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A4VSO - the continuous operator:
Over 10,000 pumps in service worldwide


Regarding supply of pressurized oil for the electro-hydraulic control of the combustion process in a large engine, ruggedness and a high level of efficiency are the critical factors:

With the proven swashplate design of the A4VSO axial piston pump, Rexroth has established itself as market leader for large 2-stroke engines.

It provides variable volume flow adjustment and very good priming properties with low noise level and rapid control response. It is very reliable and minimizes unscheduled downtimes.

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The core element of the hydraulics

More than 10,000 pumps have gone into service since 2002, ensuring uninterrupted reliable operation of large engines with electro-hydraulic control. It's modular design approach enables the A4VSO to be adapted very effectively to the specific conditions and requirements of each application.

For the ship to move in reverse, the large 2-stroke engine has to change the direction of rotation. The pump rotation reverse too, naturally. The A4VSO precisely provides the required volume flow precisely regardless.

It provides:

  • Durability
  • Variable volume flow adjustment
  • Low noise level
  • Rapid control response
  • Very reliable
  • Minimizes unscheduled downtimes
Main pumps for the oil supply on the engine