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Brake failure my pedal is on the floor brakes not stopping the truck?

Tiny
POIPOIPOUNDER
  • MEMBER
  • 1999 FORD F-150
  • 2.0L
  • V8
  • 2WD
  • MANUAL
  • 100,000 MILES
Brake pedal goes to floor. Pumping doesn't work. Cylinder is full and not leaking. Brake Masters said brake pads good and no leaks.
Tuesday, June 18th, 2019 AT 11:05 AM

8 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon,

If the fluid is good and you have no pedal, most likely the master cylinder has failed.

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

If you open a bleeder, does fluid come out with the pedal depressed?

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

Roy
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Thursday, September 24th, 2020 AT 11:41 AM
Tiny
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I'm not able to do that. I'm not trusting Brake Masters answer because I can't afford to replace entire or rebuilt ABS as msgr is suggesting. Or he said bring title to him so he can dispose of truck.
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Thursday, September 24th, 2020 AT 11:41 AM
Tiny
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Thank you for quick reply. I'm doing some research. He says brake fluid is contaminated but the test he showed me, anyone could do as a ruse.
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Thursday, September 24th, 2020 AT 11:41 AM
Tiny
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  • MECHANIC
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Sounds like he wants the truck.

I would replace the master cylinder and bleed the lines of all air.

Is the gasket under the master cylinder swelled up?

Roy
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Thursday, September 24th, 2020 AT 11:41 AM
Tiny
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A bit.
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Thursday, September 24th, 2020 AT 11:41 AM
Tiny
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  • MECHANIC
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Good chance there is a petroleum product in the fluid. It has failed the seals in the master and possibly the calipers and the wheel cylinders.

Roy
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Thursday, September 24th, 2020 AT 11:41 AM
Tiny
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Thanks Roy! I went to a reliable salvage guy yesterday and he has several ABS for $100.00 vs $450.00 for rebuilt acquired by brake masters. He also has a good mechanic.
Thank you so much for your continued assistance and 'reassurance'. Have a blessed day!
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Thursday, September 24th, 2020 AT 11:41 AM
Tiny
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You are welcome.

Always glad to help.

Ry
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Thursday, September 24th, 2020 AT 11:41 AM

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