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Antique Farm Tractors Vintage farm tractors on rubber tires with various implements. Ford, John Deere, Oliver, McCormick and more.

Antique Farm Tractors

1955 Farmall 300 Torque Amplifier


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  #1  
Old 09-17-2017, 12:16:12 PM
Nate Bolduc Nate Bolduc is offline
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Default 1955 Farmall 300 Torque Amplifier

I just picked up a Farmall 300 and the torque amplifier is bad. I tried adjusted it and that didn't help at all. I guess I have to replace the clutch. What other parts will I need to have in order to do this job? What seals, gaskets and other parts should I replace?
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Old 09-17-2017, 07:40:40 PM
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Default Re: 1955 Farmall 300 torque amplifier

There is a Sprague one way roller clutch in these unit that usually goes bad. It is supposed to only allow the planet gear carrier to rotate one direction. When the reduction is engauged the carrier stops and the planet gears inside rotate to provide the reduction. If the little rollers get too worn they allow the carrier to rotate backwards and forward travel stops. In direct position the carrier assembly rotates as a solid unit. There is a dry disc clutch and throw out bearing in there as well.
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Old 09-18-2017, 07:52:18 PM
ronm ronm is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

You have a T/A of the third condition...there are only 3 conditions:
1-New
2-About to go out
3-Out

I've only done a few, but you have to split the tractor twice on every one I've done...you might as well do the main clutch too.
Lots of aftermarket companies sell "improved" T/A's that will last longer, supposedly...
There are also T/A delete kits if you want to kick the habit.
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Old 09-18-2017, 09:12:06 PM
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Default Re: 1955 Farmall 300 Torque Amplifier

Some years back a neighbor had his 300 row crop TA fail. He priced the repair at the dealer and decided to fix it himself. He took it apart and simply welded the planetary gears solid! Then he took the hand lever off and ran it that way till it was sold on his estate sale many years later. I didn't get along with the old duffer all that well so I didn't attend that sale so don't know what it sold for or who was the unfortunate soul that got it!
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Old 09-20-2017, 05:54:47 AM
Nate Bolduc Nate Bolduc is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

Quote:
Originally Posted by ronm View Post
You have a T/A of the third condition...there are only 3 conditions:
1-New
2-About to go out
3-Out

I've only done a few, but you have to split the tractor twice on every one I've done...you might as well do the main clutch too.
Lots of aftermarket companies sell "improved" T/A's that will last longer, supposedly...
There are also T/A delete kits if you want to kick the habit.
What goes bad on them? Is it just the clutch?
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Old 09-20-2017, 10:08:21 AM
ronm ronm is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

The last one I did was a 666 Diesel, really sweet little tractor, & I'm not an IH guy...
The throwout bearing that operates the T/A clutch had seized up & worn through the fingers. I replaced the whole thing with an "upgraded" unit from Abilene Machine Co. Replaced the main clutch while it was split, & all the other seals & bearings that were opened up. I blame this problem on the operator running it in the low side all the time...the bearing wasn't designed to run all the time, it's like riding a clutch or running with no free travel, the bearing will give up. I told him to run it in the high side except when he needed low to turn on the ends or whatever, all he pulled with it was a hay rake...they will last a lot longer if you do this...
More about this particular tractor-it was bought new by a retired veterinarian, & only had about 900 hr. when he died...my neighbor bought it at the auction & put maybe 300 hr. on it before the TA went out. Totally straight & original, paint was fading a little. My neighbor died not long after we did the TA, & his kids still have it, haven't seen it lately.

PS-the "3 conditions" remark I actually heard from an old IH mechanic...
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Old 09-20-2017, 11:24:34 AM
John Schwiebert John Schwiebert is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

There are 2 clutches in the TA unit. A dry disk clutch that locks the unit in direct drive and a sprag type clutch which allows the planetary set to operate in low range. So does your unit slip in low range or in direct drive? Also Ron has a point, do not run 100% of the time in low range. More questions?
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Old 09-20-2017, 12:45:40 PM
Nate Bolduc Nate Bolduc is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

It slips in low range. I am going to use the tractor mostly for parades and tractor rides. It would be nice to have working because parades aren't always a steady speed.

---------- Post added at 12:45:40 PM ---------- Previous post was at 12:44:18 PM ----------

I would really like to know what seals I'll need to replace when I have the tractor apart. A parts breakdown would be great.
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Old 09-20-2017, 03:19:27 PM
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Craig A Craig A is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

Nate......read up on TA repairs.
It's not a job you want to tackle.......
I don't think pros even want to tackle them any more.......
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Old 09-20-2017, 10:54:11 PM
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Default Re: 1955 Farmall 300 Torque Amplifier

The R&R is not that big a deal, if you have the stands & hoists to do it. Just a PIA to split the tractor in 2 places. As for actually rebuilding the TA unit itself, I'm with Craig on that...I wouldn't touch one of the damned things.
If you get a unit from one of the aftermarket suppliers, they probably have a gasket & seal kit. I do not have a parts book for it.
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Old 09-21-2017, 09:13:21 AM
John Schwiebert John Schwiebert is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

You can buy exchange units that come with a warenty. There is a web site that my friend uses that has part numbers and prices. He does probably a half dozen TA units a year and has no problems. Send me an e-mail and I will give it to my friend when I see him next week.
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Old 09-21-2017, 03:48:06 PM
mmcdonald mmcdonald is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

Below is a link to parts diagrams if you want to peruse

http://partstore.caseih.com

It's a little confusing how it is arranged so I thought I would try to help. After you go to the website, go to these selections in this order
Parts Catalog
Browse
Tractors
Utility
Legacy

Then yours will be about the 5th line down. Good luck.
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Last edited by mmcdonald; 09-21-2017 at 03:52:42 PM. Reason: added info
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Old 09-21-2017, 04:01:11 PM
pegasuspinto pegasuspinto is offline
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Default Re: 1955 Farmall 300 Torque Amplifier

Someone may need to chime in here, but operating the T/A in a parade might be very dangerous. I seem to recall there is NO engine braking when the T/A is in 'low' so the tractor will be free to roll away when it's engaged. Trying to cram it back into high when the tractor is free rolling can destroy it. I can tell you a tractor can pick up speed rapidly on a paved downhill, and the brakes seem to be an afterthought, plus it can be dicey braking at speed if the right and left brake grab at different times.
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Old 09-21-2017, 06:06:32 PM
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Default Re: 1955 Farmall 300 Torque Amplifier

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Originally Posted by pegasuspinto View Post
Someone may need to chime in here, but operating the T/A in a parade might be very dangerous. I seem to recall there is NO engine braking when the T/A is in 'low' so the tractor will be free to roll away when it's engaged. Trying to cram it back into high when the tractor is free rolling can destroy it. I can tell you a tractor can pick up speed rapidly on a paved downhill, and the brakes seem to be an afterthought, plus it can be dicey braking at speed if the right and left brake grab at different times.
I have hauled full 250 bushel wagons down hill with a SMTA in low and am still alive!! I have installed several TA's in M's-86 series and they are very easy to install. The tractor needs to be split once at the clutch housing and once at the transmission. On a small tractor like a 300 I would split the engine away from the clutch housing then use a hoist to remove the clutch housing. Very simple to do but can be a little intimidating the first time and with all the negative comments on TA's can be discouraging. Go for it!! Get a good repair manual and have at it. Remember its all just nuts and bolts!

Last edited by Turbo; 09-21-2017 at 09:33:34 PM.
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Old 09-21-2017, 06:40:15 PM
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Default Re: 1955 Farmall 300 Torque Amplifier

Yes the early simpler version in the tractors will free wheel down hill in the reduction position. It is a very simple cure, release the lever back into direct. The disc brakes on these do require maintenance to keep them in shape. If they are in shape they will work just fine. When they came out with the 06 series of tractors in the 60s they did cure the free wheeling issue, but they used the same basic unit in all size tractors. So the larger horse tractors would go through the unit faster than say the lower HP tractors. One neighbor here would wear out the TA on his 1066 about once a year! I think he used it as a main field speed and at the end of every round for turning speed. He always claimed that if he threw a quarter in a box every time he shifted it he would cover the cost to replace by the time it gave out! On my 1206 and both 806's we just throttled back at the end of the row and it worked just fine for many years, my 806 gas is still on it's original TA.
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