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03-12-2020, 06:48 PM | #21 | |
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Re: Timken Throw out bearings
Quote:
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03-12-2020, 06:52 PM | #22 |
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Re: Timken Throw out bearings
" However, in order to minimize any defective bearings reaching our customers, we inspect and test rotate EVERY SINGLE BEARING before it is allowed to go out the door to a customer."
This is what a good retailer does.. Well done to you Mac.
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03-13-2020, 08:58 AM | #23 |
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Re: Timken Throw out bearings
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03-13-2020, 09:12 AM | #24 |
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Re: Timken Throw out bearings
It's simple.... Just take heed in the advice Mac VanPelt has offered. If there is a problem, you can most always feel it with your hands.
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03-13-2020, 03:48 PM | #25 | |
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Re: Timken Throw out bearings
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I've got several different TO bearings , new. Ive found that there IS a difference to the feel of one from another and wondered...WHY ? Only thing that comes to mind, is the TYPE OF GREASE and THE GREASE PACKING process used...and how OLD is grease. Whereas, one will spin 'too easily', another will turn with resistance. Must be a difference in preference of grade of grease used, IMO, or whether packed right with enough grease at all ! Some time back on this site/subject, one of the older experience guys showed a process whereby he re-packed old and / or loose feeling TO bearings. As long as they did not show signs of being worn...i.e.- dirt, noises, etc, I've used his method on the NEW loose TO bearing and it worked. As to what lube a guy used, that would be your choice. Mac, do you know of this 'fix' or have you ever used it? Last edited by hardtimes; 03-13-2020 at 03:51 PM. Reason: ....... |
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03-13-2020, 03:58 PM | #26 | |
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Re: Timken Throw out bearings
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with time. Any petrochemical experts here to give their input ? |
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03-13-2020, 04:13 PM | #27 |
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Re: Timken Throw out bearings
The older bearings would have a cosmoline packed or smeared on the bearings, races, what have you.
It needs to be cleaned off. Using mineral spirits, break clean...... Then repack the bearings. Newer bearings seem to have an oil type preservative to prevent rust. I tend to clean it off and repack with your choice of grease. |
03-13-2020, 05:00 PM | #28 |
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Re: Timken Throw out bearings
I don’t know what specific grease is used in the current National brand release bearings. I can’t say that I’ve had a new release bearing that ever felt loose out of the box. They all feel snug and full of whatever grease it is that they use......except the random defective. Those were clearly too tight and could barely be turned by my hand.
The tip for refilling/repacking a release bearing came from our good friend Rumbleseat (the late Paul Garrigan) who wrote out his procedure in the “tips” notes from years ago. I respect his experience and knowledge about all things flathead, but he and I disagreed on this one. If you were trying to repack a new bearing, by drilling a little hole in the side to inject more grease, you were going to most likely introduce small particles of metal shavings inside the bearing no matter how carefully tried to capture them from the drilling process. Then assuming you were successful in this operation, on a used bearing that has become loose or is rattling, how much life have you really added to the worn bearing by simply adding grease.....regardless of how wonderful the new lubricant is. Given that getting access to the release bearing on our old Fords with enclosed drive lines is a very involved process, I could never justify “rehabbing “ a used bearing for its continued usage. Let’s drift back to the little hole that was drilled into the bearing shell.....and allow for the strong possibility that some bits of steel fell into the bearing during that process. How long do you think the bearing will last? As for using an NOS release bearing that was manufactured 10, 20, 30 or more years ago, I suspect the original grease may have hardened enough to question its use today. Plus these are essentially sealed bearings without any means of flushing and refilling them. Any of the very old NOS or NORS release bearings I’ve handled were nearly impossible to rotate by hand.
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03-13-2020, 05:03 PM | #29 |
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Re: Timken Throw out bearings
I not sure it was noted, but Aetna throwout bearings are made in USA. I have spoken with the company in the last few years, but don't recall where they are in the Midwest. I got the Aetna bearing from Fort Wayne clutch.
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03-13-2020, 07:42 PM | #30 |
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Re: Timken Throw out bearings
Related question. How is the bearing installed on the hub?
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03-14-2020, 06:39 AM | #31 |
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Re: Timken Throw out bearings
The shiny surface (which has the machined flat face) is the side that faces the clutch. The bearing slides on by hand most of the way. The last 1/8” of travel is a light press fit. We use our shop press but you could do it in a bench vise if you blocked it into place adequately. The lip of the carrier hub will protrude through the other side of the bearing slightly when fully installed so allow for it to clear the bearing when pressing them together.
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03-14-2020, 11:59 AM | #32 | |
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Re: Timken Throw out bearings
Quote:
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03-14-2020, 06:59 PM | #33 | |
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Re: Timken Throw out bearings
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I felt lucky just remembering that HE told the story/process, Ha !! BTW, your stated position makes best sense regarding TOB. |
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03-15-2020, 05:16 PM | #34 |
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Re: Timken Throw out bearings
Another small thing that I found out the hard way, - make very sure that the bearing is pressed on all the way and bedded down squarely with the casting. If it is slightly off square and not all the way on, you will get clutch shudder for sure, as it will engage the fingers unevenly.
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04-08-2020, 07:33 AM | #35 |
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Re: Timken Throw out bearings
Great info thread on TO bearings. BTT for those who may have previously missed this.
*NOTE: Link to another post on same subject: https://www.fordbarn.com/forum/showthread.php?t=279017
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04-08-2020, 08:16 AM | #36 |
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Re: Timken Throw out bearings
Here are some NORS on EBAY.Although I don't need one would these be risky to use?
https://www.ebay.com/itm/NOS-Clutch-...A/303518719628 |
04-08-2020, 10:08 AM | #37 |
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Re: Timken Throw out bearings
Timken moved to China several years ago. Their US plant closed.
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