hi all,
first thanks for the help regarding my prior brake freezing up problem. a shortened pushrod seems to have fixed the problem. (but maybe not, because of the below)
now, an opposite problem has occurred. after breaking to a stop or to a greatly reduced speed, the pedal will slowly travel to the floor without any additional braking action occuring. seems not to happen all the time but is dependent on how long the pedal is depressed. the longer depressed the more certain the pedal will continue it downward path.
without the engine running, application of brake pedal pressure produces a hissing sound of air escaping in the area of the m/c-brake-booster. application of a soap solution did not reveal the source of the hissing sound.
the prior owner of this vehicle had posted a similar problem of pedal to the floor, the system was professionally rebuilt and had lines, calipers and the m/c replaced, the brake-booster was not replaced.
another thread with a similar pedal-to-the-metal problem suggests the brake-booster by reason of age may have developed a leak.
a leaky diaphram (small hole) would explain both the hissing noise and the pedal-down behavior.
am i correct in my diagosis??? thoughts or comments would be appreciated,
nazgul
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