Bosch Rexroth | AA10VSO71DRG31R-PKC92K03
AA10VSO71DRG/31R-PKC92K03
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The AA10VSO71DRG/31R-PKC92K03 pump is part of the A10VSO Variable Pumps series produced by Bosch Rexroth for hydraulic automation where variable flow and pressure control are required. Its displacement is 71 cm³ per revolution, allowing the circuit to scale flow without changing driver speed. The unit is built for clockwise rotation so it mates with common engine or motor shaft directions. At 1,800 rpm and maximum displacement, it supplies 33.8 gpm (128 L/min) to meet medium-duty actuator demands. Inlet conditions must stay above 12 psi absolute and below 145 psi absolute to prevent cavitation and seal overload. The case drain line may carry up to 30 psi absolute, while an internal case volume of 0.420 gal stores leakage oil and moderates temperature rise. A maximum operating speed of 2,200 rpm at full stroke permits use with variable-speed prime movers.
The pump is rated for a nominal pressure of 4,100 psi and accepts peaks to 5,100 psi, giving designers a clear margin for transient loads. A standard differential pressure of 290 psi governs the DRG control so the swashplate automatically reduces displacement when system pressure climbs. When delivering 280 bar, the shaft must transmit 233 lb-ft of torque, and the driver must provide 79 hp at 1,800 rpm, which assists in motor selection. A rotating group inertia of 0.197 lb-ft² limits acceleration lag during rapid speed changes, and the assembly tolerates pressure rise rates up to 232,060 psi per second for fast valve actuation. Weight without a through drive is 78 lb, data needed for bracket sizing and mobile platform balance.
Technical Specifications
Case Drain Pressure Max (abs)
30 psi (2 bar)
Case Volume
0.420 gal (1.6 L)
Direction Of Rotation
Clockwise
Displacement
71 cm3/rev
Drg Differential Pressure (std)
290 psi (20 bar)
Flow At 1800 Rpm (vg Max)
33.8 gpm (128 L/min)
Inlet Pressure Max (abs)
145 psi (10 bar)
Inlet Pressure Min (abs)
12 psi (0.8 bar)
Max Speed At Vg Max
2200 rpm
Maximum Pressure
5100 psi (350 bar)
Moment Of Inertia (j)
0.197 lb-ft^2 (0.0083 kg·m^2)
Nominal Pressure
4100 psi (280 bar)
Power At 1800 Rpm, 280 Bar
79 HP (69 kW)
Rate Of Pressure Change Max
232060 psi/s (16000 bar/s)
Torque At 280 Bar (vg Max)
233 lb-ft (316 Nm)
Weight Without Through Drive
78 lb (35.2 kg)
1620 Old Apex Road
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