Bosch Rexroth A10VSO28DRG/31L-VPA12N00 Axial Piston Pump Assembly

The Bosch Rexroth A10VSO28DRG/31L-VPA12N00 is a variable displacement axial piston pump designed for open-circuit hydrostatic drives. It features a swashplate design with a nominal displacement of 28 cm³ per revolution. The pump operates at a nominal pressure of 280 bar and a maximum pressure of 350 bar. It is configured with a DRG pressure control device, clockwise or counter-clockwise rotation (L suffix indicates left-hand rotation), and a VPA12N00 through-drive option. The unit mounts via an SAE B 2-bolt flange and accepts a parallel keyed shaft (splined shafts available). It is compatible with HLP mineral oils per DIN 51524. Typical operating speed ranges from 2000 to 3000 rpm. The pump weighs approximately 15 kg. It serves as a direct replacement for Rexroth part numbers R910930703, R902502732, and R902421254. Applications include main hydraulic circuits in mini excavators, skid steer loaders, truck-mounted cranes, and concrete pumps.