Bosch Rexroth | AA4VG125EP3D132L-NSF52F001DP
AA4VG125EP3D1/32L-NSF52F001DP
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The AA4VG125EP3D1/32L-NSF52F001DP variable pump belongs to the AA4VG Variable Pumps series and is manufactured by Bosch Rexroth. It supplies adjustable hydraulic flow for automation systems that require precise energy transmission. The pump offers a geometric displacement of 125 cm³ per revolution, establishing the maximum volume moved with each shaft rotation. At the nominal speed of 2850 rpm it can provide 356 l/min, supporting high flow demands in mobile or industrial circuits. A nominal pressure rating of 400 bar permits continuous operation within heavily loaded drives, while the corresponding power requirement reaches 238 kW at that pressure and speed. When set to maximum displacement the shaft must deliver 796 Nm of torque, a figure used for sizing prime movers. Rotation is specified as counterclockwise, simplifying integration with standard engine couplings. Installation is handled through a SAE J744 2+4-hole mounting flange, ensuring interchangeability with common pump pads.
For short duty cycles the pump accepts a maximum pressure of 450 bar and may be accelerated to 3450 rpm, giving designers extra headroom during peak demand events. An integrated boost stage moves 28.3 cm³ per revolution to keep the main circuit charged and to prevent cavitation. The internal case pressure differential is limited to 2 bar, which protects housing seals and bearings. Electronic control uses a 12 V DC supply on the EP3 interface, allowing the pump displacement to be adjusted by on-board vehicle controllers. Fluid routing is supported by a M48 × 2 suction port that brings oil from the reservoir and a M33 × 2 drain port that returns case leakage, both conforming to ISO 6149 threads for straightforward hose selection. Pressure flow to actuators exits through SAE J518 1-1/4 in working ports A and B, completing the connection scheme for closed or open loop hydraulic drives.
Technical Specifications
Boost Pump Displacement
28.3 cm³/rev
Case Pressure Differential (continuous)
2 bar
Control Voltage (ep3)
12 V DC
Direction Of Rotation
Counterclockwise
Drain Port (t2)
M33 × 2 (ISO 6149)
Flow At Nominal Speed (vg Max)
356 l/min
Geometric Displacement
125 cm³/rev
Max Speed (intermittent)
3450 rpm
Maximum Pressure
450 bar
Mounting Flange
SAE J744 2+4-Hole
Nominal Pressure
400 bar
Nominal Speed
2850 rpm
Power At Nominal Speed (400 Bar)
238 kW
Suction Port (s)
M48 × 2 (ISO 6149)
Torque At Vg Max (400 Bar)
796 Nm
Working Ports A/b
SAE J518 1-1/4 in
1620 Old Apex Road
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