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JD 3720 utility tractor.
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ccjersey
Posted 11/19/2024 12:54 (#10973888 - in reply to #10972358)
Subject: RE: JD 3720 utility tractor.


Faunsdale, AL
Lots of different models use that same axle shaft part number LVU801535

Go on JD parts website and do a part number/where used search for that number and you’ll come up with 10 or so. Might help you come up with one.

3120, 3320, 3520, 3720, 4105 and a similar newer R series 3033R, 3038R, 3039R, 3045R, 3046R, all show up.

I can think of only one reason you would need two axle shafts. That being both bearings went out and damaged the axle surfaces where the bearing or a seal runs. From bitter experience with a larger tractor (310D backhoe), do not attempt to repair by welding. If you want to attempt a repair, maybe have a sleeve shrunk on it and turn that down to get a surface for the seal to run on.

I cannot find enough detail on the actual construction of the axle shaft, seal and “lock collar” to say what repair might be possible but I don’t think it’s possible to use some sort of welding or metal deposition process without damaging that high stress part. The ones we had repaired for the 310 backhoe each lasted less than 50 hours before failing when a crack propagated across the shaft outboard of the axle bearing.

Link to a shaft failure picture like we had
https://marinesol.org/surveyors-comments/

Edited by ccjersey 11/19/2024 17:24
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