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Ohio | Have some questions about mudders. How does it work to have the front tires, a bigger diameter than the back ? And in that vein ,can you change the gearing easily to put bigger tires on the back ? Where and how are these tractors used ? I'm assuming vegatables for clearance ? Most are equiped with narrow tires? And as a whole are these tractors on light draft loads ? More predominate in the south ? What are the things to look out for on a mudder? TIA |
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New London, Wisconsin | Generally they are a high clearance narrow tire version. I have a John Deere 6410 that is the mudder version, also know as a high crop. It's a factory setup geared appropriately for the tire size which in my case still has smaller ones on the front altho not that small. 13.6-38 fronts and 13.6-46 rears. I'm not a veggie, rice or cane grower and it turn heads around here in NE Wisconsin, but it is the clear ticket for my 20 inch corn rows.
After reading my owners manual I understand there is one gear in the transfer case to the front that could be changed to make or unmake a mudder version of this model. |
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Ohio | That's what I was wondering--how hard it would be to change gearing to install different tire combinations. Thank you. |
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New London, Wisconsin | I really don't know how hard, I just know it can be done. Mine does not have any special axle drops, but some do. On those my guess is it's too much trouble. I would show you a picture of mine, but I can't seem to get it to work.
/Users/temp/Desktop/6410 1.jpg |
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Eastern VA. No such thing as too many Magnums. | Mudders are the same thing as High Clearance. They usually have larger tires than a standard tractor, but the fronts are still smaller than the rears. A High Crop is not the same thing. It has significantly more clearance. A true high crop has drop axles on the back and, if it has MFWD, the front and back tires are the same size. The fronts may look bigger, and the rim is a bigger diameter, but the rolling circumferance is not bigger. It just looks bigger because of more yellow rim. (see the first picture below of the 7420, the front tire is not actually bigger, it's an illusion. Front tire is a taller rim with a lower profile tire) Deere offered mudders as 2750-2955s. Then the 6000 series. High crops were always made in Waterloo. Like 4010-4255. Then they switched to 7200-7330. The 00 and 10 series also offered high crops in 74 and 75 sizes. Now its only 7330s. They had some little 5000 series high crops too, not sure if they're still available or not. As far as gear ratios, the difference is in the transfer case on both styles. Then you also have the drop axles on the high crops. Most of the time it isn't worth putting it back to a normal tractor unless you really get a steal, and like working in the shop. There are a lot of those tractors in the southeast and California.
Edited by Virginia Veg. 1/8/2012 18:37
 (Copy of 7420HC2.jpg)
 (HighCropDropAxle.jpg)
 (6420HighClearanceMudder.jpg)
 (2955HighClearanceMudder.jpg)
 (5240HighClearanceMudder.jpg)
 (3688 HiCrop.jpg)
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 Copy of 7420HC2.jpg (84KB - 578 downloads)
HighCropDropAxle.jpg (49KB - 595 downloads)
6420HighClearanceMudder.jpg (99KB - 607 downloads)
2955HighClearanceMudder.jpg (76KB - 573 downloads)
5240HighClearanceMudder.jpg (67KB - 580 downloads)
3688 HiCrop.jpg (70KB - 572 downloads)
4255HiCrop.jpg (71KB - 599 downloads)
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Ohio | The tractor that I'm looking at is a high crop, it has the drop axle that you show. But the front tires are at least 1' taller. If the axle housings would be available, could a guy drop that rear backdown to a standard configuration ? I'm guessing the ring and pinion would be different too ? With the differental spinning the pinion on the drop axle assembly and a smaller tire on top of that. That differential has to be spinning faster than a regular application, or is my thinking wrong. It could be the same ring and pinion as a regular , but if that is the case they must REALLY gear that front axle down, would you agree.The tires on the front of the tractor would be great for the back. Thanks Rafe you have shed more light on this for me. THANK YOU Just looked at your pics. The tractor I'm looking at has about the same size difference in tire sizes as the 2955, only difference is the tall are on the front.
Edited by OHKen 1/8/2012 18:45
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New London, Wisconsin | Viginia veg said it well. In my post I said high crop when I meant high clearance. Mine is set up with the same tire rim combo as the 6420 picture. |
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Eastern VA. No such thing as too many Magnums. | The front tires are actually 1 foot taller? Wow, I don't know what to think about that. I've never seen one that is actually 1 foot taller. That makes me wonder if someone changed them out and they're wrong. I know for a fact Deere never offered it like that. I don' t think the ring and pinion on the rear end of a high crop is any different. It's just the drop axles. I know the front is really geared down. It was a bad idea too, because gearing those 7000 series down so low put a lot of strain on the front diff and planetaries and we had a couple fail. Late in the 10 series high crops, they started putting 12 bolt front planetaries on the high crops. (Same as the 8000 series!) It was amazingly huge for a 100 hp tractor. Here is a side by side picture of the small 10 bolt front end on a 10 series and the large 12 bolt on a 20 series, sorry, not the best picture. Also notice the front tires look bigger, but they're actually not.
 (7410and7420.JPG)
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7410and7420.JPG (81KB - 650 downloads)
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Brazilton KS | I'm pretty sure I've seen some Landinis and maybe AGCOs with fronts taller then rears. |
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Eastern VA. No such thing as too many Magnums. | Those don't count Mark! |
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What are "mudder tractors" ?
