Bosch Rexroth | AA10VO71DFR31R-PSC92K07
AA10VO71DFR/31R-PSC92K07
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The AA10VO71DFR/31R-PSC92K07 variable pump belongs to the A10VSO Variable Pumps series from Bosch Rexroth and supplies regulated oil flow in mobile and industrial hydraulic circuits. Its displacement of 71 cm³ per revolution allows the circuit designer to size actuator volume accurately. At 1800 rpm the pump delivers 33.8 gpm, providing sufficient flow for medium-power drives. When run at the maximum setting, the speed limit is 2200 rpm so the unit can respond to higher demand without cavitation. That higher speed raises attainable flow to 41.2 gpm, giving the system extra capacity during peak duty cycles. A built-in DFR control keeps differential pressure at 200 psi between the outlet and load-sensing line, maintaining constant actuator speed under varying load. The same control limits flow deviation to 0.74 gpm, helping hold positional accuracy in proportional valve circuits. Nominal pressure capability is 4000 psi, enabling the pump to drive cylinders or motors that require high working pressure.
The pump withstands transient spikes up to 5100 psi so pressure shocks from rapid directional changes do not damage internal components. A case volume of 0.42 gal stores leakage oil, which cools and lubricates rotating groups before returning to tank. The case drain port is threaded 7/8-14 UNF-2B to connect a return hose that keeps housing pressure below the allowed maximum. That housing pressure must stay under 29 psi, protecting shaft seals from extrusion. Control pilot oil is accepted through a 7/16-20 UNF-2B port, allowing external electronics to trim displacement independently of the main outlet. System flow exits through a 1 in SAE J518 pressure flange, giving a robust high-pressure connection. Inlet oil enters via a 2 in SAE J518 suction flange sized to minimize inlet velocity and avoid cavitation. Viewed on the shaft, rotation is clockwise so drive coupling orientation can be matched during installation. The assembly weighs 73 lb, allowing a single technician to mount it with standard lifting eyes.
Technical Specifications
Case Drain Port
7/8-14 UNF-2B
Case Drain Pressure (abs Max)
29 psi (2 bar)
Case Volume
0.42 gal (1.6 L)
Dfr Differential Pressure (standard)
200 psi (14 bar)
Displacement
71 cm³/rev (4.33 in³/rev)
Flow At 1800 Rpm
33.8 gpm (128 L/min)
Flow Deviation Max (dfr)
0.74 gpm (2.8 L/min)
Max Flow At Nmax
41.2 gpm (156 L/min)
Max Speed At Vgmax
2200 rpm
Nominal Pressure
4000 psi (280 bar)
Peak Pressure
5100 psi (350 bar)
Pilot Port (x)
7/16-20 UNF-2B
Pressure Port (b)
SAE J518 1 in
Rotation (viewed On Shaft)
Clockwise
Suction Port (s)
SAE J518 2 in
Weight (without Fluid)
73 lb (33 kg)
1620 Old Apex Road
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