Brake pedal does not rise

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rickf
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Re: Brake pedal does not rise

Unread post by rickf » March 28th, 2021, 8:54 pm

Since it only happens when the clutch pedal is depressed I would guess that the clutch pedal rod is deformed somehow. Clean the bushings off very well and dry them and look for a wear spot, I will bet you find a shiny spot on one of those bushings that tells you that is where the interference is. Then take some fine sandpaper and sand that spot down a little bit. Giving yourself a little clearance will never be felt in the pedal. That is going to be a lot easier than trying to straighten the rod. I will go so far as to bet that you will find a shiny spot on one side and on the other side of the bushing it will be on the opposite side of the bushing, Top on one side and bottom on the other side for example. Clean these off a little bit with fine sandpaper and put a little oil on it and it should be fine.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: Brake pedal does not rise

Unread post by Mr. Recovery » March 28th, 2021, 9:04 pm

rupert's wrote:
March 28th, 2021, 6:50 pm
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 :evil: :evil: :evil:

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 :oops: :oops: :oops:

I have to take it apart again and check again. :twisted: :twisted: :twisted: :twisted: :twisted: :twisted:
I have my pedals out, Here are 2 photos of the spring area, if you need more let me know.
20210326_180747.jpg
20210326_180814.jpg

dan-2beers.jpg
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1960 M151 Run 1
1963 M151 Willys DoD 10-63 in Baltimore
1989 Alley Cat. "work in Progress"
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Hambone
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Re: Brake pedal does not rise

Unread post by Hambone » March 28th, 2021, 9:14 pm

Just lightly oil the bushings and shaft, heavy grease will make it more stiff, has your pedal return spring weakened? you could drill another hole and tighten it a little. As others have said, make sure the bushings are not worn.

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Re: Brake pedal does not rise

Unread post by rickf » March 29th, 2021, 7:40 am

Worn bushings on the brake pedal are not likely to cause a sticking pedal like he is describing, loose bushings on a brake pedal would just make it rattle, unless they were totally gone. Bushings that are too tight on the other hand can be a problem.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: Brake pedal does not rise

Unread post by m3a1 » March 29th, 2021, 11:29 am

Well, if the pedal assembly has passed inspection, it's time to begin looking down stream for other problems.

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Re: Brake pedal does not rise

Unread post by rupert's » March 29th, 2021, 6:32 pm

Mr. Recovery wrote:
March 28th, 2021, 9:04 pm
rupert's wrote:
March 28th, 2021, 6:50 pm
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 :evil: :evil: :evil:

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 :oops: :oops: :oops:

I have to take it apart again and check again. :twisted: :twisted: :twisted: :twisted: :twisted: :twisted:
I have my pedals out, Here are 2 photos of the spring area, if you need more let me know.

20210326_180747.jpg20210326_180814.jpg

dan-2beers.jpg
Thanks! I think everything is the same at a glance. This weekend I think I will take a day to continue with the pedals.
For now I think the accelerator pedal shaft and the two bushings are ok, I have to check the brake pedal and its bushings. For some reason they move free but when there is clutch pressure they move together. The logical thing would be that it is something twisted or some cap of the brake pedal is bad. In the weekend I hope to get rid of doubts, I keep you informed.

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Re: Brake pedal does not rise

Unread post by rupert's » April 4th, 2021, 3:48 am

the two brake pedal bushings do not move, do not rotate, maybe this is why ...
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Re: Brake pedal does not rise

Unread post by rickf » April 4th, 2021, 7:55 am

The bushings do not rotate in the pedal, they are fixed in the pedal and the shaft to bushing are the slip point. That dirty shaft could be a problem. Like has been said motor oil or very light grease, not chassis grease. Clean the shaft up with emery cloth or fine sandpaper.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: Brake pedal does not rise

Unread post by rupert's » April 4th, 2021, 8:11 am

rickf wrote:
April 4th, 2021, 7:55 am
The bushings do not rotate in the pedal, they are fixed in the pedal and the shaft to bushing are the slip point. That dirty shaft could be a problem. Like has been said motor oil or very light grease, not chassis grease. Clean the shaft up with emery cloth or fine sandpaper.
Solved !! That shaft was the culprit, it was dirty and had marks, the bushings were stuck to it.
I have also sanded it inside and out, removed several marks and now the shaft rotates well.
The piece that joins the clutch rod and the pedal was in a more forced position than necessary and this caused the whole set of pedals to twist a little, and it affected the brake pedal because it had more friction.

For now it is going well, I notice that the brake rises a little more forced with the clutch depressed but it rises well enough.
I have put wd40 oil on it, I hope it lasts a long time, the pedals are very uncomfortable to work with.
I keep you informed, greetings

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Re: Brake pedal does not rise

Unread post by rickf » April 4th, 2021, 4:51 pm

I am a little confused by that picture because on the right side should be the clutch pedal welded to the shaft. On the left side of the shaft is a hole to mount the ear that holds the clutch rod. How does your clutch pedal mount to that rod? Or is it there and the pic just makes it look like it isn't?

I keep looking at that pic and something just does not look right, like it is backwards. The clutch pedal should be to the left of the brake pedal. It has been a really long, hard day but I still remember where the clutch and brake are.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: Brake pedal does not rise

Unread post by rupert's » April 4th, 2021, 6:41 pm

hahaha Rickf hard days do not allow you to see clearly! What happens to you that you have confused a piece of shaft that is seen on the left side of the image and you have thought that it is the connecting piece for the ear of the clutch rod ... then you think that it is the other way around.

The image is fine, what happens that what you are seeing is the axis of the brake pedal.
The clutch pedal with its shaft and its two bushings go inside this brake shaft and at the end it has a square piece to screw in the clutch rod.
But it is not seen in the image because it is not. https://www.globeworks.eu/clutch-pedal-Ford-Mutt-M151

This is what you see...
imagen pedal freno.jpg
Un saludo
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Re: Brake pedal does not rise

Unread post by rickf » April 4th, 2021, 8:16 pm

Well, the spring should be on the same side as the clutch pedal and looking at your pic the spring is on the side that the clutch arm bolts too. This would be backwards. Maybe this is part of the problem? I will look at the five sets I have hanging in the garage tomorrow to make sure I am giving accurate info.
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: Brake pedal does not rise

Unread post by rupert's » April 5th, 2021, 8:58 am

Oh my! 5 sets of pedals !! I'm sure you have an assortment of spare parts

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Re: Brake pedal does not rise

Unread post by rickf » April 5th, 2021, 6:07 pm

I bought out a collector/ modifiers inventory right before Thanksgiving. I have a several tons of stuff, literally. There is a thread about some of it on here somewhere.

Here is the thread.

viewtopic.php?f=2&t=12853
1964 M151A1
1984 M1008
1967 M416
04/1952 M100
12/1952 M100- Departed
AN/TSQ-114A Trailblazer- Gone

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Re: Brake pedal does not rise

Unread post by rupert's » April 7th, 2021, 6:58 pm

Many pieces! you have a treasure at home :) :)

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