Long brake pedal travel - Silver Shadow - Rolls-Royce and Bentley Forums
 
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post #1 of 3 (permalink) Old 08-20-2010, 12:37 PM Thread Starter
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Long brake pedal travel - Silver Shadow

Hello Friends. The brake pedal on my '69 Shadow has what I interpret to be excessive travel. The rotors are good as are the pads. Please help me understand why the pedal travel might be excessive. Thank you. -rick, in Houston



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post #2 of 3 (permalink) Old 08-20-2010, 02:52 PM
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You may not have excessive travel. (Of course, you also might, since yours is an early car and there's a master cylinder on yours.)

The brake pedal on the Shadows (and derivatives) is not like that on any other car you have probably driven. It will, whether the car is running or off, always freely travel from its resting point to the floor (or very nearly to the floor) with minimal pressure. Unlike in most other cars, where the brake pedal is intimately involved with the pressure creation process, this one serves pretty much as an open/close valve that allows pressurized fluid to flow from the accumulator to the brakes. It doesn't really have conventional brake pedal "feel" either.

If your brake pressure system 1 and system 2 lights are extinguished and remain that way, and your car seems to be stopping as it should when you apply the brakes, you're probably fine.

You should definitely do the "brake pedal hydraulic system test" that I documented in another thread on this particular forum about two years ago. You need to be certain that you do not have weak accumulators since they're your only source of brake pressure in the event of a stall. No one wants to have a stall and then find that it's impossible to bring the car to a quick and safe stop.

Brian

The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.
~ Niels Bohr


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post #3 of 3 (permalink) Old 08-20-2010, 09:39 PM Thread Starter
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Thank you Brian. My 'low pedal' quote came from the dealer where the car is consigned. I have not yet driven the car. I have restored MANY cars and have a nice collection of classics but this is my first Rolls-Royce. I have a lot to learn.

Thank you for your sage advice.

-rick



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