Randall wrote:
>Jerry, I haven't tried it (yet), but removing the PDWA should not be a
>problem since you're making up new lines anyway. It's only
>purpose in life
>is to run the dash light.
Hugh replied:
> 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.
Sorry, Hugh, but Randall IS CORRECT. The PDWA is a safety device, but only
inasmuch as it serves to activate the warning light. It is part of the
function of the dual-circuit MASTER CYLINDER to shut off one circuit in a
failure and divert pressure to the other circuit.
> It is not a proportioning valve though. So normal brake function will be OK
> without it.
This part is correct.
It's all very clear in the Workshop Manuals.
--Andy
Andrew Mace, Vice President, Member Services
and 10/Herald/Vitesse (Sports 6) Vehicle Consultant
The Vintage Triumph Register <www.vtr.org>
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