Sorry, but another brake pedal question

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56Steve

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I paid a mechanic to replace my brakes. He did not tweek them just gave the car back to me.
So far I have had to fix allot of things he did. Thanks to all of your help.

One more question: I am able to pull my brake pedal up almost 5 inches from where it sits in the normal position. It stops when the master cylinder rod stops. I did it by accident by catching my foot under it.
Should there be some kind of a stop arm to keep from pulling the brake pedal up that far, or is that the nature of this brake system?
Thank you in advance for any ideas.
Steve
 
Yes what exactly did he do. We'll need more details in order to help you trouble shoot
 
bled brakes and it does stop fine, I just don't understand why the brake pedal came up that far. and after I played with it it comes almost up to the dash bottom ,very strange!
 
bled brakes and it does stop fine, I just don't understand why the brake pedal came up that far. and after I played with it it comes almost up to the dash bottom ,very strange!
STOP!
That sounds like the pushrod is not captured in the M/C! Do not drive it until this is resolved. If the pushrod is truly not properly locating, this could be dangerous!
 
STOP!
That sounds like the pushrod is not captured in the M/C! Do not drive it until this is resolved. If the pushrod is truly not properly locating, this could be dangerous!

You mean as in the rod could miss the piston all together if it's coming out that far and having zero brakes all of a sudden?
 
Yeah IDK how it can find it's way back in. But if there is a booster on it, well there the pushrod is guided. However if it misses seating properly in the control valve, then a hard stop can break it, and then IDK what would happen.
I had a neighbor once with an old Ford Galaxie, that when he touched the brakes they came on full bore, slamming you forward hard. I traced it to a broken control valve.
 
What is weird it brakes fine, where I noticed a problem is when my shoe got caught up under my brake pedal and it brought it way forward, like up to the dash bottom?
 
On my 4 speed the brake pedal is held in check by the clip on the back of the master cylinder and also the brake light switch...68 B cuda
 
Yeah IDK how it can find it's way back in. But if there is a booster on it, well there the pushrod is guided. However if it misses seating properly in the control valve, then a hard stop can break it, and then IDK what would happen.
I had a neighbor once with an old Ford Galaxie, that when he touched the brakes they came on full bore, slamming you forward hard. I traced it to a broken control valve.

I had a Lincoln MK4 that did that, and it sucked.:D
Only way to get it to let go was to either wait quite awhile till the vacuum booster bled all the way down, or pull a vacuum line.
New booster fixed it.


What is weird it brakes fine, where I noticed a problem is when my shoe got caught up under my brake pedal and it brought it way forward, like up to the dash bottom?

Even so, it warrants a good look to find out why it happens and do whatever it takes to get it the way it is supposed to be.
Your brakes could be hanging by a thread, or it could just be something stupid and easy to solve.


On my 4 speed the brake pedal is held in check by the clip on the back of the master cylinder and also the brake light switch...68 B cuda

My Dart has both of those also.
Any way I can imagine 56 Steve's huge gap happening would make me unsettled.:D
 
The M/C pushrod is secured to the M/C piston by a thick, square "O" ring. It is not possible to pull the pedal back any farther when the M/C is at rest. The fact that you can means that something is very wrong. Do not go back to that mechanic for anything!
 
Come on guys
When the mechanic swapped the M/C the retaining clip/o-ring stayed in the old M/C and the new on didn't come with one

Slap a new on on there and call it good
 
There are 3 stops. The pedal coming up should be stopped by the brake lamp switch, though something is wrong if that is what stops it. The rod should be locked into the MC piston by the afore-mentioned rubber bushing. The MC piston should not be able to come out of the bore due to a clamped on stop, which is either a bolted on tab (usually temp for power brakes) or the dust bellows w/ sheet-metal flange. The later might be what post 15 refers to. Either way, it is a serious safety issue, and that mechanic should never be trusted again. Still waiting for photos.
 
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