AGCO did not upgrade the u-joint in the chopper kit. Two have been yoke casting failures and the third just spread. Parts warranty is covering it so far. I've found a heavier one that would bolt right in place but am concerned about what else will break. I would rather not screw up an accelerator roller.Do they upgrade to a heavier u joint for the high speed one or something. What is actually breaking the cross piece or the housing or maybe can't tell depending on damage. You could always install a way heavier one but if it's breaking the ones that are supposed to be right you will either get it to work with a heavier one or find the next weakest link. Maybe could try a different supplier for the joint incase there was a bad batch or something too. Good luck
Running a 40 ft 9250. All reverse bar removed. Not sure how you feed much smoother then that. Starting to wonder if stationary knives with the new chopper are too much load for the u-joint.When I had a u-joint yoke break on my S-77 it was within 50 feet of cutting after a software upgrade that screwed up the spreader speed control. The spreader stopped and plugged the chopper. After the software was changed back, no more problem.
Now having said that I feel fairly certain that you are having a feeding issue into the chopper and you are getting slugs of material into the chopper and not feeding it evenly. I was told and now believe the u-joint is built the way it is to be a type of safety unite for the chopper. If you put in a heavier u-joint you will only tear up something more expensive. You need to check into how the chopper is being fed.
I have always ran the knives full in on past combines in soybeans with no problem. I was told I could do the same with the new chopper but it would take more horsepower. After the second failure, I pulled then knives out half way. The next day I had the third failure. The knives are clear out now. Will see tomorrow if it helps.You don't have the stationary knives all the way up do you? They are only supposed to be about half way up if that for beans. On an older 75 we had one time with the fine cut we had the knives all the way up in some real green stem stuff and we started tossing hammers like crazy.
Green steam beans were giving my chopper you no what until I moved the last three sweeps half way into the discharge, then it smoothed out and never sounded like that again. The new machines have every other discharge paddle removed causing slugs to hit the chopper, put sweeps in and it will feed it smoother and more evenlyHave you tried putting a set of sweeps on the end of the rotor to make sure you are feeding it evenly?