Thread: Dual 7" Servo
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Old 18th February 2012, 14:27
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Originally Posted by peterux View Post
Thanks to everyone who considered this potential risk and replied with their views and suggestions above.
I'm still doing some background investigation and I will post an update if I can get anything more definitive.

...peter
I got me a copy of the 'well known' workshop manual for the Ford Sierra 1982-1993. (Cost me £2.96 inc. post!).

It has a very comprehensive braking system with full description and types. The good news is that there is not any mention of the dreaded 'Residual Pressure Valve'.
The exploded diagram and overhaul section of the master cylinder is straightforward and shows no sign of any RPV either.


Sierra Brake master by marlinpeter, on Flickr

I am now confident that there is no issue with using the 1982-88 Sierra master cylinder on cars with either drum or disk rear brakes.

...peter
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