Case 164691A1 Final Drive Motor Assembly

The 164691A1 is a complete hydraulic final drive travel motor assembly designed for the undercarriage drive system of 12-13 metric ton class hydraulic excavators. It integrates a hydraulic motor with a planetary reduction gearbox to deliver high torque for track propulsion. Key technical specifications include a mounting frame pilot inner diameter of 246 mm with 20 bolt holes, and a sprocket mounting pilot inner diameter of 324 mm accommodating 15 or 30 bolt hole patterns. The unit features 3 or 4 hydraulic hose ports for pressure, return, and case drain lines. This assembly replaces OEM part numbers 161303A1 and 164541A1 and is interchangeable with a wide range of aftermarket references including KRA10120, LJ018710, and various Kayaba, Nachi, and Eaton equivalent units. It is supplied as a sealed, ready-to-install unit requiring no core return.