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post #1 of 5 (permalink) Old 07-13-08, 07:24 AM Thread Starter
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Exclamation Lost Brakes / Had accident

Lost my brakes on my superduty. Are there any known issues with booster pumps/power assist brakes failing? Pedal wne to the floor, no e brake, had to jam tranny in park. Who knows what damage was done. Almost crashed into another vehicle. Did damage to my truck and trailer I was towing. Has anyone ever heard of this? is Ford laible? suggestions?
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post #2 of 5 (permalink) Old 07-13-08, 07:50 AM
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Re: Lost Brakes / Had accident

I'm not positive, but I think when the booster fails, the pedal is hard. Usually when the pedal goes to the floor, you have a leak in the system. Have you checked the brake fluid? Master cylinder is another possibility.
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post #3 of 5 (permalink) Old 07-13-08, 09:28 AM Thread Starter
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Re: Lost Brakes / Had accident

Fluid level is fine, no visual sign of leaks...
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post #4 of 5 (permalink) Old 07-15-08, 08:02 PM
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Re: Lost Brakes / Had accident

Perhaps the vacuum system has a big leak? I'm not sure how the SD brakes are configured. Power brakes get there name from some sort of driving source. Just a thought.

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post #5 of 5 (permalink) Old 07-20-08, 03:12 PM
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Re: Lost Brakes / Had accident

I think if there was a bad vacuum leak the pedal would be hard to push but you would still have brakes. I would look at the master cylinder. Had a issue with my taurus with the pedal going to the floor on occasion, it was the master cylinder. Somehow the fluid pressure was bypassing within the MS but never leaked.
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