Hi, I have fitted a new brake booster and brake master cylinder on my Mercury Montclair from 1957. The vacuum booster is 7 inches and the main brake cylinder having a two circuit which is a corvette cylinder. I have all the drums left when I was only looking to get a two circuit system. I have kept my old vacuum tank left in the system to provide a stable vacuum. I have made a separate intermediate plate and kept the old bracket in the torpedo wall from the original Bendix brake booster. All push rod from the pedal is original to the torpedo wall. On the new vacuum booster, I have measured a new push rod that fits the old bracket from the pedal. I already have a vacuum gauge mounted in the car. I have also checked that all the rods and settings on the rods are okay. So as to avoid that the brakes can be on. Now that I have bled the system and tested the car so I have no function of the brake servo. It's just like having brakes, with out no brake servo. You have to press the pedal hard. I do not see any change in the vacuum, It is stable on the meter. Could it be the valve on brake booster that do not work? Does anyone have any tips what could be the problem. I have no vacuum leaks.

Drives: Mercury Montclair 1957th

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