Omix Sector Shaft Safety Warning Fellows!!!!!!! |
Post Reply | Page <1 91011 |
Author | |
SE Kansas 46 CJ-2A
Member Sponsor Member x 3 Joined: 22 Jan. 2016 Location: S.E. Kansas Status: Offline Points: 3190 |
Post Options
Thanks(0)
|
I would also like to know what lubrication was used in the Ross box. This could be a factor in the failure. A file test failure on the pins would be indicative of poor manufacturing technique and even poorer quality control. A good file test would be no metal removed with a clean sharp file.
Edited by SE Kansas 46 CJ-2A - 21 Oct. 2021 at 10:51am |
|
46 CJ-2A #64462 "Ol' Red" (bought April 1969)(second owner)(12 V, 11" brakes, M-38 frame, MD Juan tub)
U.S. Coast Guard Chief Petty Officer(ret.) U.S. Army Vietnam veteran and damned proud of it. |
|
Bruce W
Member Joined: 29 July 2005 Location: Northeast Colorado Status: Offline Points: 9649 |
Post Options
Thanks(0)
|
When this was new, was the worm gear/shaft replaced as well, or has this been running on a worn worm?
BW
|
|
It is NOT a Jeep Willys! It is a Willys jeep.
Happy Trails! Good-bye, Good Luck, and May the Good Lord Take a Likin' to You! We Have Miles to Jeep, Before We Sleep. |
|
Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3654 |
Post Options
Thanks(0)
|
My comment about the pictures being
As the sector is rotated off center the pin on the leading side climbs the worm and the trailing pin contact drops lower. So the wear should be radial. (like in Bitz photo). The severe wear looked like the pins had been hit with a grinder, and the right pin has lines that go vertically to the tip, not radially. Incidentally, that's not one of the ones that was imported/distributed by OMIX.
Edited by Joe Friday - 22 Oct. 2021 at 7:54pm |
|
48willys
Member Joined: 22 June 2007 Location: sw/ virginia Status: Offline Points: 1340 |
Post Options
Thanks(0)
|
I was going back through this thread, someone on page 6 had the same pin wear on a shaft marked WAT.
|
|
1946 cj2a #28680
1948 chevy 3800 thriftmaster 1946-50's cj2a-3a farm jeep 1993 yj, aka the yj7 |
|
Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3654 |
Post Options
Thanks(0)
|
The wear on the WAT shaft on page 6 is similar but not as severe , and is what I described as radial, and normal.
|
|
TJo
Member Joined: 30 Aug. 2021 Location: Ohio Status: Offline Points: 16 |
Post Options
Thanks(0)
|
I just thought I’d post this to share what happened to me, didn’t know I was opening a can of worms here. The pictures are of the shaft just as I took it out of the jeep, kinda baffled me that anyone would think something here was “staged “. The worm gear I used was in good shape with no signs of wear at all so I thought it would be okay to reuse, as to lubrication I ran 75W-140 gear oil in the box and checked it periodically to keep it topped up. As to a file test, I’m not a metallurgist so the thought never occurred to me, it seems to me that the wear from a smooth worm gear rather proved that they haven’t been hardened properly. Just my amateur observation. It seems that others have had similar experiences, I noticed someone on page 4 posted pictures of a rather badly worn shaft that only had 500ish miles on it so I just thought I’d add my experience to maybe help someone else head off trouble.
Hope this clears everything up.
|
|
Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3654 |
Post Options
Thanks(0)
|
No problem. As Bruce W did a better job at, we're just trying to figure out the root cause.
Other than being rapid pin wear, in my opinion, yours doesn't have the same wear pattern as on page 4. Page 4 is what I expected from a 'soft' pin. Yours looks like , well, I don't know what it looks like. Overtightened? Flat towed? Tightsteer? Pure guesses.
|
|
TJo
Member Joined: 30 Aug. 2021 Location: Ohio Status: Offline Points: 16 |
Post Options
Thanks(0)
|
I did not use Tightsteer, I’ve never flat towed the jeep, I don’t believe I overtightened it but hey, maybe I did.
Hey just a thought, but maybe next time just ask me the conditions around the part instead of accusing me of something “fishy”. I just came on here to share a bad experience, I wasn’t trying to pull anything over. Kinda makes a guy just want to not bother.
|
|
Stev
Member Sponsor Member Joined: 27 July 2016 Location: Cincinnati Status: Offline Points: 2384 |
Post Options
Thanks(0)
|
TJo,
Thanks for posting the issue. It gives us something to look out for. I never see that kind of ware. I do see the ware on the bushings. My guess is the part was not hardened. Check the condition of the worm gear when you install the replacement one. IF you see anything odd please post a photo of it. |
|
Stev
1946 CJ2A Trail Jeep (The Saint), 1948 CJ2A Lefty Restored |
|
Bitz
Member Joined: 17 Dec. 2020 Location: MN Status: Offline Points: 275 |
Post Options
Thanks(0)
|
Hi TJo. Thanks for your info etc. it was and continues to be a very complex issue for such a simple set of parts. Maybe I am wrong but hope not. I don’t think the reference to fishy was being applied to you or your post, I am thinking something fishy is in ref to the damage so fast. Please continue to share and post as I sure gain insight from everyone’s perspective.
Bitz
|
|
Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3654 |
Post Options
Thanks(0)
|
I went back and changed my posts to 'perplexing'.
The pins or 'studs' are intended to be carburized and hardened to rockwell C scale hardness of 60 to a depth of .030 to .040. I suppose your example could have worn past that. The stud/pin has an included angle of 29 degrees with a breakover radius of .035 to .040, Yours appears to be worn more than .040 based on that entire radius missing. The normal wear pattern is not parallel or symmetrical ( like the shaft in your photo) due to the stud moving on an axis below the cam, and on a radius of 1.625 inches from the shaft connected to the pitman arm. I think Bruce was on the right track thinking it might not be the correct 12-14-12 cam, or badly worn. So I wasn't trying to insult you, I was trying to help, but I still find it 'perplexing' and won't lose any more sleep trying to figure it out. |
|
Oldpappy
Member Joined: 09 Apr. 2018 Location: Tennessee Status: Offline Points: 4904 |
Post Options
Thanks(0)
|
Tjo,
Try not to let your feelings get in the way of the tremendous knowledge base on this forum. I too have not seen a wear pattern like that on the sector pins, but I don't know as much about this stuff as others, not as much as Joe anyway. A lot of the import parts available now are simply not up to par. The pins on that sector may have been too soft, and may not have been cut at the proper angle. Didn't see whether your worm was an original, or a reproduction, but I have seen those cut wrong too. So, there are a lot of ways these things can go wrong.
|
|
If you can't get there in a Jeep you don't need to be there!
|
|
Tom in RI
Member Joined: 07 May 2009 Location: RI Status: Offline Points: 1126 |
Post Options
Thanks(0)
|
Doing a garage cleanup and found this with a bunch of M38 steering parts. I went through this full thread and dont see anything specific on this part.
Two things that may be alarms - is it really made in USA? And most have machined pins on the bach where these look peened. I probably purchased this 15 years ago and not from Omix. Any experiences or cross references to say if this is a good or bad part? Thanks |
|
Joe Friday
Moderator Group Sponsor Member x 2 Joined: 26 Dec. 2010 Location: Jeep Central Status: Offline Points: 3654 |
Post Options
Thanks(0)
|
Tom, I can't speak for the burrs on the shaft, but that appears to be an earlier crown part.
The omix part ran the shaft into the arm, and welded it on the back side. The correct construction was forged, and the smaller button where the adjusted contacts is a hardened insert.
|
|
Post Reply | Page <1 91011 |
Tweet |
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |