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Farmall & IHC Tractors Discussion Forum
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What makes a TA slip?

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charles todd

01-18-2008 19:30:08




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This message is a reply to an archived post by Jim on February 18, 2002 at 14:10:22.
The original subject was "What makes a TA slip?".

Mine was slipping on the low side. While changing the clutch and installing a re-surfased flywheel (button clutches are aggressive) I inspected the T/A. My rollers in the sprag had flat spots on them. Installed new rollers, springs, ect. Still had some low slip. I had a machine shop knurl the rollers to increase the O.D. Now the T/A works good in low, but when in direct and you stop in gear with the cluch in, the transmission binds and you have to tease the clutch to slip it into neutral. Eventually I will have to install a rebuilt T/A (bout $600). I do not think I could live with a T/A eliminator kit (5+1 instead of 10+2). Hope this was helpful

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Tom/Idaho

01-19-2008 05:14:36




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 Re: What makes a TA slip? in reply to charles todd, 01-18-2008 19:30:08  
I don"t need one, but am curious. what is a TA eliminator ? Thanks, Tom/Idaho



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Tom/Idaho

01-19-2008 05:21:30




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 Re: What makes a TA slip? in reply to Tom/Idaho, 01-19-2008 05:14:36  
Never mind, I found the answer in the archives. Should have gone there first. Thanks again, Tom/Idaho



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Kevin Meier

01-18-2008 20:02:25




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 Re: What makes a TA slip? in reply to charles todd, 01-18-2008 19:30:08  
A mechanical ta will slip on the high side if it is adjusted wrong, ta clutch and flywheel are bad or your primary clutch is bad. I can believe you knurled your rollers and that works. A roller should hardness test around 58 hrc which is pretty much impossible to knurl. I have almost any of the parts you may need or a replacement t/a email me if interested, or need any help. I"ve been building ta"s for 15 years now. Good luck Kevin

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charles todd

01-18-2008 20:19:34




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 Re: What makes a TA slip? in reply to Kevin Meier, 01-18-2008 20:02:25  
My TA does not slip, at all! I was trying to answer an old post regarding a slipping TA, but the thread was too old. My only problem is when in direct (high), stopped in gear, the shifter is tight and you have to feather the clutch or pull back into low to release the shifter. It is somewhat annoying, but I have just learned to start in low then shift out to high.

As for the TA sprag, the parts came from Scott Truck and Tractor in Louisiana and were IH parts, and hard as hell. My friend was able to knurl them with a fine knurl, how I do not know but all eight (i think) were knurled. I do know it works and pulls hard in high or low.

The main clutch and flywheel are in great condition. The TA is why I like my ol 504. I will dig around an find my IT manual and check out the adjustments. I appriciate all the good info, Thank you.

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Steven f/AZ

01-18-2008 19:58:26




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 Re: What makes a TA slip? in reply to dennis repaal, 01-18-2008 19:30:08  

charles todd said: (quoted from post at 20:50:23 01/18/08)You say adjusting the clutch/TA? There are several threaded rods on the clutch and TA. I am unclear where to start adjusting. Finding info on a TA is a black hole.


Adjustment procedure is clearly written in the owner's manual or a decent shop manual.

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Steven f/AZ

01-18-2008 19:37:55




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 Re: What makes a TA slip? in reply to charles todd, 01-18-2008 19:30:08  
If your tractor is binding in gear while the TA is in high range, try pulling the TA lever back to the low range --- if it shifts easily, your clutch/TA is out of adjustment and you will have problems if you don't correct it.



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charles todd

01-18-2008 19:50:23




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 Re: What makes a TA slip? in reply to Steven f/AZ, 01-18-2008 19:37:55  
It only binds when in low, clutch in, and tractor stops. I have been dealing with this for about 7-8 years which is when I re-worked the T/A. I have to pull it into low to shift when stopped. Once moving, I can "scratch" through the gears. I susspected it was the knurled rollers being over aggressive in the sprag.

You say adjusting the clutch/TA? There are several threaded rods on the clutch and TA. I am unclear where to start adjusting. Finding info on a TA is a black hole. I work with a retired tractor mechaninc and he said to just install an eliminator, as the TA was too much of a pain... Help appriciated.

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Wayne in MN

01-19-2008 06:28:14




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 Re: What makes a TA slip? in reply to charles todd, 01-18-2008 19:50:23  
Get an original owners manual or reprinted one. The proceedure is very specific on where & how much to adjust.
Many book sources available on this site or elsewhere. $25- $30 is going rate for reprints.



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