Bosch Rexroth | AA10VSO140DFR31R-VKD62N00
AA10VSO140DFR/31R-VKD62N00
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The AA10VSO140DFR/31R-VKD62N00 variable displacement pump belongs to the A10VSO Variable Pumps series from Bosch Rexroth and delivers hydraulic oil to automated machinery at variable flow rates. It uses DFR pressure-flow control, which alters swash-plate angle so flow remains constant as pressure changes. Clockwise shaft rotation matches typical engine drives and prevents cavitation in right-handed layouts. A nominal pressure rating of 4 000 psi allows continuous duty, while the maximum pressure limit of 5 100 psi provides short-term overload capacity. The flow control differential is fixed at 200 psi, ensuring responsive displacement reduction when system resistance rises. A pressure cut-off value of 4 100 psi reduces piston stroke before the maximum rating is reached, protecting downstream components from excessive load.
The pump accepts inlet conditions between 12 psi and 435 psi absolute, giving designers latitude in reservoir height and boost-pump selection. Case drain pressure must stay below 29 psi absolute, and fluid returns through a 1 1⁄16-12 UN-2B drain port sized to maintain low backpressure. Supply oil enters through a SAE J518 2 1⁄2 in suction flange, and pressurized flow exits from a SAE J518 1 1⁄4 in pressure port; both service points sit on the side of the housing for compact installation. A 9⁄16-18 UN-2B pilot port provides an external control signal path, while FKM seals resist high temperature and aggressive fluids. The unit is built without a through drive, so it terminates the shaft line and simplifies mounting in single-pump systems.
Technical Specifications
Case Drain Port Size
1 1/16-12 UN-2B
Control Type
DFR (Pressure-Flow)
Direction Of Rotation
Clockwise (R)
Flow Control Δp Setting
200 psi
Max Case Drain Pressure (absolute)
29 psi
Max Inlet Pressure (absolute)
435 psi
Maximum Pressure
5100 psi (350 bar)
Min Inlet Pressure (absolute)
12 psi
Nominal Pressure
4000 psi (280 bar)
Pilot Port Thread
9/16-18 UN-2B
Port Orientation
Ports On Side (62)
Pressure Cut-off Setting
4100 psi
Pressure Port Size
SAE J518 1 1/4 in
Sealing Material
FKM (V)
Suction Port Size
SAE J518 2 1/2 in
Through Drive
None (N00)
1620 Old Apex Road
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