Power brake broblem

Posted by A.E On 2021/6/4 1:47:15

I need help with my packard brakes.
brakes are redone last year and they worked perfectly.

Now the brakes are jammed. pedal is hard and you can not press it. all 4 brakes are locked but when you release the pressure away from lines, car rolls like it shoud be.

clearly, mastercylinder wont let hydraulic pressure back to fluid tank.

I Disassemble the master cylinder for service but I don't find anything wrong with it.

can anybody notice something that i dont?

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