[Healeys] Brake servo

[Bob Brown]

 Pushing the brake pedal several times
resulted in blocking of the front
brakes and the car could not be moved
anymore).
However after a little time
the brakes released themselves again.


More likely a rubber brake line has
collapsedinside where it can't be seen. 
When you push the pedal to force
fluid through the line opens, but fluid can not 
return due to the old brake
line. If your rubber lines to the caliper are old 
I would repace them first
before attacking the servo as the problem.

Bob