AH89498 Sickle Knife Head Fits John Deere 200 & 900 Grain HeadsOne New Aftermarket Replacement Sickle Knife Head Fits John Deere (Fits JD) 200 & 900 Series Grain Heads and Cutting Platforms This aftermarket sickle knife head is a direct replacement for the cutting unit on Fits John Deere (Fits JD) combine grain heads and cutting platforms. The knife head connects the sickle drive actuator mechanism to the sickle bar assembly, transferring drive force to the cutter bar to keep your harvest operation running at