KYB 4310049 Final Drive Travel Motor Assembly

The 4310049 final drive assembly integrates a hydraulic travel motor with a planetary gearbox for the Hitachi EX55UR series mini excavators. It features a two-speed motor configuration for high and low range travel. The unit mounts via a 180 mm inner diameter pilot with 12 bolt holes (9+3 pattern) on the machine frame side. The sprocket interface has a 230 mm inner diameter with 9 or 12 bolt holes. Hydraulic connection includes 3 or 4 ports for pressure, return, case drain, and two-speed control. The assembly is supplied new, aftermarket, pre-filled with gear oil, and ready for bolt-on installation. Cross-references include Hitachi OEM numbers 4339853, 4403533, and 9133264, and KYB MAG-33VP series motors.