What exactly are they ? Our planter has approx. 1300 ac/row. on XP units. I bought a couple new bushings and a new upper new arm. Nothing really seemed really worn  or egg shaped. If you hooked a strap around the rear of he shank by the closing wheel frame, you could lift the rear of the unit with a forklift more than 1 inch before the whole unit/lift arms would begin to raise. We then bought 8 bushings, 2 upper arms and the lower casted arm. That completely tightened the unit up with no lag time when you lifted it. I guess although the wear seemed minor the sum of all the pivot points wear made it loose.

I would be interested in this repair. We to do a repair on a wing pivot on our planter. We had to take 15 row units off to be able to manipulate the wing. We replaced all of those lower arms as we all but had them off. Just to eye them. they were not warn egg shape. If you bore them a 1/16th" with a oversize bushing that would be the ticket.

Shoup has a kit with a jig to repair Deere drills but nothing for planters. Before we put the planter away we probably will knock the other side apart and reinforce the pivot on other side and R&R the lowers on the that side. Finishing the uppers next spring getting the NFMS parts discounts.

The pivot on the closing frame that the closing wheels mount to are looser than a goose. Has any tried the R&K fix for that ?