Poclain MS05 MS08 MS18 Series Hydraulic Motor | MS05-2-113-F05-1230-DJ00 | Low Speed High Torque

The MS Series radial piston hydraulic motors from Chengyuan Hydraulic are low-speed, high-torque (LSHT) power components fully compatible with Poclain industrial standards. Utilizing proven cam-ring technology, these motors are specifically engineered for mobile machinery and heavy-duty industrial drives. The MS series (e.g., MS05-2-113) supports modular configurations, including integrated brakes, 2-speed controls, and speed sensors. Every Chengyuan motor undergoes 100% simulated full-load testing to ensure torque stability at extremely low speeds matches OEM performance, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Core Model Series: MS02, MS05, MS08, MS11, MS18, MS25, MS35, MS50

• Displacement Range (MS05): 260 mL/r to 930 mL/r

• Max Operating Pressure: 40 MPa (400 bar / 5800 psi)

• Peak Pressure: 45 MPa (450 bar)

• Max Output Torque: Up to 41,000 N·m (size dependent)

• Control Method: Single displacement or Two-speed (Twin-displacement)

• Output Options: Wheel flange or Splined shaft (Male/Female)

• Integrated Brake: Optional multi-disc friction hydraulic parking brake

Key Technical Advantages:

• Cam-ring & Roller Mechanical Efficiency: The MS series features a radial arrangement of pistons and rollers. Optimized cam profiles ensure high mechanical efficiency and smooth flow even at speeds as low as 1 rpm, eliminating stick-slip issues.

• Dual-Displacement Flexibility: Supports displacement shifting via an external pilot signal, allowing vehicles to switch seamlessly between work mode (high torque) and travel mode (high speed).

• High Radial Load Capacity: The housing is made of high-strength ductile iron and equipped with heavy-duty tapered roller bearings, allowing the shaft to sustain significant radial and axial forces—perfect for direct wheel mounting.

• Modular “Plug & Play” Design: The rear cover can be customized to integrate flushing valves, anti-skid valves, or brake-release controls, simplifying external hydraulic circuitry.

Application Areas:

• Construction Machinery: Skid steer loaders, excavator track drives, and vibratory rollers.

• Agriculture: Self-propelled sprayers and combine harvester drives.

• Specialty Vehicles: Airport tugs, mining haulers, and shipyard transporters.

Expert Maintenance Tips:

• Case Drain Pressure: The motor case must remain filled with oil during operation. Case drain pressure must not exceed 0.5 bar to prevent shaft seal failure and ensure internal lubrication.

• Pre-Priming Procedure: Before the initial startup, fill the motor housing through the highest drain port with clean hydraulic oil to prevent dry-running damage to the rollers and cam-ring.

• Fluid Cleanliness: To protect the precision distribution surfaces, system filtration must be maintained better than ISO 4406 20/18/15. Regular oil sampling is recommended for high-load applications.