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Accu Steer HRP11 Hydraulic Reversing Pump

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Product Description

Accu-Steer HRP11 Hydraulic Reversing pump medium-duty units designed to interface a hydraulic steering system with electric or autopilot control. Accu-Steer HRP11 output flow rate of the pumpset determines the speed of the steering cylinder.


  • Ignition protected (UL 1500 and SAE-1171).
  • Ball bearing shaft supports both ends.
  • Extended motor shafting eliminating the pump/motor coupling.
  • Machined pilot bore ensuring aligned pump/motor adapter mounting.
  • Cushioned foot mounts for quiet operation.
  • Opposite end shaft mount for tachometer/encoder.


  • The HRP11 pumpset outputs 1.0 cu in/sec or 16.4 cc’s/sec.
  • The reversing gear pumps (HRP’s) use gerotor style pump unit. The gerotor gear was used because of its quiet operation and its efficient pumping capabilities.
  • The gears are driven directly from the extended motor shaft which eliminate the need for a pump/motor shaft coupling.
  • The shaft is supported by the motor ball bearing on one side and a hard anodized aluminum end plate on the other side.
  • The gerotor pump is a two-piece gear assembly with an eccentric ring. Proper clearances and alignments are maintained through CNC precision machining.
  • Valve block sealing is accomplished using O-ring style seals.

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