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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

Brake problems

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Old May 25, 2018 | 10:34 PM
  #1  
racerdon's Avatar
racerdon
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5th Wheeling
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Brake problems

Hello all. Tonight I had my 1997 F-250 Heavy Duty at my friends farm. I went to leave, and as I was backing down the ramp, I hit the brakes, and the pedal went to the floor. I went to pump it, but didn't get any pedal. I did manage to get it home,. but it wasn't easy. Once I got it into my drive way, I checked underneath to search for any signs of a leak, but I did not find anything around any of the wheels, or any fluid dripping off of the frame as in a line blowing out, but didn't find anything there either. So I looked under the hood, and the resevoir on the master cylender had a little (less than an inch) of fluid. My question is, how do I check or test to see if the master cylender went bad?
 
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Old May 26, 2018 | 06:12 AM
  #2  
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From: Waterloo, Iowa
Yikes. Well in broad terms, if it's not leaking at a wheel cylinder or (somewhere); it's the master cylinder for sure.
 
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Old May 26, 2018 | 06:14 AM
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tjc transport
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if there is less than one inch of fluid in the master there is a leak somewhere. chock the wheels to keep it from rolling, then fill the master cylinder and have someone step on the brake pedal while you inspect under the truck for the leak.
 
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Old May 26, 2018 | 07:41 AM
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Robert Long
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From: Ar
Could be leaking into the brake booster.
 
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Old May 26, 2018 | 08:23 AM
  #5  
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tjc transport
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From: Marlboro Mental Hospital.
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true, but that much fluid being missing will also leak out of the booster either into the engine bay, or inside the cab.
 
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Old May 26, 2018 | 06:48 PM
  #6  
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steveamann
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From: Paris
When it happened to me is was the master cylinder. No brakes at all.
 
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