Bosch Rexroth | AA4VG90EP3DM132L-NSF52F021PP
AA4VG90EP3DM1/32L-NSF52F021PP
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The AA4VG90EP3DM1/32L-NSF52F021PP variable pump is part of the AA4VG Variable Pumps series from Bosch Rexroth and serves mobile or industrial hydraulic drives by translating shaft power into controlled oil flow. Its displacement is 90 cm³ per revolution, and the pumping group is set for counterclockwise rotation, so machine builders must match motor direction accordingly. When operated at the nominal speed of 3050 rpm with the swashplate fully stroked, it supplies 275 l/min to the circuit, supporting high flow demand in closed-loop transmissions. Continuous duty is limited to a nominal pressure of 400 bar to keep components within fatigue limits. The integrated boost stage moves 19.6 cm³ per revolution, maintaining a nominal boost pressure of 25 bar to avoid cavitation. Power is transferred through a 1 3/4 in 13T 8/16DP splined shaft that accommodates the torsional loads of heavy equipment.
The main hydraulic line may be pressurized to 450 bar for short periods, while the charge circuit can withstand boost pressure peaks up to 40 bar during rapid demand changes. At 400 bar the unit transmits 573 Nm of torque and absorbs 183 kW, figures used to size prime movers and couplings. Intermittent operation permits speeds up to 3800 rpm, extending the working envelope for dynamic duty cycles. Control electronics require a 12 V supply, making the pump compatible with standard vehicle wiring. Oil enters through a 1 5/8 in -12 UN-2B threaded suction port and exits via a 1 in SAE J518 working port that mates with common high-pressure flanges, streamlining installation into modern hydraulic systems.
Technical Specifications
Boost Pressure Max
40 bar
Boost Pressure Nominal
25 bar
Boost Pump Displacement
19.6 cm3/rev
Control Voltage
12 V
Direction Of Rotation
Counterclockwise
Displacement
90 cm3/rev
Drive Shaft Spline
1 3/4 in 13T 8/16DP
Flow At Nnom (vg Max)
275 l/min
Max Speed (intermittent)
3800 rpm
Maximum Pressure
450 bar
Nominal Pressure
400 bar
Nominal Speed
3050 rpm
Power @ 400 Bar
183 kW
Suction Port Thread
1 5/8 in -12 UN-2B
Torque @ 400 Bar
573 Nm
Working Port Size
1 in SAE J518
1620 Old Apex Road
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