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Variable displacement pumps


(Series 10 & 30)

Variable displacement axial piston pump (A)A4VSO in swashplate design

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Variable displacement axial piston pump (A)A4VSO in swashplate design is available for open circuit applications. Sizes 40 & 71 are available in Series 10; sizes 125-250 are available in Series 30 and have the U99 Universal through-drive with coverplate. The flow is proportional to the input drive speed and displacement. By adjusting the swashplate angle, it is possible to infinitely vary the output flow. This rugged, low-noise pump is generally used in industrial 24/7 applications. A version with special bearings (code “F”) for water-content fluids up to 5000 psi and 1800 rpm is also available.


  • Sizes 40 to 250 cc
  • Axial piston swashplate design
  • Open circuit
  • Series 10 & 30
  • Combination of pumps of up to same size can be mounted to the thru-drive

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