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Repeated parking brake failure

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Steelyard Blues View Drop Down
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    Posted: 06 Oct. 2020 at 10:28pm

Two years ago, I cleaned all the 90w out, put new shoes and springs in. She worked great. At the beginning of the year, she suddenly stopped working. I pulled it apart, anyone who has been in there knows this is a pain in the …. So, the link popped off the lever. I reattached and everything was good. Then it did it again. Thinking the link was bad, I ordered a new link along with the spring and shoe pivot arm. Back together, she worked fine, for a short time. Then, the same thing. Apart it comes. This time, I notice the rivet holding the tab on the shoe pivot is lose. I try to hammer it tight, with little success. I really didn’t want to take the backing plate off. I put it all back together and try to tighten down the spring tension on the link to the arm thinking this was the issue. All back together and, with the first yank, it falls apart again. I noticed the arm had some excessive play where it attached to the stud. Since you cannot get the arm off without the backing plate backing plate being removed, I figured the bronze bushing was missing allowing the arm to rock and pop of the link. This all happened in the first three months of the year. I tracked down a NOS arm and found someone who said they had a NOS backing plate. I figured the play in the pivot tab rivet was also part of the problem. I waited for months for them to track down the backing plate and they could not find it.

Wanting to hit some trails next week and tired of not having the parking brake, I decided to tackle the problem once again. I took the backing plate off and attempted to hammer down the rivet. I ended up making a mess of it and the tab. So, I MIG welded it. The NOS arm was not the right one. I pushed out the bushing and installed it on the old arm. Back on the stud, the excessive play was still there. Consulting the parts book, I realized that there was supposed to be a flat washer under the nut to take up the play. Well, silly me for not looking at this long ago to realize somewhere along the line this washer was not reinstalled. All fluids back in with everything back together, she appears to work, so far. I cringe every time I pull this apart worried that I will tear the output seal. So far, leak free.

Well, that lasted one drive. Today, she popped off the link at the socket end of the lever. I'm open to suggestions here. The only thing I can think of is excessive wear in the socket. I don't understand how it went from working perfectly well to repeated failure. 

1947 CJ2A 106327, Engine J109205, Tub 97077. Luzon Red

https://www.thecj2apage.com/forums/steelyard-blues_topic41024_post397981.html?KW=micah+movie#397981

1965 Johnson Furnace Company M416 #6-1577
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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 2:49am
One thing that can cause the system to come apart is not capturing the shoe retainer springs as shown in the photo.



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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steelyard Blues Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 2:55am
Thanks for the suggestion.

Springs are in correct. Everything is still connected. Just the link pops off the lever socket. 

Micah
1947 CJ2A 106327, Engine J109205, Tub 97077. Luzon Red

https://www.thecj2apage.com/forums/steelyard-blues_topic41024_post397981.html?KW=micah+movie#397981

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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 3:16pm
Is the link assembled as shown?

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steelyard Blues Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 3:51pm
Thanks for the close up.

Yes, exactly like I assembled it when it worked for over a year and each subsequent failure.

This is why I am completely baffled as to the repeated failure. I'm wondering if it is the socket on the lever. I wish the NOS one I purchased was correct. I'm going to see if I can track down the correct one. 

Micah
1947 CJ2A 106327, Engine J109205, Tub 97077. Luzon Red

https://www.thecj2apage.com/forums/steelyard-blues_topic41024_post397981.html?KW=micah+movie#397981

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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 3:57pm
Return spring attached to bracket on underside of tub?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steelyard Blues Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 4:00pm
Yes, cable is attached to mount on the motor as well as transmission crossmember. 

Micah
1947 CJ2A 106327, Engine J109205, Tub 97077. Luzon Red

https://www.thecj2apage.com/forums/steelyard-blues_topic41024_post397981.html?KW=micah+movie#397981

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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 4:08pm

Couple extra shots.  Note the positioning ridge on the pin…

 

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steelyard Blues Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 4:29pm
Thanks again for the photos. 

I thought the original rod, spring and cam lever might have been the issue. I replaced them with reproductions with my third attempted repair.

All are assembled correctly including the positioning of the tabs on the cam lever end. The problem has never been on this end of the link. It is the attachment to the operating lever (#22 A-17254) that has been the point of failure. 

Operating lever was correctly adjusted to the 3/32 distance from the backing plate. 

I tried to reattach it through the access holes in the drum. I just could not get it back into the socket. 

Micah
1947 CJ2A 106327, Engine J109205, Tub 97077. Luzon Red

https://www.thecj2apage.com/forums/steelyard-blues_topic41024_post397981.html?KW=micah+movie#397981

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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 6:41pm
I'm sorry Micah, I was referring to the return spring, not the control cable connections.  I don't have a good picture of the spring.

He is a picture of the lever assembly in front of the brake drum.  The other end of the spring in the photo is attached to another wire link...that is attached to a bracket on the rear hat channel of the tub.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steelyard Blues Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 10:43pm
I have all the spring return pieces. A little different than your set up. 

I looked at some pictures from the very first time I took it apart. I'm the idiot who did not put the washer back. But it still worked for over a year like this. 

Micah





I thought I would make it more challenging by posting them up side down. Evil Smile

1947 CJ2A 106327, Engine J109205, Tub 97077. Luzon Red

https://www.thecj2apage.com/forums/steelyard-blues_topic41024_post397981.html?KW=micah+movie#397981

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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct. 2020 at 11:29pm
Is it coming apart at this joint?


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steelyard Blues Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct. 2020 at 12:00am
That's the problem!!

Micah
1947 CJ2A 106327, Engine J109205, Tub 97077. Luzon Red

https://www.thecj2apage.com/forums/steelyard-blues_topic41024_post397981.html?KW=micah+movie#397981

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Steelyard Blues Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct. 2020 at 12:05am
Here is the wrong NOS lever I received. Anyone know what it goes to?

Micah


1947 CJ2A 106327, Engine J109205, Tub 97077. Luzon Red

https://www.thecj2apage.com/forums/steelyard-blues_topic41024_post397981.html?KW=micah+movie#397981

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Post Options Post Options   Thanks (0) Thanks(0)   Quote athawk11 Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct. 2020 at 1:48pm
My stuff seems to fit tight at this joint.  The little spring is quite powerful.  Perhaps your spring has weakened.  If it's a reproduction, maybe it's not up to the task..?

On my spare stuff, I have to whip that assembly around pretty good to get it to come apart.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rus Curtis Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct. 2020 at 4:00pm
Originally posted by Steelyard Blues Steelyard Blues wrote:

Here is the wrong NOS lever I received. Anyone know what it goes to?

Micah




Maybe.  There was a post back when our 3B Forum was on Tapatalk.  Charlie posted an image of 3  different arms.  I'm hoping I can copy the image here vs. using a link back to Tapatalk:


The arm you have looks very similar to the M38 arm in the photo.  I had the longer arm and needed the short one labeled for "2A - early 3B" jeeps.  

If that's the case, not only would your arm angle be wrong but as pointed out so far, could your cup (the other end from the cable that connects to the spring on that internal link be shaped wrong? (causing it to pop off).

As much trouble as I had with connecting the longer arm, I wonder what could be happening with this arm and your cable.   So many questions. 


It seems y'all are narrowing the focus and will get to the issue soon.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joe Friday Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct. 2020 at 5:01pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joe Friday Quote  Post ReplyReply Direct Link To This Post Posted: 08 Oct. 2020 at 5:02pm
Yes, MC=M38
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