Fits John Deere Parts PP 8.5" STEERING CLUTCH AT16121 440,420,40,1010, MC,1010One New Aftermarket Replacement 8 1 2" Steering Clutch Pressure Plate Fits John Deere Crawler Dozer This aftermarket replacement steering clutch pressure plate Fits John Deere vintage crawler and dozer models. The pressure plate is a core component of the steering clutch assembly, which transfers engine power to each track independently, enabling directional control on crawler type machines. Two units are required per machine one for each side.