The Caterpillar 1668220 is a genuine OEM 12-volt, 11-tooth electric starter motor designed for reliable engine ignition. This starter is compatible with a wide range of Caterpillar machinery, including C7 and C9 industrial, petroleum, and marine engines. It also fits various excavator models (324D, 325D, 328D, 329D), M325D material handlers, D6N/D6T track-type tractors, 950H/962H wheel loaders, and multiple compactor models (CP-56, CS-56, CB-54). Weighing approximately 15.0 kg, this starter ensures efficient and consistent starting performance for heavy-duty applications.