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Converting from power brakes to manual

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  • Converting from power brakes to manual

    I am converting my 61 Hawk from power brakes to manual because of a missing hydravac. I've looked around and have been unable to secure one. I am also converting to a dual master cylinder using Turner Brakes' conversion bracket. I have a seperate brake pedal pivot point that bolts to the frame. (See photos) This is the pivot towards the front of the car. I cannot find a reference to this part in any of the manuals, it is a seperate bolt on part. Is this unique to power brakes? Do I need to find a different pedal configuration for manual brakes? It is a 3 spd w/OD so I do have a clutch pedal also.


    Brake Pedal Pivot is at the top of the picture.


    Brake and Clutch Pedal Configuration

    Wayen K.
    Libby, MT
    61 Hawk (Project)

  • #2
    Yes the non powerbrake cars use a different pedal assy, it attached differently under the car. I did this changeover on my 62 GTHawk.
    I can't remember all the details but I remember the pedal for power brakes is shorter.You would be better off to find a parts car or someone that has these parts.
    Frank van Doorn
    Omaha, Ne.
    1962 GT Hawk 289 4 speed
    1941 Champion streetrod, R-2 Powered, GM 200-4R trans.
    1952 V-8 232 Commander State "Starliner" hardtop OD

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    • #3
      Anyone know of a supplier for rebuilt Hydravacs, I don't have a core. I think it would be easier to keep the power brakes!

      Wayen K.
      Libby, MT
      61 Hawk (Project)

      Comment


      • #4
        I think JDP has them, rebuilt.

        Miscreant adrift in
        the BerStuda Triangle


        1957 Transtar 1/2ton
        1960 Larkvertible V8
        1958 Provincial wagon
        1953 Commander coupe

        No deceptive flags to prove I'm patriotic - no biblical BS to impress - just ME and Studebakers - as it should be.

        Comment


        • #5
          I got one from JDP! Nice work too! Note that the Turner dual master cylinder or any dual master cylinder will not work with a Hydrovac, for some reason Turner does not tell anyone that? He should put a disclaimer on the kit and ask the question before someone orders it.

          Also, you have a Hill Holder which I believe you will need to eliminate also.

          Dan White
          64 R1 GT
          64 R2 GT
          Dan White
          64 R1 GT
          64 R2 GT
          58 C Cab
          57 Broadmoor (Marvin)

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          • #6
            There's one for sale on ebay right now. Neal

            http://cgi.ebay.com/ebaymotors/Hydro...QQcmdZViewItem

            And heres another.

            http://cgi.ebay.com/ebaymotors/stude...QQcmdZViewItem

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            • #7
              Actually you wouldn't have to eliminate the HillHolder, just plumb either the front or rear brakes through it.

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              • #8
                JDP doesn't have hydravacs available right now. Anyone have a core available to be rebuilt? Most places I have checked need cores. If you can run the hillholder through either the front or rear lines, what would be the ramifications of running the power unit through the front lines? The front has most of the braking power. Just a thought.

                Wayen K.
                Libby, MT
                61 Hawk (Project)

                Comment


                • #9
                  Running only one braking circuit through the Hydrovac would probably cause that one to lock up before the other. Once you apply the brakes, the hydraulic pressure opens circuits in the Hydrovac which allows engine vacuum to apply additional force to the piston pushing the brake fluid. If hooked up to the front brakes, I have a feeling it would make the rear brakes pretty much ineffective at anything less than a white knuckled, both feet on the brake pedal kind of stop. JDP probably has a better idea of the effects though than me.

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                  • #10
                    I've got a core here that I THINK came off a truck. Does anyone think single-circuit assist is anything but single-circuit assist? In other words, assistance is assistance, no matter what. Right? The vacuum part of this thing is just like the car hydrovac. The only thing that looks a bit different is the hyd part.

                    Miscreant adrift in
                    the BerStuda Triangle


                    1957 Transtar 1/2ton
                    1960 Larkvertible V8
                    1958 Provincial wagon
                    1953 Commander coupe

                    No deceptive flags to prove I'm patriotic - no biblical BS to impress - just ME and Studebakers - as it should be.

                    Comment


                    • #11
                      It is definitely not adviseable to use the Hydrovac on one end of the brake circuit! You have a choice of either Hydrovac or dual master cylinder. If you do a search on this forum there are numerous threads regarding the Hydrovac, dual MC, etc. These maybe good reading for you. I would also try looking at some of the Studebaker used parts vendors in the TW to find a Hydrovac core.

                      Dan White
                      64 R1 GT
                      64 R2 GT
                      Dan White
                      64 R1 GT
                      64 R2 GT
                      58 C Cab
                      57 Broadmoor (Marvin)

                      Comment


                      • #12
                        I wasn't seriously concidering using the Hydrovac with the dual M/C setup. It was a just a topic to throw out to check the possibilities. I am not in a serious need for the part right now, probably won't need it until spring, the body is still on the rotator. I do have about 5 tons of scrap metal and car parts I might sort through back at the shop on the farm where I got the Hawk, I suspect the original Hyrdovac may be there! But before I put the body back on the frame I do need to decide which braking system to use.

                        Wayen K.
                        Libby, MT
                        61 Hawk (Project)

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