Top Link Chain Fits John Deere 520 530 620 630 720 730One New Aftermarket Replacement 2 Cylinder Top Link Chain Fits John Deere Tractors This aftermarket replacement top link chain is designed for the 3 point hitch system on Fits John Deere 2 cylinder tractors. The chain replaces the rigid top link connection on the 3 point hitch, allowing implements to float and flex over uneven terrain. It is a direct replacement for the original chain assembly used on the classic Fits John Deere two cylinder ("Johnny