This tool is a must when servicing Trucks. uses a slinger (wear ring) installed onto the crankshaft, this prevents crankshaft from wearing a grove, this eliminates the need of a costly crankshaft replacement. The depth of the slinger is very critical. These seals will leak if this tool is not used when servicing these trucks Application: FUSO 6M60 ,4D31 ,4D34 ,4M50 ,6D31,6D34, 6D14,6D16,6M60,GM60 Oil seal genuine no: ME034976 Dimension of the oil seal:108*140*180*17mm OEM # MH061470