Sauer Danfoss 51D160 Hydraulic Motor | 51D060 51D110 51D250 | Variable Displacement

LIC Hydraulic provides the Danfoss 51 Series, the global benchmark for bent-axis variable displacement motors. Specifically designed for high-pressure closed-circuit systems, the 51D (Cartridge) version, such as the 51D160, offers seamless integration into planetary gearboxes. With a peak pressure rating of 480 bar (6960 PSI) and a maximum swashplate angle of 32°, this motor provides an exceptional torque-to-speed ratio. Whether you are operating a heavy-duty harvester or a rotary drilling rig, the Danfoss 51 series ensures unmatched power density and precision control for mobile applications.

Technical Highlights

• High Displacement Ratio: Offers a wide speed range with adjustable angles from 7° to 32°, optimizing performance for both high-torque work and high-speed travel.

• Compact Cartridge Design: The 51D series minimizes axial installation space, making it ideal for wheel drives and integrated final drives.

• Proven Bent-Axis Technology: Provides high volumetric efficiency and high starting torque, essential for heavy-duty propulsion in rugged environments.

• Integrated Control Logic: Options like AD4N E2A7 allow for seamless electronic or hydraulic displacement control to maximize machine efficiency.

Application Areas

• Agriculture: High-performance drive systems for combine harvesters and sprayers.

• Construction: Propulsion motors for asphalt pavers, soil stabilizers, and drilling rigs.

• Industrial: Heavy-duty winches and rotary drives requiring high dynamic response.

Expert Maintenance Tips

• Mandatory Case Filling: To prevent catastrophic failure, the motor case must be pre-filled with filtered hydraulic oil through the drain port before the initial startup.

• Monitor Case Pressure: Maintain a case drain pressure below 5 bar to protect the shaft seal and ensure optimal internal lubrication.

• System Filtration: Due to the high precision of the bent-axis piston group, maintain a cleanliness level of ISO 18/16/13 to prevent “scoring” on the valve plate.