T180582 Shim Fits John Deere 450H, 450J, 550H, 550J, 650H, 650JOne New Aftermarket Replacement Dozer Blade Shim Fits John Deere Crawler Dozers This dozer blade shim is used in the blade pivot assembly on Fits John Deere H and J series crawler dozers. It fits between the blade ball socket components to set proper clearance and take up wear in the blade mounting system. Multiple shims are typically required per machine sources indicate up to 14 shims are needed per dozer depending on wear and configuration.