Kawasaki M3X M3B Series Hydraulic Piston Motor | M3X200 M3X280 M3X530 M3X800 | M3X800ACN-005A

The M3X/M3B Series axial piston motors (including M3X200, M3X280, M3X530, and M3X800) by Chengyuan Hydraulic are heavy-duty swashplate motors designed for demanding mobile and industrial applications. Fully interchangeable with Kawasaki technical standards, these motors offer 100% original-place compatibility. The M3X series is renowned for its exceptional low-speed smoothness and high-torque performance. Every unit undergoes 100% simulated condition testing, ensuring superior volumetric efficiency and structural integrity at continuous pressures up to $300\text{ bar}$. It is the premier choice for excavator swing drives, winch systems, and rotary drilling rigs.

Technical Specifications 

• Series Models: M3X (Fixed) / M3B (Variable) Displacement

• Model Identification: e.g., M3X800ACN-005A

• Displacement Range:

  • M3X200: $195\text{ cm}^3\text{/rev}$

  • M3X530: $533\text{ cm}^3\text{/rev}$

  • M3X800: $800\text{ cm}^3\text{/rev}$

• Rated Pressure: $30\text{ MPa (300 bar / 4350 psi)}$

• Peak Pressure: $34.3\text{ MPa (343 bar / 4975 psi)}$

• Max Speed: $1000\text{–}1900\text{ rpm}$ (depending on displacement size)

• Max Output Torque: Up to $3819\text{ N}\cdot\text{m}$ (for M3X800)

• Brake Option: Available with integrated multi-plate mechanical parking brake

• Weight: $85\text{ kg}$ (M3X200) to $260\text{ kg}$ (M3X800)

Key Technical Advantages

• Superior Low-Speed Stability: Utilizing Kawasaki’s unique piston design and precision valve plate synchronization, the M3X series minimizes torque ripple at low speeds. The motor can operate smoothly as low as $1\text{ rpm}$, ideal for high-precision crane and swing operations.

• High Starting Torque Efficiency: The optimized hydrostatic balance between slippers and the swashplate ensures a starting torque efficiency exceeding $90\%$. This allows for seamless startups under full load with minimal static friction resistance.

• Heavy-Duty Bearing Support: Equipped with oversized tapered roller bearings capable of handling significant radial and axial forces. This allows direct drive configurations via gears or sprockets without the need for auxiliary support bearings.

• Bi-Metal Valve Plate Durability: Features a high-wear-resistant bi-metal valve plate paired with a hardened cylinder block. This combination ensures minimal internal leakage even under high-frequency impact loads and wide temperature fluctuations.

Application Areas

• Construction Machinery: Excavator swing drives, rotary drilling rig power heads, and trenchless piping machines.

• Marine Engineering: Marine winches, windlasses, and deck crane drives.

• Industrial Plants: Continuous casting machine drives and heavy-duty conveyor systems.

Expert Maintenance Tips

• Case Drain Pressure: Always ensure the case drain pressure remains below $0.1\text{ MPa}$. Excessive backpressure will cause shaft seal failure or slippers to disconnect from the pistons.

• Initial Priming: Fill the motor casing with clean hydraulic oil through the drain port before initial operation. Never start the motor dry.

• Brake Logic Verification: For models with integrated brakes, verify that the brake release pressure (typically $1.5\text{–}2.5\text{ MPa}$) is applied correctly before main circuit pressure is established to prevent friction disc damage.