BOSCH Rexroth A4FO Fixed Axial Piston Pump

Features Fixed pump in axial piston swashplate design for hydrostatic drives in an open circuit Use in mobile and stationary applications Flow is proportional to the drive speed and displacement. High power density High total efficiency Optimized dimensions for special installation situations Excellent suction characteristics Low noise level Long service life Economical design Through drive for combining additional pumps ▶ Sizes 22 and 28 – Nominal pressure 400 bar – Maximum pressure 450 bar ▶ Sizes 71 to 500 – Nominal pressure 350 bar – Maximum pressure 400 bar Safety instructions A4FO125 pump During start-up and operation, the pump housing must fill with hydraulic oil (injected into the housing cavity). It is necessary to start without load at low speed until the system is completely drained. When parked for a long time, the housing oil can drain through the working pipeline. When restarting, ensure that sufficient oil is injected into the housing. The minimum oil suction pressure at port S must not drop below 0.8 bar. Installation position The axis is horizontal at the bottom. When installing on the fuel tank, it is not allow to use the installation position of “shaft horizontal, oil suction port facing the bottom”! Installation below oil tank level The pump position is below the minimum oil level in the tank (standard) Fill the axial piston pump before starting through the highest position of the casing oil drain port Suggestion: Fill the oil suction pipeline Operate the pump at low speed (ignition speed) until the pump system is fully fill The minimum immersion depth of the suction or discharge pipeline in the fuel tank: 200 millimeters (relative to the minimum oil level in the tank). The installation position is higher than the oil tank liquid level Pumps install above the minimum oil level in the tank Å Installation position below oil tank level It is not allow to use the installation positions of “shaft against the top” and “shaft horizontal, oil suction port at the bottom” (during shutdown, the pump casing drains oil through the oil suction pipeline). Å Note: – Maximum allowable straw length hmax=800 mm