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Posted by Ed Tavernier on Monday, March 30, 2009 at 22:43:21 :
I spent the better part of the afternoon bleeding the brakes on a 1997 Ford F350 7.3 navistar turbo diesel. Solid pedal with the engine off. However with the engine running the pedal would slowly drop to the floor. The booster does not show any evidence of a leak, all of the lines are tight, and after repeated pumping of all four brake lines no further evidence of any air. The MC was dissassembled after the above, and appears OK. I bench bled it and repeated all above...again. Solid when the engine is off, but with the engine running the pedal slowly goes to the floor....
Next? Any and all suggestions appreciated...
Eddie
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