Lister,
My (somewhat limited) reading and knowledge of automotive braking systems,
has led me to understand that drum brake systems require a "residual
pressure valve". This device does not let all of the line pressure drop and
keeps the brake shoes from retracting fully and causing too great a pedal
stroke. I know that other cars use them. The question is: Did Triumph use
one on the rear brake circuit of the TR6 and if they did, where is it
located ? I have looked over my Bentley and Haynes manuals and can find no
mention of it. Is it integral to the master cylinder ?
Thanks in advance,
Hugh Barber
Hollisrer, CA
'73 TR6
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