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Farmall & IHC Tractors Discussion Forum
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M farmall tire switch

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Bill Zuke

09-08-2006 08:25:49




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I am attempting to just get a replacement tire for my 1941 M FArmall. I had a 13.6 x 38 that was bad on the left. I have found a tire and rim that is a 12.4 x 38 that is coming off the right side and I now want to use for the left side. Will this work fine for just an old work tractor?

Bill




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Andy Martin

09-09-2006 06:17:59




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 Re: M farmall tire switch in reply to Bill Zuke, 09-08-2006 08:25:49  
I've been running a balber tractor with just this combination for a year because my spare was the wrong size and we ruined the big tire. You can see the tractor sitting crooked until you get on it.

Just be sure to mount the tire the right direction. Valve core to the inside is really better.



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Bill Zuke

09-09-2006 16:33:46




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 Re: M farmall tire switch in reply to Andy Martin, 09-09-2006 06:17:59  
It is already mounted as of today. It actually look bigger than the other one. I guess I need to take my air tank out there for the old one.



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CNKS

09-08-2006 14:05:15




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 Re: M farmall tire switch in reply to Bill Zuke, 09-08-2006 08:25:49  
Check the ply rating, 6 ply is taller than 4 ply, if the 13.6 is 6 ply and the 12.4 4 ply, there will be a noticable difference in appearance, perhaps wear also, I don't know.



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Nat 2

09-08-2006 13:10:33




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 Re: M farmall tire switch in reply to Bill Zuke, 09-08-2006 08:25:49  
The only down side is that it will increase the wear and tear on the differential because the mismatch tires will cause the two wheels to turn at different rates.

It's a major problem on cars with "donut" spares when people don't get the regular tire fixed or replaced immediately. Because the tractor is a low-speed machine, it'll take a lot longer for the problem to show up, though. In a car, you can tear out the differential in only a few miles if you run too fast on the donut spare.

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ebbsspeed

09-08-2006 13:20:33




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 Re: M farmall tire switch in reply to Nat 2, 09-08-2006 13:10:33  
I wouldn't be too concerned about the difference in tire diameter wearing out the differential. Think about when these old girls were used to plow all day long. Depending on the ground, it seemed like one rear tire was always turning a little faster than the other, due to unequal traction in the furrow vs on the unplowed ground.



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Marv

09-08-2006 12:20:52




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 Re: M farmall tire switch in reply to Bill Zuke, 09-08-2006 08:25:49  
The valve stem may be on the inside (tractor side) of the rim. This should not be a problem.



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Bill Zuke

09-08-2006 12:58:07




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 Re: M farmall tire switch in reply to Marv, 09-08-2006 12:20:52  
I am mostly runniing in circle anyway. Maybe I can just hit the right break to compensate.

I bought the tire and rim. I looks pretty good and it was $150 cpmpared with $500 or more for new ones. We will make it work.



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Mike CA

09-08-2006 12:14:32




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 Re: M farmall tire switch in reply to Bill Zuke, 09-08-2006 08:25:49  
If you put the tread on backwards you run the risk of the wheel moving in the wrong direction. Then you would be stuck going around in circles.


But what do I know.



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gene bender

09-08-2006 20:05:03




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 Re: M farmall tire switch in reply to Mike CA, 09-08-2006 12:14:32  
Having the tread on backwards will not make the tractor run in circles.



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Janicholson

09-08-2006 10:26:24




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 Re: M farmall tire switch in reply to Bill Zuke, 09-08-2006 08:25:49  
I agree with Rusty, the only issue is that the differential spiders and side gaers will be in continuous motion. This is the same as making a continuous sweeping turn while contour plowing. I see no harm in it, but it does unballance the tractor. JimN



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RustyFarmall

09-08-2006 08:36:26




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 Re: M farmall tire switch in reply to Bill Zuke, 09-08-2006 08:25:49  
The 12.4 is one size smaller than a 13.6. I don't like to see tractors with mis-matched sizes of tires but for the most part the tractor will not know the difference. If you do some shopping, you may just find some brand new tires at very reasonable prices. Reasonable enough that a pair of brand new tires will make much more sense than a pair of mis-matched used tires.



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