M2X146 Kawasaki Axial Piston Swing Motor 146cm³ 290bar

Product Overview

The Kawasaki M2X / M5X series is a range of swash-plate fixed-displacement axial piston hydraulic motors specifically designed by Kawasaki Heavy Industries for excavator swing applications. Featuring an integrated parking brake, compact axial length, and high power density, the series covers models such as M2X63, M2X96 (EX200-2), M2X120, M2X146 (EX200-5), M2X150/170 (EX400), and M2X210 (EX270/280/300). Our units are manufactured to original technical specifications, offering 100% interchangeability (flange, shaft end, ports, and brake interfaces fully match OEM) and 100% simulated-duty testing. They deliver smooth starting, reliable braking, and long service life under high-pressure swing duty as cost-effective direct replacements for genuine Kawasaki motors.

Technical Specifications 

• Models: M2X63; M2X96 (EX200-2); M2X120; M2X146 (EX200-5); M2X150/170 (EX400); M2X210 (EX270/280/300) and related M5X variants
• Displacement examples: M2X63 ≈ 64 cm³/rev; M2X146 ≈ 146 cm³/rev; M2X210 ≈ 210 cm³/rev
• Rated pressure: approx. 29.4 MPa (294 bar)
• Maximum pressure: approx. 34.3 MPa (343 bar)
• Maximum speed: M2X63 up to approx. 2200 rpm; M2X210 up to approx. 1400 rpm (model-dependent)
• Rated output torque examples: M2X63 ≈ 300 Nm; M2X210 ≈ 980 Nm
• Control: Fixed displacement, bidirectional, with built-in parking brake (optional without brake on some versions)
• Brake release pressure: approx. 2.3–3.4 MPa
• Weight examples: M2X63 ≈ 29 kg; M2X210 ≈ 66 kg
• Design: Swash-plate axial piston fixed-displacement motor optimized for swing applications

Key Technical Advantages

1. Precision swash-plate axial piston design and high-accuracy machining deliver superior volumetric and mechanical efficiency, smooth starting torque, and accurate swing positioning.
2. Integrated parking brake and compact axial length allow direct connection to reduction gears or swing ring gears, saving space while providing high power density.
3. High-quality bearings and sealing systems support continuous high-pressure operation and frequent start/stop cycles with low noise and long service life.
4. Full dimensional and performance interchangeability plus rigorous simulated-duty testing guarantee drop-in replacement of original Kawasaki units, minimizing downtime and lifecycle costs.

Application Areas

Specifically engineered for the swing mechanisms of medium to large hydraulic excavators. Typical machines include Hitachi EX200 series, EX270/280/300, EX400, as well as equivalent models from Volvo, Caterpillar, Kobelco, and other brands. Also suitable for other high-starting-torque positioning or rotary drive systems requiring reliable braking.

Expert Maintenance Tips

• Verify exact match of mounting flange, shaft end, and brake ports before installation; ensure the output shaft is not subjected to additional radial or axial loads.
• Maintain hydraulic fluid cleanliness to NAS 1638 Class 9 or better using anti-wear hydraulic oil; regularly check brake release pressure and response.
• Monitor swing speed, pressure, and temperature during commissioning; avoid prolonged over-pressure or over-speed operation.
• Use matching filter elements and seals during service; record operating parameters to detect early decline in efficiency or braking performance.