AA10VSO10DR/52R-PKC64N00 ESO938

The AA10VSO10DR/52R-PKC64N00 ESO938 is a pump produced by Bosch Rexroth within the A10VSO Variable Pumps series. It serves as an adjustable displacement source in hydraulic automation where accurate pressure regulation and consistent flow are necessary. The unit follows an axial piston swashplate arrangement, allowing the displacement to vary as the plate angle changes. It runs in an open-circuit configuration so supply fluid is drawn from the tank and returned without internal recirculation. Rotation is clockwise, matching drive trains that turn right-hand shafts. Flow is routed from port S to port B, simplifying circuit layout in mobile and industrial machinery. A built-in pressure controller of the DR type continuously adjusts the swashplate to hold the system near the designated working level, which for this model is a nominal 4,100 psi (280 bar).

The hydraulic section is rated for a maximum working pressure of 5,100 psi (350 bar), and the same limit applies to the pilot control port to keep auxiliary circuitry within the main housing. Inlet conditions must not drop below 12 psi (0.8 bar) absolute to prevent cavitation, while oil trapped in the case must stay below 30 psi (2 bar) absolute to avoid seal damage. The pump withstands rapid transients because the allowed pressure rise reaches 232,060 psi per second (16,000 bar per second). There is no through drive, so the shaft cannot pass power to additional pumps in tandem arrangements. Combined, these limits define safe operating boundaries and enable reliable pressure cycling in automated hydraulic systems.