Brake pedal does not rise

[rupert's]

Once again, here I am looking for information and opinions

Last weekend I went for the first time for a ride in the mutt, I have to try it before the inspection for the license plate, in total I did 13km of pure happiness !!! But ... it will not be all good haha ​​I have several things to improve but above all I am worried about the brake pedal.

I'm driving, I step on the brake and the pedal does not go all the way up, it stays halfway, and the car is a bit slowed down, so I put my foot under it and pull up and everything goes well, this happens whenever I step on the brake whether you are walking or standing.

For providing information about the entire brake system ...
In the restoration I have put the new master cylinder, the 4 new wheel cylinders, the 4 new sleeves and a section of copper tubing.
The 8 brake shoes are new and are correctly approximated to the drum.

Do you know these symptoms? Could it be the springs of the brake shoes? Maybe the copper stretch can be to blame?
The circuit is purged, maybe it has air left?

[rickf]

I am guessing you did not hook up the return spring on the pedal. I will get a picture of it tomorrow if no one here gets one.

[rupert's]

Yes! The prison spring is in place, if you think this is what I can try to give it another turn ...

[muttguru]

Rupert's....

1. You should not use copper tubing in the brake system.

2. If you have used "new" old stock flexible hoses on the brake system, you should note that many of these hoses have deteriorated over time (even without use) and the hose becomes restricted internally.
The force of pressing down on the pedal allows some brake fluid to pass through the hose, but the return springs at the brake shoes end are not strong enough to force the brake fluid back to the master cylinder. Check out the hose(s) and renew as necessary, along with removing the copper sections of the tubing and replacing the copper with steel.

Ken

[rickf]

Ken, I think you will find the tubing used was copper/nickel. It is a common brake line material. I agree with the old stock brake lines but he said when he pulled the pedal up with his foot all was well, if the line was collapsed it would not have changed. The return spring on the shaft should return the pedal on it's own but not with more force than it takes to push it down with one finger when disconnected from the master cylinder. There should not be any resistance in the master cylinder to the return.

https://shop.advanceautoparts.com/p/nic ... lsrc=aw.ds

[Horst]

I had the very same problem. It is simply too much friction in the pedal assembly. You have disassembled and cleaned it and replaced that bushing. But at the end, did the brake pedal move smoothly with no friction at all? The return spring should have no problem to pull the pedal back, but if there is some friction, it will not

[rupert's]

Hello everyone!
Horst! the pedal was moving completely free when I mounted it, I am wondering if the spring has the turns it has to have or maybe I gave it one turn less.
Rickf, what you said is true, the problem is that the pedal does not go up by itself, if I force it to go up, everything works fine.
Muttguru, the sleeves are new, I don't think they are NOS and they are not leaking, I understand that it may be the fault of the copper tubing, but I will try to rule out other options first.

This weekend I am going to check that the pedal moves freely and I am going to try to give it another turn so that it has more pressure, if after this it remains the same I will raise the wheels to check if the rear brakes are locked, or those in front or 4, if only the ones in the back are blocked, it will be the fault of the copper pipe, because the back circuit is where the copper pipe is.
I keep you informed, once again, thanks for giving me a cable

[rupert's]

It seems that the whole problem is in the pedals, when I step on the clutch and the brake penalty at the same time, the brake penalty does not go up until the clutch rises

If I only step on the brake pedal, in that case if it rises, that is, if the clutch is depressed, the brake does not rise by itself, if the clutch is up, the brake rises by itself.

It seems that it is a greasing problem but I do not understand it because when I mount the pedals I leave everything very very greasy.
I will have to disassemble the pedals to grease

[Horst]

as you know there are bronze bushings in the cluster. They don't need grease but I think you should put some oil on them. I think there is some misalignment in the cluster and as such no free movement in some cases. Is everything straight or can you see some bends somewhere?

[m3a1]

As has been suggested, you may have a bushing going bad.

When you remove the assembly, remove it as a unit with the master cylinder in place.

Make sure you look over the Technical Manual before doing this job. Removing and replacing the unit is far easier to accomplish after looking the technical drawings over.

Don't forget the long bolt right behind the face of the dash panel as it is very easy bolt to overlook.

Cheers,
TJ

[Mark]

If i remember right, 2 bolts holds the pedal assembly to the body?

[Horst]

Believe 4. But it doesn’t matter, he had removed the cluster already in the first place

[rickf]

Are you counting the two bolts angled forward into the cowl? And I think there are four going up. I would have to look at the sets I have hanging for sale.

[rupert's]

The set of the two pedals is held by 4 screws from the hood and one that is in the dashboard area.

I have been all afternoon with this problem and I have not been able to solve it, I have finished late and pissed

It looks awesome. The pedals alone turn perfect but when I step on the clutch and then the brake, the brake is down and the solo does not go up.
He has a new cap because the one he had was broken, the other caps are fine.

This afternoon I took the pedal set apart, checked it and everything seemed fine. nothing looks crooked. I have only seen that a weld on the clutch pedal seemed to modify the trajectory and this could lever against the other, I have filed it down thinking that that was the problem, I have put it back in the car, and that was not the problem, being and at 10 at night I have left it for another weekend

I have to take it apart again and check again.

[Surveyor]

Before you do you might want to take a few good pictures and post just to see if anyone notices anything out of place.