A10VO45 Rexroth Axial Piston Pump 280bar DFR1 Variable

Product Overview

The A10VO series (including A10VO28, A10VO45, A10VO71 and specific order codes A10VO45 DFR1/31R-PSC62K01, AA10VO71DFR1/31R-PSC62N00) is Bosch Rexroth’s axial piston variable pump in swashplate design for hydrostatic drives in open circuits. Flow is proportional to drive speed and displacement and can be steplessly varied by adjusting the swashplate angle. Our units deliver full interchangeability with OEM pumps—matching mounting dimensions, ports, and control characteristics—and undergo 100% simulated operating-condition testing for reliable drop-in replacement in mobile and stationary medium-pressure applications.

Technical Specifications 

(Data extracted from official Bosch Rexroth RE 92701 series technical manuals; Series 31 standard version; mineral oil, suction port pabs ≈ 1 bar)

• Model/Size: A10VO28, A10VO45, A10VO71 (Series 31; examples A10VO45 DFR1/31R-PSC62K01, AA10VO71DFR1/31R-PSC62N00)
• Geometric displacement Vg max: 28 cm³/rev (A10VO28), 45 cm³/rev (A10VO45), 71 cm³/rev (A10VO71)
• Nominal pressure pnom: 280 bar
• Maximum pressure pmax: 350 bar (limited single operating period; total operating period ≤ 300 h)
• Maximum rotational speed nnom (at Vg max): 3000 rpm (28), 2600 rpm (45), 2200 rpm (71); higher speeds permissible at reduced displacement
• Control: DFR1 (pressure and flow control, X-T channel plugged with flushing function); rotation R (clockwise, viewed on shaft end); other options include DR, DFR, DFLR
• Weight (approx., without through-drive): ≈15–18 kg (28), ≈21–23.5 kg (45), ≈33–35 kg (71)
• Additional: Open circuit; through-drive capable; flow at nnom and Vg max ≈ 84 L/min (28), 117 L/min (45), 156 L/min (71)

Key Technical Advantages

1. Precision swashplate design and high volumetric efficiency: Axial-piston swashplate architecture with precision piston-slipper pairing delivers high volumetric and overall efficiency, ideal for continuous medium-pressure duty with reduced energy loss.
2. Excellent suction characteristics and low noise: Optimized inlet geometry and housing ensure superior suction performance and quiet operation, improving machine comfort and reliability.
3. DFR1 combined pressure-flow control: Hydraulic pressure and flow regulation provides fast response and precise system matching, supporting load-sensing and energy-efficient operation.
4. Full interchangeability and through-drive compatibility: Flange, shaft end, ports, and control interfaces match OEM exactly; supports same-size through-drive for multi-pump combinations and true drop-in replacement.
5. 100% simulated duty-cycle testing: Every unit is verified under full pressure, speed, and control characteristics prior to shipment, guaranteeing parameter consistency and field-ready performance.

Application Areas

Open-circuit hydraulic systems in construction machinery (excavators, loaders, cranes), agricultural equipment, injection molding machines, machine-tool auxiliary circuits, industrial main/auxiliary oil sources, and any mobile or stationary application requiring compact medium-pressure variable control. A10VO28/45 suit medium-flow equipment; A10VO71 serves larger-flow main pumps.

Expert Maintenance Tips

• Fill the pump completely with hydraulic fluid and bleed air before start-up; never run dry. Maintain recommended absolute pressure at suction port. Use mineral oil ISO VG 32–68; optimal operating viscosity 16–36 mm²/s.
• Confirm rotation direction matches shaft-end marking (R/L). Do not exceed permissible input torque when using through-drive.
• Monitor case pressure and drain line; avoid overheating. Keep rate of pressure change ≤ 16000 bar/s.
• When replacing, match the full order code (control, series, shaft, flange, and ports as in DFR1/31R-PSC62K01) and verify dimensions to prevent installation-induced wear.