Fixed-displacement axial-piston pump A2FO23/61L-VPB05

A2FO23/61L-VPB05, manufacturer material number R902247281, is a Bosch Rexroth A2FO series 61 fixed-displacement bent-axis axial-piston pump for open hydraulic circuits. Nominal size 23 has a published geometric displacement of 22.9 cm³/rev. This FKM-sealed execution rotates counter-clockwise when viewed at the drive shaft, delivering from suction port S to pressure port A.

The execution uses Parallel keyed shaft, DIN 6885 AS8x7x40 and a four-hole ISO 3019-2 mounting flange. The side pressure connection has 1/2 inch SAE J518 flange dimensions and the rear suction connection 3/4 inch flange dimensions. The manufacturer specifies metric fastening threads as a deviation from SAE J518; these inch sizes do not denote pipe threads.

Nominal 400 bar and maximum 450 bar are absolute high-pressure-port limits for mineral oil. Maximum pressure permits at most 10 seconds per period and 300 cumulative hours. The 2500 rpm reference maximum speed requires 1 bar absolute suction pressure and viscosity 16–36 mm²/s. The 4750 rpm limiting speed needs increased inlet pressure according to the manufacturer curve. The 57 L/min reference flow is theoretical, without efficiency or tolerances.

The continuous fluid-temperature reference is −25 to +90 °C at port T with permissible viscosity. The case must remain filled, air must be bled, and the appropriate drain port must be connected according to installation position. Case-to-ambient differential pressure, seal temperature, bearing loads and inlet pressure have separate limits in the original pages; the suction-port pressure allowance does not override the case-seal limit.

The technical reference is the original manufacturer publication RE91401, edition 2012-06. Its archive edition is disclosed; no later edition or unverified special execution is implied. A binding article-specific installation drawing should be obtained before final design. Representative Bosch Rexroth A2FO series 6 manufacturer photograph; shaft, size, ports and rotation may differ from the individual execution.