Brakes problem
1970 Jaguar E-Type 6 cyl Two Wheel Drive Manual 65320 miles

The brakes of my jag are blocked all four.
Brake pedal also blocked.
I think on a problem with the master cilinder?
I would like to know how this servo system works.
Is there somewhere a schematic diagram?
I now the principes, but i downt know the interconnections between the master and servo cilinder, I would like to know this before demounting the whole system.
The car is not so often used.
I found a parts list the site :WWW.xks.com