Bosch Rexroth | AA4VG125EP4D132L-NSF52F071DH-S
AA4VG125EP4D1/32L-NSF52F071DH-S
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The AA4VG125EP4D1/32L-NSF52F071DH-S variable pump is produced by Bosch Rexroth within the AA4VG Variable Pumps series and supplies adjustable hydraulic flow for closed-loop circuits in mobile or industrial automation. Its maximum displacement is 125 cm³ per revolution, and at the nominal speed of 2850 rpm the pump delivers 356 l/min to satisfy high-flow propel drives. A nominal pressure rating of 400 bar supports continuous duty, while a 450 bar ceiling accommodates brief overloads. Counter-clockwise shaft rotation aligns with standard engine layouts, and at 400 bar the unit transmits 796 Nm of torque together with 238 kW of power, data that guides prime-mover selection.
Electronic regulation parameters refine output for varying load conditions. The control circuit operates on 24 V with a ±20 % tolerance; swashplate movement initiates at 200 mA and reaches full stroke at 600 mA, while a 0.77 A current limit safeguards the coil. Solenoid resistance is 22.7 Ω at 20 °C, establishing expected current draw, and a 100 Hz dither frequency minimizes static friction for smoother response. The integrated boost stage displaces 28.3 cm³ per revolution to maintain charge pressure and prevent cavitation up to an intermittent speed of 3450 rpm. Together these control and auxiliary features support stable operation across the pump’s full working range.
Technical Specifications
Boost Pump Displacement
28.3 cm³/rev
Control End Current
600 mA
Control Start Current
200 mA
Control Voltage
24 V (±20%)
Current Limit
0.77 A
Direction Of Rotation
Counter-Clockwise
Displacement
125 cm³/rev
Dither Frequency
100 Hz
Flow At Nnom, Vg Max
356 l/min
Intermittent Max Speed
3450 rpm
Maximum Pressure
450 bar
Nominal Pressure
400 bar
Nominal Speed
2850 rpm
Power At 400 Bar
238 kW
Solenoid Resistance
22.7 Ω (20 °C)
Torque At 400 Bar
796 Nm
1620 Old Apex Road
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