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JD 4210 TRANSMISSION

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west
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Posts: 1
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2005-10-22          118269


I have a jd4210 with 400 hrs on it. the input shaft to the transmission twisted off. this is the second time, first time at 150 hrs. Has anyone else had any problems like this? Bought the tractor new and have followed maint. to the letter.

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JD 4210 TRANSMISSION

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kwschumm
Join Date: Feb 2003
Posts: 5764 NW Oregon
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2005-10-22          118270


Sounds like something is misaligned. Just a guess, but maybe the bearing is located a bit off in the transmission casting (factory defect). ....

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JD 4210 TRANSMISSION

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Peters
Join Date: Feb 2002
Posts: 3034 Northern AL
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2005-10-22          118275


I agree with Ken to have the shaft break every 200 hours it must be a fatigue at that position. The only thing I can think of is that the transmission is out of alignment some way in the casting. It could be in the internal bearing guide machining or casting its self. It must be flexing the shaft at that position. You would also need to consider the casting of the engine block being out of square on the mating surface of the splines in the flywheel. Check the flywheel to determine if it is running true as this could add to the dynamic unbalancing of the input shaft.
As with any mechanical problem if you can investigate and deterimine what the problem is you have an easier time with getting proper compensation from the manufacturer. I am accustomed to checking tight alignment of printing and injection moulded parts. I am sure if you look closely you should be able to determine what is out. ....

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JD 4210 TRANSMISSION

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mikerowland
Join Date: Jul 2015
Posts: 2 North Carolina
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2015-07-21          193163


I bought a new JD4210 in July 2002. The reverse in the transmission was always stubborn and gradually got worse. It would pop out on its own and required manually holding the shift lever to keep it in reverse. It got so bad that I was afraid to get into a corner where I would need reverse to get out of it which limited where I could use the tractor, which I mainly used for pasture mowing. I had a loud noise develop and when they took the transmission apart the bearing for the drive shaft had disintegrated and had to be replaced. When I first got it back the transmission seemed to work better than ever, but then suddenly it became almost impossible to get the shifter out of the gear it was in, making it near impossible to restart the engine once turned off since it has to be in neutral to activate the starter. It has been returned to the dealership for repairs again, and I have heard some discussion that the 4210 transmissions have perhaps been having significant problems from other buyers too, but I don't seem to be finding the correct website forum to uncover information about this and what responsibility the John Deere company may be taking or be required to assume for the cost of labor and materials for making such a repair. Anyone else out there know about a website where I might learn more about if this is a wide spread problem and what the company has been providing in terms of corrective treatment and expense coverage for others with similar problems? Perhaps my information about this being a common problem for standard transmission 4210's is not correct? thanks, Mike ....

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