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Farmall 140 wheel slippage

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Cajungreek

12-29-2005 08:50:47

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I have a farmall 140 1971 model. When pulling a set of row makers the back right tire will lose traction, and the left rear will not try to pull unless I hit the right brake. Is this normal, or is there some adjustment needed to make the left tire kick in and pull. If so how and where is the adjustment. Thanks for any help.

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Hugh MacKay

12-29-2005 13:00:54

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Re: Farmall 140 wheel slippage in reply to Cajungreek, 12-29-2005 08:50:47

I notice you told tractor vet in your second responce that both rear wheels have heavy cast hubs. This is wrong to start with, as Gene stated the 140 like the Super A should have a cast hub on the right and pressed steel hub on the left. Until you correct this your tractor will be off balance. Once you put the correct hubs on then you can add wheel weights of equal amounts to each side. These tractors when properly balanced will out pull about 99.9% of all tractors on the market as a percentage of their own weight. The only two I know of that will give them a chalange are the Farmall H and Cockshutt 30.

Another mistake people often make with these tractors, is position the rear wheels differently. This will affect the balance even more. Often times guys will dish the right wheel in and the left wheel out, thinking they are going to center the engine and power train equally between the wheels, this will render the tractor almost usless.

All tractors must be properly balanced to give good drawbar pulling. Improper balance will make most any good tractor look bad. IH engineered these offsets to work, and they had it right. Unbalanced tractors are also quite prone to upset, thus very dangerous.

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Gene-AL

12-29-2005 09:47:35

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Re: Farmall 140 wheel slippage in reply to Cajungreek, 12-29-2005 08:50:47

Just a guess, but could your rear wheels be mounted on the wrong sides? I've read that the 140 is the same as the Super-A on which the right rear wheel is a heavy cast-iron disc type, while the left rear is a lighter pressed steel disc. This wheel setup is to help balance the weight of the engine & power train which are offset to the left side. Owners of these tractors should know that it's risky to traverse a slope with the engine on the downhill side due to possible rollover! In any case, as the tractor vet said, auxilary wheel weights will help to nail it to the ground and stop that slippage.

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the tractor vet

12-29-2005 08:54:46

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Re: Farmall 140 wheel slippage in reply to Cajungreek, 12-29-2005 08:50:47

The only adjustment needed is to add more weight to the right side (1) by adding more weight to the right wheel by means of a wheel weight or cal.in the tire (2) eat more and drink more barley POP.

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cajungreek

12-29-2005 10:24:36

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Re: Farmall 140 wheel slippage in reply to the tractor vet, 12-29-2005 08:54:46

This tractor has very heavy center dishes on both sides. I had them off when I first purchased it. I have an old 8N and when one wheel starts to slip the other kicks in. That tractor has shims to adjust more or less to get both wheels pulling when slippage starts. I did know if the Farmall had something similar or different. This just may be something I have to learn to work with. Thanks for your response.

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Nat 2

12-29-2005 15:06:53

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Re: Farmall 140 wheel slippage in reply to cajungreek, 12-29-2005 10:24:36

This is the normal operation of a standard differential. The power will always transfer to the wheel with the least resistance. To compensate, tap or hold the brake of the spinning wheel to transfer power to the other wheel.

Your 8N may have a crude "limited slip" differential that explains why it behaves the way it does. IH didn"t have such a device back then, especially on its smaller tractors.

Now, you can add weight to improve traction, but BE CAREFUL here. If the implement you"re pulling is too much for the tractor, adding weight will only break the tractor when it grabs, but the implement still won"t go.

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Hugh MacKay

12-29-2005 18:32:30

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Re: Farmall 140 wheel slippage in reply to Nat 2, 12-29-2005 15:06:53

Nat: In all my many years and thousands of hours of tractor use, I've never heard tell of a tractor breaking because of too much load. They either pulled it, spun out or stalled. None of those happenings will break a tractor.

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