 09-24-2017, 01:43 PM.

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    • #3
      Your master cylinder may not have died (it could have), but it would only take one wheel cylinder to die to cause no pressure to build in the system. Check your wheels on the inside for signs of brake fluid leaking from the drums/backing plate and onto the wheel & tire. Since the wheel cylinders are higher than the master cylinder, it would take quite a bit of pumping to drain the master cylinder reservoir. Regardless, Joe is right, after this much time...a rebuild is in order anyway. Better to have it stopping than running.

      Best of luck with your new acquisition.
      John Clary
      Greer, SC

      SDC member since 1975

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      • #4
        I agree with JoeHall, time to replace or rebuild all hydraulic cylinders, master and slaves. Replace all rubber flex lines. IF I were doing it, I'd opt for a dual master cylinder and front disc brakes too, plus I would replace all of the steel brake lines. They rust and corrode from the inside and outside and its been 61 years.
        The cost is pretty cheap considering the cost to repair collision damage and bodily injury if the brakes were to fail.
        sigpic1966 Daytona (The First One)
        1950 Champion Convertible
        1950 Champion 4Dr
        1955 President 2 Dr Hardtop
        1957 Thunderbird

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        • #5
          Is there a dual master cylinder available?
          If so, can someone please point me in the right direction?

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          • #6
            Turner Brake makes the adapter bracket to install the dual MC. Check with Jim to see which master Cylinder he recommends for your application.
            Originally posted by jeryst View Post
            Is there a dual master cylinder available?
            If so, can someone please point me in the right direction?
            sigpic1966 Daytona (The First One)
            1950 Champion Convertible
            1950 Champion 4Dr
            1955 President 2 Dr Hardtop
            1957 Thunderbird

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            • #7
              http://turnerbrake.com/mcbrackets.html

              Go to M/C brackets

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              • #8
                Originally posted by jeryst View Post
                BRAKES DISAPPEARED
                Honest I did not take them!
                Corley

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                • #9
                  I have some extra brakes laying around here, but no names on them.
                  Originally posted by Corley View Post
                  Honest I did not take them!
                  sigpic1966 Daytona (The First One)
                  1950 Champion Convertible
                  1950 Champion 4Dr
                  1955 President 2 Dr Hardtop
                  1957 Thunderbird

                  Comment


                  • #10
                    Brakes fixed. Yea!
                    Last edited by jeryst; 11-07-2017, 06:28 AM.

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                    • #11
                      Originally posted by jeryst View Post
                      Brakes fixed. Yea!
                      What did you have to do to fix them?
                      RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.

                      17A-S2 - 50 Commander convertible
                      10G-C1 - 51 Champion starlight coupe
                      10G-Q4 - 51 Champion business coupe
                      4H-K5 - 53 Commander starliner hardtop
                      5H-D5 - 54 Commander Conestoga wagon
                      56B-D4 - 56 Commander station wagon
                      60V-L6 - 60 Lark convertible

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                      • #12
                        Originally posted by RadioRoy View Post
                        What did you have to do to fix them?
                        The master cylinder went bad.

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                        • #13
                          Originally posted by jeryst View Post
                          The master cylinder went bad.
                          The wheel cylinders will probably be next. You might replace them, and the flex hoses, before they go bad.
                          RadioRoy, specializing in AM/FM conversions with auxiliary inputs for iPod/satellite/CD player. In the old car radio business since 1985.

                          17A-S2 - 50 Commander convertible
                          10G-C1 - 51 Champion starlight coupe
                          10G-Q4 - 51 Champion business coupe
                          4H-K5 - 53 Commander starliner hardtop
                          5H-D5 - 54 Commander Conestoga wagon
                          56B-D4 - 56 Commander station wagon
                          60V-L6 - 60 Lark convertible

                          Comment


                          • #14
                            When the mechanic looked at all of the system he said that everything else looked pretty new.
                            I will try to get in touch with the previous owner to find out because he never mentioned
                            anything.

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                            • #15
                              Flex hoses can 'look' fine on the outside and be completely collapsed internally.
                              With age, maintenance needs to be more than just visual.
                              Especially with brakes. Double that concern with a single master brake system.
                              HTIH (Hope The Info Helps)

                              Jeff


                              Get your facts first, and then you can distort them as much as you please. Mark Twain



                              Note: SDC# 070190 (and earlier...)

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