Re: Fred and Dan's Long Term Storage 55 Patrician

Posted by jfrom@kanter On 2016/12/8 14:59:13

From the engine and fuel system we moved our attentions to the brake system. Inspection of the wheel cylinders determined that replacing was necessary. So the lines were flushed and new wheel cylinders installed. We bled the system and left the BTV Power Unit intact as to see if 40 years of hibernation would have any affect. The unit worked and the system was bled. But upon a test drive the hydraulic section worked flawlessly but the power assist did not as the pedal was rock hard. At that point the car was driven up street to our restoration shop to have the BTV removed and repaired.

We removed the BTV from the car and upon initial disassembly we found the unit to be in over all good condition. We did find that rust and debris had built up between the leather piston seal and the wall of the vacuum can during the last 40 years of sitting. The build up between created a gap causing loss of vacuum leading to the hard pedal. The seal at the back of the hydraulic section was starting to exhibit signs of leaking so we elected to rebuild the entire unit. All the seals and gaskets were replaced and included a new stainless steel piston as well. Since rebuild the unit has been tested and reinstalled in the Patrician and is operating flawlessly.


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