Poclain MS18 Hydraulic Motor | MS18-1-G21-F19-1320-5000 | MS18-1-D21 Radial Piston Motor

The Poclain MS18 Series from LIC Hydraulic is a powerhouse of Radial Piston Technology, designed for the most demanding Low-Speed High-Torque (LSHT) requirements. With displacements reaching up to 2812cc, models like the MS18-1-G21-F19-1320-5000 are engineered to deliver massive torque directly to the drive wheels or shafts without the need for reduction gearboxes. Our MS18 motors feature a modular architecture, enabling 100% drop-in compatibility for global machinery. Every unit is subjected to rigorous dynamic testing, ensuring that your equipment maintains peak productivity in the most hostile environments.

Technical Highlights

• Size: MS18 (Intermediate Heavy-Duty Series)

• Displacement Range: $1091\text{–}2812\text{ cm}^3\text{/rev}$

• Nominal Pressure: 400 bar (5800 psi)

• Peak Pressure: 450 bar (6525 psi)

• Max Torque: Up to 18,000+ Nm

• Configurations: Wheel drive (Male/Female) or Shaft drive variants.

Key Advantages

• High Power Density: The compact radial arrangement of the pistons allows for a smaller footprint than comparable axial piston motors with gearboxes, reducing total vehicle weight.

• Superior Mechanical Efficiency: Precision-ground cam rings and high-strength rollers ensure a high starting torque efficiency ($\approx 90\text{–}95\%$), critical for heavy-load startups.

• Dynamic Load Management: Equipped with heavy-duty tapered roller bearings, the MS18 is capable of supporting significant radial and axial forces, making it the ideal direct-drive motor for heavy vehicles.

• Integrated Options: Easily configurable with built-in multi-disc parking brakes and dual-displacement valves to balance speed and power requirements.

Application Areas

• Construction: Crawler drives for excavators, asphalt pavers, and drilling rigs.

• Mining: Cutting head drives for roadheaders and traction for underground loaders.

• Marine: High-torque winch drives, anchor windlasses, and crane slewing.

• Material Handling: Heavy-duty forklift drives and container handlers.

Expert Maintenance Tips

• Housing Fill: Always fill the motor case with clean hydraulic oil before initial operation. Air pockets inside the case can lead to catastrophic lubrication failure of the cam and piston interface.

• Drain Line Integrity: Ensure the case drain is connected to the highest port and returns directly to the tank. Maintain a positive case pressure as specified to avoid “piston separation” from the cam ring.

• Viscosity Control: For optimal life, maintain oil viscosity within the $20\text{–}50\text{ cSt}$ range. Operating in extreme heat without proper cooling will thin the oil and lead to premature wear of the valve plate.