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Brake pedal going to floor 

 

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 Post subject: Brake pedal going to floor
Posted: Sat Sep 17, 2005 7:19 pm 
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Guys,

Got a small problem with the brakes. The car stops well, but I am worried as the pedal was very firm the day before.

I have checked everything and there are no leaks and the level is ok, but yesterday the brake pedal went almost to the floor.

I do have a fault with the abs, I think one of the sensors is shot, but that wouldn't cause this problem.

Has anyone ever had an internal leak in the master cyl?

Chris

 

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 Post subject: Re: Brake pedal going to floor
Posted: Sat Sep 17, 2005 9:46 pm 
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TS50EB wrote:
Guys,

Got a small problem with the brakes. The car stops well, but I am worried as the pedal was very firm the day before.

I have checked everything and there are no leaks and the level is ok, but yesterday the brake pedal went almost to the floor.

I do have a fault with the abs, I think one of the sensors is shot, but that wouldn't cause this problem.

Has anyone ever had an internal leak in the master cyl?

Chris


master cylinder seals sound like the problem

 

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Posted: Sat Sep 17, 2005 10:52 pm 
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Put your foot on the pedal push down, then start the car, if the pedal sinks, yuor booster is fine, if the pedal dont move, your booster is rooted,
if its fine, you air in your lines, bleed em, all the above is valid, if your not losing any fluid. I would think thatif the seals on the pistions in the m/cyl were rooted, you would have leakage, out the end of the m/cyl.
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Posted: Sun Sep 18, 2005 12:23 am 
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Thanks guys,

I will try your suggestion bowsaw re the booster and master cyl, but I doubt the fluid has air in it as the brakes had new fluid pumped thru till clear about 1 month ago, just before blue slip and there are no leaks anywhere so I'm thinking internal leak.

 

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Posted: Sun Sep 18, 2005 8:59 am 
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Internal, my understanding is that if it leaks past the piston seals in m/cyl it will be a visible leak
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Posted: Sun Sep 18, 2005 2:15 pm 
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It would, but not if there was 3 seals, one to pressurise the front brakes section, one for the rear brakes, and one at the back to stop it leaking out the back of the master cyl, and it is leaking between the front and rear sections.

I will need to have a look at the ford workshop manual, hopefully there is an exploded view.

Will let you know what I find out.

 

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"TS50EB" Member 300 on FORDMODS v1.1 Rejoined 6-11-2004

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Posted: Sun Sep 18, 2005 10:49 pm 
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hmmm odd problem there mate
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Posted: Mon Sep 19, 2005 11:31 am 
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TS50EB wrote:
It would, but not if there was 3 seals, one to pressurise the front brakes section, one for the rear brakes, and one at the back to stop it leaking out the back of the master cyl, and it is leaking between the front and rear sections.

I will need to have a look at the ford workshop manual, hopefully there is an exploded view.

Will let you know what I find out.


It is possible that it is bypassing inside the master cylinder.

There is a good exploded view in the gregorys.

 

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Posted: Mon Sep 19, 2005 10:17 pm 
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Not sure what is going on, but also had a talk to a mech today, low and behold on the way to Spiders place it seemed to fix itself.

I will still be looking into it, I don't want to loose the brakes altogether.

Cheers for the help guys.

 

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"TS50EB" Member 300 on FORDMODS v1.1 Rejoined 6-11-2004

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