Poclain MSE18 Hydraulic Motor Replacement | MS18 Radial Piston Wheel Motor

Genlu Hydraulic proudly introduces our industrial-grade MSE18 / MS18 Series radial piston hydraulic motors. This series is fully engineered to match global standards, providing a seamless, high-value drop-in replacement for Poclain Hydraulics legacy motors, particularly optimized for heavy-duty drive systems requiring high torque, low-speed stability, and dynamic braking capability. We specifically highlight our supply capability for precision-tuned units such as the MS18-2-A21-C12-1620-58DEFJM and MSE18-1-A21-T12-1620-5DEJM.

As the “workhorse” of mobile heavy machinery, the MSE18 series features multi-piston radial architecture that delivers smooth torque even at ultra-low rotational speeds. Genlu guarantees 100% Drop-in Interchangeability across mounting flanges, hub-spline connections, valve-block configurations, and internal rotating-group geometry compared to original Poclain MSE18 assemblies. Every motor undergoes 100% full-load volumetric efficiency, starting-torque, and pressure-integrity verification on our digital test benches, certifying responsive, durable, and elite rotational power for demanding field applications.

Technical Specifications 

• Product Series: Poclain MSE18 / MS18 Radial Piston Motor

• Representative Models: MS18-2-A21-C12-1620-58DEFJM, MSE18-1-A21-T12-1620-5DEJM

• Displacement: Variable (e.g., 1620 cc/rev nominal)

• Nominal Operating Pressure: 350 bar (Continuous)

• Peak Transient Pressure: 450 bar

• Maximum Starting Torque: Approx. 9000 Nm (at 350 bar)

• Maximum Speed: 100 – 150 rpm (Application-dependent)

• Control Logic: Multi-stage variable displacement (Hydraulic/Mechanical)

• Approximate Unit Weight: 220 – 250 kg

Key Technical Advantages:

• High-Pressure Radial Piston Power-Group: Utilizing precision-machined cam rings and radial piston sets, the motor provides instantaneous torque response under extreme pressures, outperforming conventional motor designs in low-speed torque delivery.

• Intelligent Multi-Displacement Control: Integrated valve blocks support multi-stage displacement shifting, allowing machinery to seamlessly switch between “high-torque climbing” and “high-speed transit” modes, enhancing overall operational efficiency.

• Heavy-Duty Hub Support Architecture: The high-ductility alloy casting housing features reinforced tapered roller bearings designed to handle significant radial hub loads directly, eliminating the need for complex external support structures.

• Superior Contamination-Tolerant Distribution: Precision-ground valve plates utilize high-performance materials to resist wear from particulate ingress, maintaining volumetric efficiency even in challenging mining and dusty field environments.

Application Areas:

• Heavy Construction Machinery: Tracked chassis drives, rotary drilling rigs, and heavy earthmoving equipment.

• Agricultural & Forestry Equipment: Harvester chassis drives and large-scale forestry harvesting machinery.

• Port & Industrial Transport: Heavy-load transporters, mobile cranes, and specialized industrial chassis systems.

Expert Maintenance Tips:

• Strict Case Drain Pressure Management: The radial piston motor is highly sensitive to case pressure. Always route the case drain line directly to the reservoir; never connect it to return lines. Backpressure in the housing will cause immediate failure of the shaft seal.

• Enforce Pre-Operational Priming: Never start the motor dry. Always fill the housing with clean hydraulic fluid through the highest drain port after mounting to ensure the pistons and cam surfaces are fully lubricated.

• Monitor Thermal Performance: High-load field operations can quickly degrade oil viscosity. If system temperatures consistently exceed 80°C, implement forced cooling. Maintaining correct viscosity is critical to preventing scuffing and oil-film failure on piston-shoe interfaces.