Bosch Rexroth | A10VO71DFR31R-PSC92K02
A10VO71DFR/31R-PSC92K02
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The A10VO71DFR/31R-PSC92K02 variable displacement pump is part of the A10VSO Variable Pumps series from Bosch Rexroth. It supplies pressurized hydraulic fluid for closed-loop or open-loop automation circuits that need adjustable flow. A displacement of 71 cm³ per revolution lets designers predict volume output for a given speed. At 1800 rpm the pump delivers 33.8 gpm, while 2200 rpm raises flow to 41.2 gpm for faster actuator response. The rotating group may run up to 2600 rpm during short duty periods, yet speed must be limited to 2200 rpm when operating at full displacement to avoid overstressing the assembly. A DFR controller holds a 200 psi differential pressure across the metering orifice so load-sense systems remain stable. Continuous operation is rated at 4000 psi, and connections rely on a 1 in SAE J518 pressure flange with a 2 in suction flange to minimize inlet losses. The internal case holds 0.420 gal of oil to collect leakage and aid cooling.
Peak working moments are accommodated by a 5100 psi pressure limit that covers brief system shocks. Shaft loading scales with pressure; 83 lb-ft is required at 100 bar and 233 lb-ft at 280 bar, data used to size the prime mover that drives the pump. The pilot circuit connects through a 7/16-20 UNF-2B port, giving a common interface for remote compensator or load-sense lines. Drain oil exits by a 7/8-14 UNF-2B thread so it can be routed back to the reservoir without mixing with the main suction line. Mounting considerations include a weight of 78 lb when no through drive is fitted; this figure influences bracket strength and allowable orientation during mobile service. Together these mechanical, pressure, and connection values guide implementation in hydraulic presses, injection machines, and similar installations.
Technical Specifications
Case Volume
0.420 gal (1.6 L)
Dfr Differential Pressure
200 psi (14 bar)
Displacement
71 cm³/rev
Drain Port Thread
7/8-14 UNF-2B
Flow At 1800 Rpm
33.8 gpm
Max Flow At 2200 Rpm
41.2 gpm
Max Permitted Speed
2600 rpm
Max Speed At Vg Max
2200 rpm
Nominal Pressure
4000 psi (280 bar)
Peak Pressure
5100 psi (350 bar)
Pilot Port Thread
7/16-20 UNF-2B
Pressure Port Size
1 in (SAE J518)
Suction Port Size
2 in (SAE J518)
Torque At 100 Bar
83 lb-ft (113 Nm)
Torque At 280 Bar
233 lb-ft (316 Nm)
Weight Without Through Drive
78 lb (35.2 kg)
1620 Old Apex Road
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