RE57603 Torsional Damper Fits John Deere 6610 6650 8100 8120 8200 8220 8300 9510One New Aftermarket Replacement Torsional Damper Fits John Deere Combine Models: CTS II, 9510, 9510SH, 9610 Cotton Picker: 9976 Forage Harvesters: 6610, 6650 Industrial Construction Models: 644G, 740G, 762B, 770C, 770CH, 770D, 772CH, 772D, 850C, 870D, 872D Skidder: 748GII Tractors: 8100, 8100T, 8120, 8120T, 8200, 8220, 8220T, 8300, 8300T, 8320, 8320T, 8400, 8410, 8410T, 8420, 8420T, 9100 Replaces Part Number(s): RE57603