Brake pedal won't spring back?

[BrianV]

I am getting close to getting
My truck on the road but keep running into little gremlins

After I press the brake pedal it will not
Spring back It actually keeps the brakes locked up
But if I reach down and pull it back up they release right away

I have removed the return spring and compared it to another one I had and the tension seems to be the same as well I have lined the entire
Pedal assemble and everything works freely

And suggestions or comments would be helpful

The truck is a 72 with power brakes

Thanks
Brian
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[hayhauler71]

If this is happening with the truck running disconect the vacuum booster start it up and see if the pedal releases

[BrianV]

It does it running or not and disconnecting the booster doesn't seem to
Make any difference

All
I can think is maybe the linkage at the booster is bound up somehow but I can not
Really see that being a problem I luned all of that linkage before I installed the booster and master cylinder on the firewall
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[68gmsee]

I would just disconnect the brake push rod link inside the firewall and see if pedal work properly. If it does, you have a bind in the booster. You'll probably have to remove it and see if you can detect where it is.

If you look at a booster image diagram you can see the rear part has a spring and a lot of parts that can bind. You might be able to lube them.

[BrianV]

Yea that's kinda where I figured I was heading but wanted to see if anyone had any tricks I didn't know of

The pedal works fine without the brake rod hooked to it

Thanks for the input do far guys
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[roscoe00]

i had the same problem when i reassembled my truck and i found it was the shouldered bolt that connectes the arm to the pedel and it has a clip on the end, it was too tight and making the pedel stay applied. i used a tripple lock nut and left it slightly loose and put made sure the clip was on the end of the bolt.

[BrianV]

I will have to check that I have a regular bolt with a nylock that could be the issue

Thanks for he info
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[special-K]

When this happens I loosen the 4 nuts on the firewall to see what that does. But,it's usually the booster is seizing up at the back side as mentioned. Do your brake lights stay on until you pull you pedal back?

[BrianV]

I will have to check that out and see if anything is bound up at the back of the booster

I think I am using the wrong bolt for the brake pedal as well so I am gonna try that before I take the booster back off the firewall

I appreciate all of the comments and I'll keeP you posted on what is causing the problem

Thanks guys
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[Undone]

Spring inside brake booster broke!