D135742 Inner Boom Pivot Bushing Fits Case 580 580SKOne New Aftermarket Replacement Inner Boom Pivot Bushing Fits Case 580 Series Backhoe Loaders This aftermarket replacement inner boom pivot bushing fits the swing tower assembly on Fits Case (Fits Case International Harvester) 580K and 580 Super K backhoe loaders. Located at the inner swing tower at the boom, this bushing features a lip a key distinguishing detail, as inner swing tower bushings have a lip while outer swing tower bushings do not. It