Brake Pedal Wobble and bushings... |
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Jeff_Davis
Member Joined: 15 July 2012 Location: Argentina & FL Status: Offline Points: 551 |
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Posted: 01 Dec. 2015 at 1:57pm |
Now that my CJ2A is running again, I have noted how bad the brake pedal play is at the support shaft. When I assembled it, I saw the oval shape the brake pedal casting had worn to, over the years. I used some shimming material and took some of the slop out of the pedal, but it isn't enough.
The shaft appears OK, with only slight wear, a testament to the metal hardening process of 70 years ago!! In the W-O 1965 Service Manual (pg. 156) they speak of a "pedal slack adjuster kit". I assume this is some sort of bushing fitted to the cast iron pedal?? Is there some way to fit a bushing to the pedal to save it? Is there a part number and source for such a bushing? Anybody done this fix? I can buy a reproduction pedal, but being in Argentina means putting a big heavy part in my luggage to get it here from the USA... not the best solution for me. I searched, but couldn't find anything specific in the forum, but I am sure this must have been addressed before? thanks, Jeff
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Jeff
1947 Willys CJ2A Las Flores, Provinca de Buenos Aires, Argentina 1951 Willys M38 Flightline jeep (Southeast Florida) 1954 M-100 USMC Trailer 1954 FORD F-100 parts chaser, 292 V8 Y-Block |
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flatfender47
Member Sponsor Member Joined: 09 Jan. 2006 Location: Riverside CA Status: Online Points: 645 |
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tumbleweed
Member Joined: 31 Jan. 2011 Location: Bedford, Texas Status: Offline Points: 651 |
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Jeff,
I have had both my brake and clutch pedal machined oversize and bushings installed to eliminate wobble. If you have a local machine shop available that you trust, take your clutch/brake shaft and both pedals to them so they can make an accurate fit. Hope this helps
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49 CJ3A - Smokey
53 Willys Wagon - Wylie |
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Jeff_Davis
Member Joined: 15 July 2012 Location: Argentina & FL Status: Offline Points: 551 |
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Flatfender, that is a great link on the Slack Adjuster Kit. But without the two proprietary ends, I think it will be tough to duplicate.
Tumble, I am contemplating the machine shop approach. Did you use off the shelf bronze bushings, or did the shop source them?
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Jeff
1947 Willys CJ2A Las Flores, Provinca de Buenos Aires, Argentina 1951 Willys M38 Flightline jeep (Southeast Florida) 1954 M-100 USMC Trailer 1954 FORD F-100 parts chaser, 292 V8 Y-Block |
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pjensen641
Member Joined: 21 June 2014 Location: United States Status: Offline Points: 690 |
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Get ready for some redneck machining here. This is what I did. I "machined" out my brake pedal and installed an "Oilite" bushing. I got mine locally, but Mcmaster Carr has them too. The bushing was a 1" ID X 1"long. OD was 1 1/8". You will see that I should have used a 1 1/4" long bushing.
First, I checked a straight bur in to my benchtop drill press. Then I raised the bed while holding the pedal face flat against it and preceded to make circular motions against the burr to remove material. All the while, I made sure to keep constant speed and pressure on my circular motions. Every few minutes I would stop and measure the diameter in several places to see how I was doing and if I was getting out-of-round. It took about half an hour as I recall. Then press the bushing in with a mandrel and drill a small grease port concentric with the old one. It works great. If it ever wears out again, I will install a wider one.
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a4cj2a77
Member Sponsor Member Joined: 03 Sep. 2012 Location: Seal Beach Ca. Status: Offline Points: 566 |
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That looks pretty darn good to me for machining by hand, better than I could do. bushing looks to fit well
Phil
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Jeff_Davis
Member Joined: 15 July 2012 Location: Argentina & FL Status: Offline Points: 551 |
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Wow, that's a good solution, pjensen. And I too am impressed with your hand machining.
Did you drill the grease hole before or after pressing it in? I will give this a go. Thanks Jeff
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Jeff
1947 Willys CJ2A Las Flores, Provinca de Buenos Aires, Argentina 1951 Willys M38 Flightline jeep (Southeast Florida) 1954 M-100 USMC Trailer 1954 FORD F-100 parts chaser, 292 V8 Y-Block |
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pjensen641
Member Joined: 21 June 2014 Location: United States Status: Offline Points: 690 |
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I drilled the grease hole after. Its smaller than the threaded zerk port. I was afraid I might not get it aligned if I drilled it before.
The Oilite bushings are pretty forgiving. They are porus bronze with oil impregnation, fairly soft. The Burr left a bit of a rough surface on the inside. I THINK, I went after it with a small sanding drum to finish up. Once I was getting nearly to size, I would sand a little and check to see if I could start the bushing in. Once I was able to start the bushing in, and it felt like I could press it all the way in without seizing up, I went for it. I am not sure how much was luck, and how much was skill honestly . I recall being very please when it pressed in with just the right amount of force.
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cpt logger
Member Joined: 23 Sep. 2012 Location: Western Colorad Status: Offline Points: 3022 |
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pjensen, Why do you say that you should have gone with a larger OD on the bushing? Did the bore not clean up? Inquiring minds want to know.
BTW, Good "Redneck", or is it "Reddnek", engineering! This looks great. |
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pjensen641
Member Joined: 21 June 2014 Location: United States Status: Offline Points: 690 |
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The bore was fine, and I think you would not want to go to 1 1/4"OD. The wall would get too thin.
It was the length of the bushing that could have been larger. You can see that the pedal bore is wider than my bushing.
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cpt logger
Member Joined: 23 Sep. 2012 Location: Western Colorad Status: Offline Points: 3022 |
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Oops, on rereading the post, you do say that you would have gong longer, not bigger OD. My mistake, sorry.
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Jeff_Davis
Member Joined: 15 July 2012 Location: Argentina & FL Status: Offline Points: 551 |
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Measure twice, buy once!
Glad I get to do it after all the shade tree engineerin' is done. Jeff
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Jeff
1947 Willys CJ2A Las Flores, Provinca de Buenos Aires, Argentina 1951 Willys M38 Flightline jeep (Southeast Florida) 1954 M-100 USMC Trailer 1954 FORD F-100 parts chaser, 292 V8 Y-Block |
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wheelie
Member Sponsor Member Joined: 25 Jan. 2011 Location: red lion. pa Status: Offline Points: 814 |
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Not sure how this would work. Shown is a 1 1/4 bit but, you get the idea. Just a thought. carry on. |
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7923 |
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If you want to see how insane you can get upgrading the clutch and brake pedal pivot area go to The bottom of page three of my Blog on building Chug A Lug in the Projects section here:
To many photos and words to duplicate But here is the finished assembly |
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962 |
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pjensen641
Member Joined: 21 June 2014 Location: United States Status: Offline Points: 690 |
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Because of my crummy little drill press, I could not slow down far enough to use something like that. I also seem to have terrible luck with bits grabbing too aggressively when I am trying to just take a small amount. Lastly, I think drills tend to take just a little more material than the diameter, so I was afraid I might go over the limit and not get a pres fit. If I had a good drill press, I probably would have at least tried going in a little bit and checked the resultant diameter. Maybe someone will report back with success! I did price out a reamer....holy crud. Not something I would want to buy for just one job! I would have had the speed issue as well again though.
Edited by pjensen641 - 02 Dec. 2015 at 3:52am |
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ralf
Member Sponsor Member x 2 Joined: 06 May 2008 Location: Fayetteville WV Status: Offline Points: 4861 |
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Insane is right! What beautiful work.
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1947 CJ2A
1948 CJ2A 1953 Ford NAA Golden Jubilee Tractor 1941 J-3 Cub 1957 Farmall Cub Low Boy tractor 1942 Clarktor WW2 tug |
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Jeff_Davis
Member Joined: 15 July 2012 Location: Argentina & FL Status: Offline Points: 551 |
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OK, Mark, you win! Damn, that is nice work... certainly too nice for my jeep.
Are those Oilite washers you made to act as spacer/washers on the pedals, or are they a McMaster Carr item?? Jeff
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Jeff
1947 Willys CJ2A Las Flores, Provinca de Buenos Aires, Argentina 1951 Willys M38 Flightline jeep (Southeast Florida) 1954 M-100 USMC Trailer 1954 FORD F-100 parts chaser, 292 V8 Y-Block |
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7923 |
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Jeff go to my Project thread on Chug A Lug and starting on the bottom of page 3 should be all the details. But yes if it looks like Oilite then it is. Also the narrow bushing with the two washers on either side (where the shaft brace attaches to the new Master Cylinder mount is also Oilite and everything has zerts to be greased.
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962 |
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