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53 New Yorker brake booster problem


jcox04

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I have been slowly restoring my 53 for several years. Close to finishing but power booster is not cooperating. I have replaced wheel cylinders, flex hoses, brake shoes and rebuilt master cylinder. When I drove car around the block the brake pedal travel kept diminishing and brakes tightened up. Car would still move under power but brakes were tight. When I shut off vehicle brake lights would stay on for about 10 minutes (pressure switch). Next day pedal had normal travel but  again moved up with several pumps of pedal.

 

I found a rebuilder on ebay and had unit rebuilt. About a year lapsed as I had family issues to deal with. Upon installing new unit and bleeding brakes I still have the same problem. I tried disconnecting the vacuum line to unit, but still have the same tightening issue when the brake pedal is applied several times. I tried contacting rebuilder with no success.

 

My next move is to bypass the booster, however if I remember correctly, there is a return line from the booster to the master cylinder?

 

I'm open to suggestions

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A faulty/failing frame mount  booster can suck your master cylinder dry before you realize where that huge cloud of white exhaust smoke came from....and then......

zero brakes.:eek:

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