D138038 Swing Tower to Frame Lower Pin Fits Case 580KOne New Aftermarket Replacement Lower Swing Tower to Frame Pin Fits Case 580K Backhoe Loader This aftermarket replacement lower pin secures the swing tower to the main frame on the Fits Case 580K backhoe loader, forming the lower pivot point of the swing tower assembly. A worn or damaged lower swing tower pin causes looseness and play in the backhoe swing, reducing digging control and accelerating wear on surrounding bushings. Replacing this pin