Bright Raven said:
Texasmark. Thanks.
This is an interesting topic for me. I bought a used Bush Hog and had vibration problems. As you can see, I replaced the front PTO shaft and it helped a lot. But I have concluded that there is going to be some level of vibration. The shaft in front and behind the carrier bearing are about the same length.
Apparently there is more to do with it than the shaft(s) on the implement. The 530 baler had a single shaft with a U joint on each end. May also have to do with the location of the rear tires (ground contact) vs the length of the drawbar for the second "shaft" dimension. Otherwise I see no need for the drawbar extension used with the JD machines mentioned.
On a 2 shaft device, add the tractor PTO shaft as mentioned and you have 3 shafts. Don't know what the speed sharing effect is on that, whether is splits the load and reduces the vibration or enhances the problem. I really doubt an OEM implement producer would put the second shaft in your unit if it didn't enhance performance.