Poclain MS25 MS35 MS50 Motor | MS25-2-111-A25 | Two Speed Variable Motor | MS11 MS18 MS83

Poclain MS Series Two-Speed Variable Radial Piston Hydraulic Motors

Product Overview: The Poclain MS Series stands as the global powerhouse for heavy-duty hydrostatic drive systems. As a high-performance Low Speed High Torque (LSHT) variable unit, this series supports Two-Speed functionality, allowing machinery to achieve a perfect balance between speed and torque by shifting displacement without altering pump flow. This selection covers the full spectrum from compact MS11 and MS18, to mainstream heavy-duty frames MS25, MS35, and MS50, up to the ultra-heavy MS83. The featured configuration MS25-2-111-A25-2A50-0000 is renowned for its reliability in excavator travel drives, large combine harvesters, rotary drilling rigs, and forestry equipment.

Key Technical Advantages:

• Two-Speed Variable Technology: Features an integrated displacement shift valve, supporting smooth transitions between full displacement (Work Mode) and reduced displacement (Travel Mode) for maximum tractive effort and high-speed roading.

• Series 2 Optimization: The “-2-” designation represents second-generation design, featuring upgraded back-pressure tolerance and superior volumetric efficiency under high-pressure duty cycles.

• Integrated Heavy-Duty Braking: Modular housings seamlessly integrate multi-disc wet parking brakes (e.g., A25 specs), ensuring absolute safety for heavy-load incline holding.

• Elite Low-Speed Smoothness: Utilizing Poclain’s patented cam-ring technology, these motors ensure constant torque output even at speeds near 0 RPM, eliminating “stick-slip” for precise maneuverability.

• Extreme Power Density: Delivers massive output power within restricted wheel hub envelopes. Rated for continuous operation at 400 Bar (5800 PSI) with peak capabilities reaching 450 Bar.

• Target Applications: Wheel loader propulsion, heavy-duty road rollers, specialized chassis travel, and port crane travel drives.

Detailed Models & Parameters:

• Core Series: Poclain Hydraulics MS Series (Two-Speed/Variable).

• Model Keywords: MS11, MS18, MS25, MS35, MS50, MS83, MS25-2-111, A25 Brake.

• Technical Specs Decoding (MS25-2-111-A25-2A50):

  • MS25-2: Frame size 25, Series 2 design with reinforced bearings for extended service life.

  • 111: Denotes specific distributor cover and standard porting configurations.

  • A25: High-performance integrated wet braking module.

  • 2A50: Refers to the two-speed displacement settings (Full vs. Reduced ratio).

• Performance Specs: Maximum output torque spans from 3,000 Nm up to 80,000 Nm, engineered for continuous high-pressure operation.