A11VO75LRDS/10R-NSD12N00 Rexroth Variable Piston Pump 74 cm³ 350 bar

Product Overview

The A11VO75LRDS/10R-NSD12N00 belongs to the Bosch Rexroth A11VO / A11VLO series of high-pressure variable displacement axial piston pumps (sizes covering 40/60/75/95/130/145/190/260). Featuring a swash-plate design for open-circuit hydrostatic drives, flow is proportional to drive speed and displacement and can be steplessly varied. Fully interchangeable with genuine Rexroth units, it enables direct drop-in replacement without modification to mounting interfaces or piping. Every unit undergoes 100% simulated operating-condition testing to ensure high power density and reliability under high pressure.

Technical Specifications 

• Model: A11VO75LRDS/10R-NSD12N00 (series includes A11VO40 / 60 / 75 / 95 / 130 / 145 / 190 / 260)
• Displacement (Vg max): A11VO75 74 cm³/rev (series range 42–260 cm³/rev)
• Continuous / Rated Pressure: up to 350 bar
• Peak / Intermittent Pressure: up to 400 bar
• Maximum Speed: A11VO75 2550 rpm at Vg max (series 1800–3000 rpm depending on size)
• Control Type: Variable (LRDS power/pressure/load-sensing combination, code dependent)
• Design: Swash-plate axial piston, open circuit (A11VLO versions with charge pump)
• Weight: A11VO75 approx. 45 kg (series approx. 32–125 kg)
• Brand / Series: Bosch Rexroth A11VO / A11VLO high-pressure variable piston pump

Key Technical Advantages

1. High Power Density & Pressure Capability: Continuous rating of 350 bar and peak of 400 bar, combined with compact swash-plate design, deliver high flow and torque in limited space for heavy-duty mobile equipment.
2. Advanced Multi-Control Options: Supports power control, pressure control, load sensing and combinations (e.g. LRDS) for precise flow matching and system energy savings.
3. High Efficiency & Low Noise: Optimized swash plate and valve plate geometry maintain high volumetric efficiency while reducing operating noise and heat generation.
4. Robust Bearings & Extended Service Life: High-load-capacity bearings and precision manufacturing ensure reliable long-term operation under high-pressure, high-speed conditions.
5. True Interchangeability & Optional Charge Pump: Fully compatible with OEM mounting dimensions. A11VLO versions with charge pump improve suction performance, enabling rapid replacement and system upgrades.

Application Areas

• Main pump systems on construction machinery (excavators, loaders, cranes, bulldozers)
• Agricultural and forestry equipment hydraulic drives
• Port and material-handling equipment
• Industrial fixed hydraulic power units and high-pressure systems
• Any mobile or stationary application requiring open-circuit variable displacement performance

Expert Maintenance Tips

1. Ensure proper drive-shaft alignment during installation; use a flexible coupling and avoid excessive radial/axial loads. Verify correct rotation and suction/pressure port connections.
2. Use anti-wear hydraulic oil meeting ISO cleanliness and viscosity requirements; system filtration should be at least 10–20 μm. Thoroughly bleed air and check case pressure before initial start-up.
3. Regularly monitor suction pressure (≥0.8 bar absolute without charge pump) and case drain to prevent cavitation or over-pressure. Verify control setpoints.
4. During service, inspect pistons, cylinder block and valve plate for wear; replace complete rotating groups when necessary. Store long-term units in a dry environment and rotate the shaft periodically.