Question about 1998 Ford F150 Regular Cab
Any ideas. I have a 1997 F-250 HD deisel supercab 4x4, it has a brake booster not the hydro. I replaced the brake booster since the pedal was rock hard and not much happening even when you stand on the brakes. My helper replaced the wheel cylinders on the drums as we did an inspection at this time and he thought they were not moving free enough. At that time he broke both brake lines by stripping out the lines going to the brake wheel cylinders. I replaced the lines and bled the brakes. But now have a totally mushy brake pedal with no brakes. Is it possible to still have air in the lines or could there be another problem. I do have suction at the brake booster and the new booster seems ok.
They need to be bleed again all four wheels but your vacuum pump may be bad since diesels don't have vacuum then have to have a pump, check that the booster one way check valve is good if you can blow thew it both ways it's bad, to bleed start from the wheel farthest away from the master cylinder pump the brakes 5 times and hold down then open the bleed valve keep doing this until you get clear fluid out of each wheel once you have done that if it is still mushy and you know you have vacuum re bleed with engine running this will help push more out with power assist. most like the hard brake pedal had to do with no vacuum check out the pump. You may also have to reset the 2 way check valve if you need help with this let me know.
Posted on May 28, 2009
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Posted on Jan 02, 2017
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