M+S MSY Hydraulic Motor | MSY-315-CJ-3 | MSY200 MSY250 MSY400 MSY475

The M+S MSY Series from LIC Hydraulic is a heavy-duty, disc valve hydraulic motor engineered for superior performance and durability. Utilizing advanced Geroler technology, models like the MSY-315-CJ-3 feature rollers in the displacement gear set to minimize friction and maximize mechanical efficiency. This series is designed for applications requiring high torque and high pressure. We guarantee 100% mechanical interchangeability with original M+S components. Every unit undergoes 100% load and internal leakage testing, ensuring stable operation at peak pressures up to $295\text{ bar}$.

Technical Specifications (Bulleted List)

• Series: M+S MSY Series (Disc Valve / Geroler)

• Displacements: $200.0, 250.0, 314.5, 400.0, \text{and } 474.6\text{ cm}^3\text{/rev}$

• Rated Pressure: Continuous $160\text{ bar}$ / Intermittent $210\text{ bar}$ / Peak $295\text{ bar}$

• Max Torque: Up to $1000\text{ N}\cdot\text{m}$ (depending on frame size)

• Max Speed: $150\text{–}375\text{ RPM}$

• Mounting: CJ (SAE A-4 Bolt Flange)

• Shaft Options: $25\text{ mm}$ Keyed, $1\text{ 1/4″}$ Splined, or Tapered options

• Porting: Side ports or Rear ports available

Key Technical Advantages

• Pressure-Compensated Disc Valve: The distribution valve rotates independently of the output shaft, featuring automatic pressure compensation. This ensures high volumetric efficiency and maintains peak performance even as the motor ages.

• Geroler Gear Set: Integrated rollers in the gear set reduce sliding friction, providing higher starting torque and smoother low-speed operation compared to standard Gerotor motors.

• High-Pressure Shaft Seal: The robust seal design accommodates high return line back-pressures. In many applications, an external case drain is not required, simplifying installation and reducing plumbing costs.

• Heavy-Duty Bearings: Tapered roller bearings on the output shaft provide exceptional radial and axial load capacity. This allows the motor to be used in direct-drive applications without additional support.

Application Areas

• Agriculture: Harvester header drives, seeding systems, and manure spreaders.

• Construction: Compact excavator track drives, auger drives, and sweeper brushes.

• Industrial: Metal balers, heavy-duty conveyors, and injection molding mold-adjustments.

• Marine: Fishing winches, net haulers, and deck machinery.

Expert Maintenance Tips

• Low-Speed Performance: If jerky movement occurs at low RPMs, verify that the system flow meets the motor’s minimum requirement and that the oil viscosity is within the optimal $20\text{–}75\text{ mm}^2\text{/s}$ range.

• Drain Line Recommendation: While the MSY is built for high back-pressure, connecting the case drain line is highly recommended if back-pressure exceeds $50\text{ bar}$ ($725\text{ psi}$) to extend seal life and reduce internal heat.

• Filtration Standard: The precision disc valve is sensitive to abrasive contamination. Ensure a system filtration level of at least ISO 18/16/13 ($20\text{ }\mu\text{m}$) to protect internal components and ensure long-term reliability.