When I bought my used JD 530 roller, I don't recall a CV joint on the shaft. I remember that because hooking the drive line to the tractor PTO was a no brainer. With my current 375 which has a CV joint on the tractor end it is quite heavy and cumbersome.
What I did get with the 530 was a draw bar extension of roughly 20 inches. Apparently the CV is required when the angles between the drive and driven (tractor and baler) aren't equal. The shafts travel at different speeds (believe it or not) in turns and cause vibrations. What the extension did was to equal the lengths of the two thus causing the two shafts to turn identically and prevent the vibrations encountered in turns.
The other thing the drawbar extension did was (as you surely know) was to push the swather (JD 1209) tongue (when used with the swather also) out beyond the rear tires such that you could make a 90 degree turn in the field and not have to come back over with an X to pick up the corners.
Would you comment on that please?
Reasoning here is a possible solution for "old horse" whereby he could use an extender (found mine used at a "yesterday's tractor" dealer for 50 bucks), and a conventional drive line and do away with the CV joint......I don't recall a CV joint on the swather either, but there was a support about a foot from the connection to the tractor PTO.
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