Technology: 2 Speed

Technology: 2 Speed

Two-Speed technology provides two operator selectable metered steering modes1 at any time, with the touch of a button or the flip of a switch. Two-Speed technology, available on the Series 10 Steering Control Unit, is suitable for Ackerman steered vehicles, including but not limited to agriculture tractors, combines, sprayers, and backhoe loaders.
Features

  • Open Center, Load Sense
  • All Integral Valves
  • Wide Angle
  • Max System pressure: 241 Bar [3500 psi]
  • Dual Steering Modes

Benefits

  • Reduced steering effort and operator fatigue
  • Increased efficiency during the work cycle
  • With both modes metered, steering remains very intuitive
  • Manual steering capability in unpowered mode (“emergency steering”)
  • Steering flow is always proportional to steering speed 
  • Allows for excellent roadability and operator selectable quick-steer for work cycles
  • All Ackerman Steering
  • Tractors, Telehandlers, Sweepers, Forestry Equipment, Backhoes, Loaders 
  • Sprayers, Combines, Motor Graders

1Typically, the gerotor between the SCU housing and the shift valve is the smaller gerotor (first gerotor). The shift valve is activated by the operator, which allows or prevents flow to the second gerotor. A separate solenoid valve provides the pressure pilot signal to shift the aforementioned valve. The OEM will define and provide the operator switch to activate the solenoid valve. Metered Steering Mode 1 – The steering unit operates the same as a traditional hydrostatic steering control unit. Steering (flow) is a function of steering wheel rotations (rpm). Metered (gerotor) steering provides precise, responsive, and smooth steering. All the flow is metered by the first gerotor, resulting in a greater number of turns lock-to-lock. In case of pressure loss, the shift valve automatically prevents flow to the second gerotor and emergency steering is available via the first gerotor. Metered Steering Mode 2 – The steering unit operates the same as a traditional hydrostatic steering control unit, except the flow is metered for a combined displacement of two gerotors. As with Mode 1, steering (flow) is a function of steering wheel rotations.As the total displacement per rotation is the sum of the two gerotor displacements, the number of turns lock-to-lock may be significantly decreased. Operator effort is greatly reduced during the work cycle. The number of turns lock-to-lock could go down to 0.5, where the ratio of the two gerotor displacements could vary from 1:1 to as high as 5:1, providing great flexibility in the design.
For drawings, pricing and leadtimes, please contact your local distributor