U10666 Bushing Fits John Deere 450C, 550, 555One New Aftermarket Replacement Bushing for John Deere Crawler Loaders and Dozers This aftermarket replacement bushing is a direct fit wear component for John Deere 450C, 550, and 555 crawler loaders and dozers. Bushings in these machines serve as pivot and bearing surfaces throughout the undercarriage, loader linkage, and blade mounting assemblies, absorbing wear and maintaining precise alignment between pins and structural components. Replacing worn