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07-11-2013, 06:03 PM | #1 |
Better late than never
Join Date: Dec 2001
Location: Columbus, IN
Posts: 324
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Help: Brake pedal going to the floor
Most of the time I have good brake pedal, but every now and then it will go straight to the floor and pumping doesn't bring the pedal up. Fluid is full and pads are ok, so is this probably a master cylinder problem? Thanks for the help.
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1970 C/10 SWB Stepside |
07-11-2013, 06:19 PM | #2 |
Proprietor of Dale's Corner
Join Date: Nov 2012
Location: Vacaville , CA
Posts: 16,220
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Re: Help: Brake pedal going to the floor
Yes probably the master
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"Some Days Chickens And Some Days Feathers" Dale XNGH ECV Sam Brannan 1004 R.I.P. 67ChevyRedneck R.I.P. Grumpy Old Man R.I.P. FleetsidePaul |
07-11-2013, 06:22 PM | #3 |
Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Help: Brake pedal going to the floor
I also agree with master cylinder being the problem. Don't use the truck until you replace it. It's a scary feeling when you suddenly lose brakes. Been there.
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68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
07-11-2013, 06:38 PM | #4 |
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Join Date: May 2012
Location: Anton, Texas
Posts: 2,364
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Re: Help: Brake pedal going to the floor
x 3 on the master cylinder .....
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07-11-2013, 07:02 PM | #5 |
Registered User
Join Date: Jun 2010
Location: San Diego Co.
Posts: 1,172
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Re: Help: Brake pedal going to the floor
x4....if you are not loosing fluid, it's really the only thing that it can be.
Just replaced one on another vehicle with these same symptoms....cured it. Side note: I was able to do this without bleeding the brakes in the traditional way. I just threaded the lines into the master cylinder (after bench bleeding, of course) barely hand tight. Then I had my daughter (12 years old) push the pedal to the floor and hold it there while I tightened up the lines (tighten, loosen, tighten, loosen, tighten....to make a good seal). She released the pedal. Then I topped off the m/c, and pushed on the pedal....good and firm it was! Pushing the pedal with the lines only hand tight effectively bled that bit of air from the system. These instructions came with the new m/c. Seemed so simple, and it was. I was thinking I would have to do a complete bleed, but it wasn't necessary.
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1972 Chevy C-10, SWB, Fleet, 350/350, PS, PB, HEI, mostly stock, Survivor. |
07-11-2013, 07:11 PM | #6 | |
Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Help: Brake pedal going to the floor
Quote:
That bleeding technique makes sense. Wish I had known to do this before. I'm so used to doing it the old way I just don't read instructions. I guess I need to.
__________________
68 GMC 250/3 speed Saginaw p/b p/s 69 Chevy 350/350 currently in pieces still lookin for a cab 06 Trailblazer I just want a vehicle that I can work on, that won't talk to me, leave error msgs or keep track of how I drive... |
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07-11-2013, 09:22 PM | #7 | |
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Join Date: Jun 2010
Location: San Diego Co.
Posts: 1,172
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Re: Help: Brake pedal going to the floor
Quote:
Trust me, it wasn't without complaint!!
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1972 Chevy C-10, SWB, Fleet, 350/350, PS, PB, HEI, mostly stock, Survivor. |
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07-11-2013, 07:05 PM | #8 |
Better late than never
Join Date: Dec 2001
Location: Columbus, IN
Posts: 324
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Re: Help: Brake pedal going to the floor
Thanks I appreciate the confirmation!
Posted via Mobile Device
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1970 C/10 SWB Stepside |
07-11-2013, 07:07 PM | #9 |
Better late than never
Join Date: Dec 2001
Location: Columbus, IN
Posts: 324
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Re: Help: Brake pedal going to the floor
Thanks Slik I will give that a try.
Posted via Mobile Device
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1970 C/10 SWB Stepside |
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