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brake pedal travel S70 1998

posted by  herbertcat on  Thu Aug 23 12:54 CST 2007
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last visit: Sat Oct 18 09:01 CST 2014
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I recently did a complete brake job, new pads, quality rebuilt calipers, and new rotors...completely flushed brake system twice with a lesser brand brake fluid, and then bled and re-filled system with the good stuff(Castrol LMA)...car stops straight and true, just the pedal seems to not be as firm as I would like..dealer had told me recently to replace the power brake booster, but with only 64k on the car, doesn't seem to be a likely problem area..am I missing something? read something about a check valve in the brake booster...is this the culprit? thanks to all








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    brake pedal travel S70 1998

    posted by  someone claiming to be ksg on  Fri Aug 24 03:04 CST 2007 [RELATED]

    Sounds like there may be a very little bit of air still in the system. It only takes a tiny bit. The booster seems unlikely as the brakes are actuated by a solid rod from the pedal and the booster only assists in the actuation. If designed another way there would be a risk of losing your brakes if the booster goes bad.

    How is the pedal travel when the car is not running and after you have pressed the brake pedal a number of times to remove all remaining influence of the booster? If still soft that would point to air in the lines.

    Also maybe if a caliper was not so good before and the travel wasn't quite free, it has now become normal?







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