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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

No Breaking!

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Old Jun 24, 2011 | 04:58 PM
  #1  
F150Adam's Avatar
F150Adam
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No Breaking!

I have a 1999 F150, I am recently having trouble with the breaking system. I have not had the breaks looked at, but they are still in good condition. The trouble I am having is that my breaks have gone soft. They now make a shhh noise when I press on them and bottom out, I have not found any leaks on the system, and I also don't see where any air could get in. I am worried it may be the master cylinder seal, but I wanted some other thoughts before I started in on that.
 
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Old Jun 24, 2011 | 06:01 PM
  #2  
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Volvo92906
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From: Toledo, Ohio
Im kinda thinking master cylinder. This is, of course, after clarifying you have no leaks or broken lines elsewhere.
 
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Old Jun 24, 2011 | 06:05 PM
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cj06
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From: CASA GRANDE AZ
your master cylinder is shot , and if you are hearing any air then you booster is leaking also ! replace both and you should be fine !
 
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