I call myself having rebuilt my brakes, replacing the brake lines, cylinders, and shoes at every wheel. I did this because, while driving my '75 CJ5 one day, the pedal, which had been getting lower, went to the floor. I got out of the Jeep and the master cylinder was empty. Anyway, I'm outside trying to bleed the brakes, and every time my assistant steps on the brake pedal, brake fluid leaks out of the middle of the front and the middle of the rear of the master cylinder cover. Can anyone tell me what's going on? Do I have a bad seal between the master cylinder and the cap and need to replace both? I appreciate any help y'all can give.