Features
- Variable displacement Bosch Rexroth pump of axial piston and swashplate design for hydrostatic transmissions in closed circuits
- Flow is proportional to drive speed and displacement is infinitely variable
- Output flow increases with swivel angle from 0 to its maximum value, swivelling the swashplate over centre causes smooth reversal of the direction of flow
- The various control and regulating functions are catered for by the well-matched range of control and regulating devices
- The pump is equipped with a pair of crossline relief valves to protect the high pressure side of the pump transmission from overload. These valves also act as boost inlet valves
- In the standard model the A4V is supplied with a built-in auxiliary pump, which acts as boost supply and pilot pump
- Maximum boost pressure is limited by a built-in pressure relief valve
- Can be supplied with a through drive for mounting a gear pump as an additional boost pump or a further variable pump
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