MS Series Radial Piston Hydraulic Motor Replacement | MS02 MS05 MS18 MS35

Genlu Hydraulic proudly introduces our industrial-grade MS Series radial piston hydraulic motors. Fully engineered to match the industry-standard MS architecture, this series provides a high-performance, seamless drop-in replacement for mobile and heavy-duty machinery. We specifically highlight our supply capability for precision-tuned units such as the MS02, MS05, MS08, MS11, MS18, MS25, and MS35 (e.g., MS35-2-D21-F50-1310-00-MR).

The MS series is renowned for elite starting torque, superior low-speed stability, and rugged load-bearing capacity. Genlu guarantees 100% Drop-in Interchangeability across mounting footprints, splined-shaft specifications, distribution-plate geometry, and performance curves compared to original MS Series assemblies. Every motor undergoes 100% full-load and volumetric-efficiency verification on our digital test benches, certifying rugged, consistent performance for your most demanding travel and swing applications.

Technical Specifications 

• Product Series: MS Series Radial Piston Hydraulic Motor

• Representative Models: MS02, MS05, MS08, MS11, MS18, MS25, MS35 (MS35-2-D21-F50-1310-00-MR)

• Displacement Range: 175 cc/rev to 6000 cc/rev

• Nominal Operating Pressure: 250 – 300 bar

• Peak Transient Pressure: Up to 350 – 450 bar

• Starting Torque Efficiency: Over 90%

• Shaft Style: Involute Splined / Keyed Shaft

• Mounting Configuration: Hub/Wheel-drive / Flange Mounting

Key Technical Advantages:

• High Starting Torque: The radial piston geometry delivers maximum torque instantly, eliminating issues with stalling or jerky startups under heavy loads.

• Elite Low-Speed Smoothness: Precision port-timing and high-strength connecting-rod mechanisms ensure continuous, stick-slip-free rotation, even at speeds as low as 1-5 rpm.

• High-Pressure Shock Resilience: Manufactured with high-strength forged/cast steel, critical rotating components resist damage from pressure transients, extending service life during rapid-cycling operations.

• Modular Flexibility: Supports dual-displacement configurations, integrated mechanical brakes, speed sensors, and various shaft outputs, ensuring a perfect fit for existing drivetrain assemblies.

Application Areas:

• Mobile Drives: Travel motors for excavators, loaders, and various off-highway vehicles.

• Swing Drives: Slew-drive systems for cranes and rotary power-heads for drilling rigs.

• Industrial Transmissions: Winch drives, industrial mixers, and recycling/shredding equipment.

Expert Maintenance Tips:

• Proper Case Drain Routing: Always route the motor case drain directly to the reservoir via an unrestricted line. Connecting to a back-pressured return line will lead to immediate seal failure and housing damage.

• Strict Fluid Cleanliness: MS series radial piston motors are highly sensitive to particulate contaminants. Maintain ISO 4406 18/16/13 standards and monitor return-line filter health regularly.

• Cold-Start Protocol: In sub-zero environments, allow the hydraulic system to run under no-load at low speeds for 5-10 minutes to bring the fluid to operating temperature, ensuring adequate lubrication of critical porting surfaces.