Kawasaki M3B280BP Hydraulic Motor | M3B280BP-252/140-XV024A | M3X Series Main Motor

LIC Hydraulic proudly offers the Kawasaki M3B & M3X Series, the pinnacle of high-torque axial piston motor technology. Designed for heavy-duty open and closed-circuit systems, the M3B series is the industry standard for Main Luffing (Variable Amplitude) and hoisting functions in large-scale cranes. The specific model M3B280BP-252/140-XV024A offers a versatile displacement range ($140$ to $252\text{ cm}^3$), providing the perfect balance between high torque for heavy lifting and high speed for rapid positioning. Engineered for extreme reliability, our M3X/M3B motors provide 100% original interchangeability, ensuring seamless integration into equipment from SANY, Zoomlion, XCMG, and Manitowoc.

Technical Specifications (Bulleted List)

• Series: Kawasaki M3X (Fixed/Variable) & M3B (Variable) Piston Motors

• Frame Sizes: 200, 280, 530, 800

• Max Displacement (M3B280): $252\text{ cm}^3\text{/rev}$

• Min Displacement (M3B280): $140\text{ cm}^3\text{/rev}$

• Rated Pressure: $31.4\text{ MPa}$ ($4550\text{ PSI}$)

• Peak Pressure: $34.3\text{ MPa}$ ($5000\text{ PSI}$)

• Feature: Integrated Mechanical Brake (BP) and Precision Luffing Controls (XV)

Key Technical Advantages

• High Starting Torque Efficiency: Kawasaki’s advanced piston-shoe design ensures a high mechanical efficiency (>90%) at startup, which is critical for preventing “load-drop” in hoisting and luffing applications.

• Smooth Low-Speed Performance: The M3B series exhibits virtually zero “cogging” or stick-slip at speeds as low as $1\text{ RPM}$, allowing for the micron-level precision required in high-altitude construction.

• Wide Dynamic Range: The dual-displacement capability allows the motor to adapt to varying load conditions, maximizing the work cycle efficiency of the crane.

• Robust Integrated Valve Options: Can be equipped with counterbalance valves and shockless relief valves directly on the motor, protecting the drivetrain from sudden pressure spikes.

Application Areas

• Cranes & Lifting: Main hoist and luffing winches for crawler cranes and tower cranes.

• Marine & Offshore: High-load winch drives and subsea equipment.

• Tunneling: Cutterhead drives for TBM (Tunnel Boring Machines).

Expert Maintenance Tips

• Case Drain Management: Always connect the case drain directly to the tank. Excessive backpressure in the motor housing (above 2 bar) is the #1 cause of shaft seal failure and inaccurate displacement control.

• Brake Release Verification: For BP models, ensure the brake release hydraulic signal is consistent. Partial release will lead to friction disc overheating and catastrophic contamination of the hydraulic system.

• Thermal Shock Prevention: For large frame sizes like the M3X800/M3B280, avoid sudden full-load operation in cold weather. Gradual warming of the hydraulic oil ensures proper lubrication of the swashplate bearings.