A11VLO190DRS/11R-NPD12N00 Rexroth A11VLO190 Hydraulic Pump 193cc 350bar

Product Overview

 The A11VLO190DRS/11R-NPD12N00 is a high-precision, fully interchangeable replacement for the Bosch Rexroth A11V(L)O series open-circuit swashplate axial piston variable pump. Equipped with an integral impeller charge pump, this model supports higher operating speeds and is ideal for mobile machinery, construction equipment, and industrial hydraulic systems. Flow is proportional to drive speed and displacement and can be steplessly varied between maximum and zero. Every unit undergoes 100% simulated operating condition testing to guarantee exact dimensional, interface, control, and performance interchangeability with original Rexroth A11VLO190 pumps—enabling true drop-in replacement. It is also compatible with related sizes including A11VO40, A11VO60, A11VO75, A11VO95, and A11VO130.

Technical Specifications 

• Model: A11VLO190DRS/11R-NPD12N00 (Rexroth A11VLO series with charge pump)
• Displacement (Vg max): 193 cm³/rev
• Nominal Pressure (pnom): 350 bar
• Maximum Pressure (pmax): 400 bar
• Maximum Speed (with charge pump, at Vg max): 2500 rpm
• Output Flow (at nnom and Vg max): approximately 483 L/min
• Input Power (at nnom, Vg max, Δp = 350 bar): approximately 281 kW
• Torque (at Vg max, Δp = 350 bar): approximately 1075 Nm
• Control Type: DRS (pressure cut-off with load-sensing related functions; configurable for pressure compensation, power control, electro-proportional, etc.)
• Weight (approx.): 104 kg
• Housing Material: High-strength cast iron
• Mounting Flange: SAE standard
• Circuit Type: Open circuit
• Compatible Fluids: Mineral hydraulic oils (within recommended viscosity range)
• Related Series Sizes: A11VO40 (42 cm³), A11VO60 (58.5 cm³), A11VO75 (74 cm³), A11VO95 (93.5 cm³), A11VO130 (130 cm³)

Key Technical Advantages

1. Integral Impeller Charge Pump (A11VLO feature): Significantly improves suction performance, enabling higher speeds up to 2500 rpm while reducing cavitation risk—especially beneficial for high-speed mobile applications and cold starts.
2. Precision Swashplate Variable Design with High Power Density: Stepless flow control combined with compact construction delivers high power density at 350 bar nominal pressure for demanding continuous-duty cycles.
3. Versatile Control Options and Through-Drive Capability: DRS control provides pressure cut-off and load-sensing functionality; supports power limiting and electro-proportional controls. Through-drive design allows tandem mounting of additional pumps up to the same nominal size for flexible multi-pump systems.
4. High-Strength Materials and Optimized Bearing System: Premium cast-iron housing with precision-machined port plate and piston components ensure high volumetric efficiency, low noise, and extended service life under severe operating conditions.
5. Full Interchangeability and Rigorous Testing: 100% simulated condition testing guarantees exact match of mounting interfaces, shaft ends, and control ports to original equipment, minimizing downtime and retrofit costs.

Application Areas

• Construction machinery (excavators, wheel loaders, cranes, dozers – main or auxiliary pumps)
• Mobile equipment and specialty vehicle hydraulic systems
• Industrial open-circuit power units (presses, injection molding machines, material handling)
• Multi-pump tandem systems requiring high speed and high power density
• Medium- to high-pressure open-circuit hydrostatic drives

Expert Maintenance Tips

• Ensure absolute inlet pressure meets requirements (recommended ≥0.6–0.8 bar for charge-pump versions); size suction lines adequately to prevent cavitation.
• Fully bleed the system before initial start-up and verify control and drain line pressures remain within specified limits.
• Maintain fluid cleanliness at ISO 4406 18/16/13 or better and replace filters regularly.
• Avoid prolonged simultaneous operation at peak pressure and maximum speed to maximize bearing and port-plate life.
• Use correct seal kits during service; when using through-drive, ensure torque distribution stays within allowable input and through-drive torque limits.
• Periodically inspect the swashplate and piston assembly for wear and operate within the recommended viscosity range.