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  • #16
    I fixed my brakes this Saturday with a NEW master cylinder. I thought that rebuilding my old one was a safe bet but I think I may have discovered the problem. It seems that the parts in the rebuild kit which were new from Wagner may not be the same as the original. With the rebuild kit the piston cannot return far enough to clear the by pass hole even with the rod adjusted way short. I am going to dissassemble my old one this weekend to verify this problem. I tried everything to clean the hole out and nothing would go through it. I even bought a welding tip cleaner which has some very small wires and none would go through. But if the piston is blocking the hole that would explain the problem. I know know that from day one the rebuilt one never worked like the new one. I guess from now on I will have to measure everything I get if its new production.[:0]

    Restore it, don't replace it.Keep the Studebaker reproduction industry going

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    • #17
      Mike, I removed the piston and spring before I started messing with it. The port is really stopped up. The screwdriver I have is slightly less than .030". I'm going to look for a .040" bit. I think the kit I used is a good one as it is from old stock, but 49c.... may be right in just replacing it.

      63 R2 Avanti

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      • #18
        Sounds like you're home free; just clear the port. If you are buying a bit, .030" is correct.
        The small holes in the new tandem master I'm using were never drilled at the facory; just the 3/16" countersink. Brake lights stayed on and brakes dragged, in the garage. The smallest bit I had was .040".
        Remember, there should be very slight free play, between the push rod and piston, when you install the master.
        Mike M.

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        • #19
          I ended up buying a torch head drill bit set. The biggest bit was 1\8". It worked perfectly! No more pressure on the brakes. Thanks for everyones help

          63 R2 Avanti

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          • #20
            THANK YOU!!!!!!!!!!!! This post has solved a problem Ive had since putting the Cruiser back in service after a 15 year layup. One tiny hole......so much problem with plugged up. A quick zip with the dremel and the tiny drill bit and problem solved. I was ready to start buying brake cylinders!

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