Posted by MeAnthony on October 19, 2007 at 20:54:55 from (65.73.153.214):
My father-in-law has a '94 Dodge 1/2 ton, 4x4. It has rear wheel anti-lock brakes only, not 4 wheel antilock.
The problem is that the brake pedal is darn near on the floor. He's had this truck over 10 years, and it's been like this since the first time he put brakes on it. The master cylinder has been replaced twice(made no difference), the vacuum booster has been checked(good), the brake system has been bled by us(several times; always get good fluid flow, no air. Still made no difference) and he once had the system power-bled by a shop(I don't know how that works, I just know he had it done. This also made no difference).
Currently, the pads and shoes are new. The drums are new. The rotors are in good shape. The rears are adjusted pretty snug. But virtually no pedal. The pedal is solid, and you will stop, but not till almost the end of the pedal travel.
The pedal is not spongy, like it has air in it. It feels like the shoes/pads are almost completely gone or terribly out of adjustment, and the calipers/wheel cylinders are travelling too far.(Trying to illustrate that the feel of the pedal oesn't indicate air in the system either.)
Tonight I had the cap off the fluid resevoir, and had him slowly push the pedal down(you can hear a noise like fluid squirting out). The brake fluid in the large chamber jets upward about 1 1/2 inches when slowly depressing the brake pedal. The fluid in the small chamber jets upward about 1/4 of an inch. Is this supposed to happen? Or is the fluid leaking/bypassing internally? Sending pressure meant for the brake system back to the fluid resevoir instead? Or am I missing something else?
Opinions and suggestions are appreciated. Thanks for taking the time to respond.
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