Poclain MS Series Hydraulic Winch Motor | MS05 MS18 MS83 Radial Piston Motor | MS05-1-113 MS83-8-A11

The MS Series radial piston motors from Chengyuan Hydraulic are modular, low-speed high-torque (LSHT) power units fully compatible with Poclain engineering standards. Utilizing the multi-action radial piston principle, these motors deliver exceptional mechanical and volumetric efficiency. For critical winch applications using models like MS05-1-113 and high-displacement MS83-8-A11, we have optimized the precision of the stator cam profile to ensure smooth, creep-free torque output even at ultra-low speeds. Every MS series motor undergoes 100% simulated full-load condition testing to verify startup and braking performance against original OEM standards, ensuring 100% original-place interchangeability.

Technical Specifications :

• Model Codes: MS05-1-113-A05-2A10-0000, MS83-8-A11-A83-3A50-57JMO

• Displacement (MS05): 260 cm³/rev to 750 cm³/rev

• Displacement (MS83): 6603 cm³/rev to 10000 cm³/rev

• Nominal Pressure: 250 bar (25 MPa)

• Peak Pressure: 450 bar (45 MPa)

• Max Output Torque (MS83): Up to 40,000 Nm

• Maximum Speed: 100 – 300 rpm (displacement dependent)

• Minimum Stable Speed: < 1 rpm

• Control Method: Single displacement / Double displacement (1C/2C) control

• Configuration: Available with or without integrated hydraulic brakes (F05/F83)

Key Technical Advantages:

• Modular Multi-Action Construction: The MS series employs radially distributed pistons and a multi-lobe stator cam. This design generates multiple power strokes per revolution, yielding massive torque within a compact footprint. Stator profiles are secondary-ground for perfect force symmetry.

• Superior Low-Speed Stability: For winch lifting operations, smoothness at low speeds is vital. Chengyuan’s optimized distributor seal structure significantly reduces internal friction and leakage, allowing precise operation below 1 rpm and preventing load drifting.

• Extreme Radial Load Capacity: The main shaft is equipped with heavy-duty tapered roller bearings capable of directly supporting the massive radial loads from winch drums or wheel drives. The high-strength ductile iron housing ensures structural integrity at 450 bar peaks.

• 100% Interchangeability & Integration: All electrical and hydraulic interfaces are identical to original Poclain specifications. The design supports integrated valve blocks, such as 2-speed displacement shifters and brake controls, for direct “drop-in” replacement.

Application Areas:

• Winch Systems: Marine deck winches, trawler winches, and construction crane hoists.

• Mobile Machinery: Travel drives for excavators, rollers, and combine harvesters.

• Industrial Equipment: Heavy-duty mixers, scrap shredders, and TBM auxiliary drives.

Expert Maintenance Tips:

• Direct Case Drain Connection: MS series motors must be connected via the case drain port. Ensure case pressure remains below 2.0 bar to prevent shaft seal failure or internal distributor damage.

• Cleanliness Standards: Radial piston motors are highly sensitive to contaminants. Maintain precision filtration of 10μm or better to keep fluid cleanliness above NAS 1638 Grade 8.

• Initial Priming: After installation and before startup, fill the motor case with clean hydraulic oil through the drain port to lubricate the stator, rollers, and bearings. Never start the motor dry.