> -----Original Message-----
> From: Hugh Fader [mailto:hfader@usa.net]
> Not quite true. It is also a safety device. It isolates the front and rear
> hydraulic circuits. In the event that one of them fails, the shuttle valve
> shifts to cut it off and also turns on the light. The other circuit will
> still work giving you some stopping power.
Hugh and others, you might want to read Nelson Riedel's excellent write-up
on the TR6 braking system at
http://www.buckeyetriumphs.org/technical/Brakes/Theory/Theory.htm
(you'll have to cut & paste that link back together, or simply go to
www.buckeyetriumphs.org and click on 'Technical', then 'Brake Theory and
Overview')
The PDWA does not cut off the flow of fluid even when the piston moves to
one side.
Randall
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