Rexroth Hydraulic Pump for A4FO series The A4FO fixed pump is designed for operation with HLP mineral oil according to DIN 51524.The hydraulic fluid should be selected such that the operating viscosity in the operating temperature range is within the optimum range Sizes 22 and 28 - Nominal pressure 400 bar - Maximum pressure 450 bar Sizes 71 to 500 - Nominal pressure 350 bar - Maximum pressure 400 bar Features 1. Fixed pump in axial piston swashplate design for hydrostatic drives in an open circuit 2. For use in mobile and stationary applications 3. Flow is proportional to the drive speed and displacement. 4. High power density 5. High total efficiency 6. Optimized dimensions for special installation situations 7. Excellent suction characteristics 8. Low noise level 9. Long service life 10. Economical design 11. Through drive for combining additional pump