Repeated parking brake failure |
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Steelyard Blues
Member Joined: 09 Oct. 2017 Location: Reno, NV Status: Offline Points: 1483 |
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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. |
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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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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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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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1- 1946 CJ2A
2- 1949 CJ3A |
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Steelyard Blues
Member Joined: 09 Oct. 2017 Location: Reno, NV Status: Offline Points: 1483 |
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Thanks for the suggestion.
Springs are in correct. Everything is still connected. Just the link pops off the lever socket. Micah
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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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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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1- 1946 CJ2A
2- 1949 CJ3A |
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Steelyard Blues
Member Joined: 09 Oct. 2017 Location: Reno, NV Status: Offline Points: 1483 |
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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
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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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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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Return spring attached to bracket on underside of tub?
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1- 1946 CJ2A
2- 1949 CJ3A |
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Steelyard Blues
Member Joined: 09 Oct. 2017 Location: Reno, NV Status: Offline Points: 1483 |
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Yes, cable is attached to mount on the motor as well as transmission crossmember.
Micah
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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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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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1- 1946 CJ2A
2- 1949 CJ3A |
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Steelyard Blues
Member Joined: 09 Oct. 2017 Location: Reno, NV Status: Offline Points: 1483 |
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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
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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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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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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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1- 1946 CJ2A
2- 1949 CJ3A |
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Steelyard Blues
Member Joined: 09 Oct. 2017 Location: Reno, NV Status: Offline Points: 1483 |
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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. |
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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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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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Is it coming apart at this joint?
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1- 1946 CJ2A
2- 1949 CJ3A |
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Steelyard Blues
Member Joined: 09 Oct. 2017 Location: Reno, NV Status: Offline Points: 1483 |
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That's the problem!!
Micah
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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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Steelyard Blues
Member Joined: 09 Oct. 2017 Location: Reno, NV Status: Offline Points: 1483 |
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Here is the wrong NOS lever I received. Anyone know what it goes to?
Micah |
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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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athawk11
Member Joined: 18 Jan. 2012 Location: Arvada,Colorado Status: Offline Points: 4145 |
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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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1- 1946 CJ2A
2- 1949 CJ3A |
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Rus Curtis
Member Joined: 25 Mar. 2010 Location: Alabama Status: Offline Points: 1733 |
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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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Rus Curtis
Alabama 1954 CJ3B Bantam T3-C |
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Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3633 |
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Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3633 |
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Yes, MC=M38
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