90M075NC0N7N0S1 Danfoss Series 90 Axial Piston 75cc 450bar

Product Overview

The 90M055 / 90M075 / 90M075NC0N7N0S1W00NNN0000E6 / 90M055NC0N8N0S1-W00NNN0000E6 belongs to the Danfoss (Sauer-Danfoss) Series 90 axial piston units suitable for closed-circuit pump or motor applications. It offers true drop-in interchangeability with original Danfoss units—SAE-standard mounting flanges—so no piping modifications are required. Every unit is 100% tested under simulated operating conditions to guarantee reliable performance in high-pressure closed systems. Available in fixed or variable displacement configurations, it supports high working pressures and delivers strong torque output for propel and transmission systems.

Technical Specifications 

• Model: 90M075NC0N7N0S1 / 90M055NC0N8N0S1 (Series 90)
• Displacement: 90M075 75 cm³/rev; 90M055 55 cm³/rev
• Maximum working pressure: 450 bar
• Peak pressure: 480 bar
• Rated speed: 90M075 3600 rpm; 90M055 3900 rpm
• Maximum speed: 90M075 3950 rpm; 90M055 4250 rpm
• Control type: Fixed or variable (depending on configuration)
• Weight: 90M075 approx. 49 kg; 90M055 approx. 40 kg
• Circuit compatibility: Closed

Key Technical Advantages

1. Precision axial piston design: High volumetric efficiency with low internal leakage for excellent system energy efficiency.
2. High pressure and high torque: Supports 450 bar continuous operation with strong and reliable torque output.
3. Compact high power density: Suitable for confined installation spaces in mobile equipment.
4. Drop-in interchangeability and wide size range: Standard interfaces covering a broad displacement range for easy system replacement.
5. Long-life bearings and reliable sealing: Designed for continuous high-pressure and shock-load operation.

Application Areas

• Propel drives on construction machinery
• Agricultural and forestry hydrostatic transmissions
• Industrial vehicles and special equipment
• High-pressure closed-circuit systems
• Pump/motor applications requiring high torque output

Expert Maintenance Tips

Ensure charge and suction lines are adequately sized; route case drain independently. Fully bleed the system before first start-up and maintain high fluid cleanliness. Use recommended viscosity hydraulic oil and inspect filters and oil temperature regularly. Avoid overpressure and overspeed. For long-term storage, fill with clean oil and seal all ports.