Doosan 401-00086B Swing Motor Assembly M2X150

This swing motor assembly integrates a Toshiba M2X150 axial piston hydraulic motor with a two-stage planetary reduction gearbox. The unit delivers slewing torque for 22-ton class crawler excavators. The motor core operates at 35 MPa maximum pressure with 150 cc/rev displacement. The reduction gearbox provides 16-tooth pinion output on a 16-hole mounting pattern. Assembly includes hydraulic motor, reduction housing, pinion shaft, and brake valve block. Designed for direct bolt-on replacement on Doosan DH225-7, DH220-7, DH215-7, and DX225LC models. Cross-reference part numbers include Doosan OEM 401-00086B, 401-00391, 401-00391A, 170303-00045, 170303-00049, K1000697A, and Mottrol MZEC045E. Compatible with Solar 225LC-7A and Hyundai R220-5 applications sharing the M2X150-16T configuration.