RE12121 Aftermarket Hydraulic Coupler Conversion Kit Fits John Deere ModelsOne New Aftermarket Replacement Hydraulic Conversion Coupler Kit Fits John Deere Tractor Models: 1020, 1030, 1130, 1520, 1530, 1630, 1640, 1830, 2020, 2030, 2040, 2130, 2140, 2240, 2440, 2520, 2630, 2640, 2840, 2940, 3020, 3030, 3040, 3130, 3140, 4000, 4020, 4030, 4040, 4230, 4240, 4320, 4430, 4440, 4520, 4620, 4630, 4640, 4840, 5020, 6030, 7020, 7520, 8430 (1974 1981), 8440, 8630, 8640 Tech Info: Converts Fits John Deere remote couplers to ISO