Selective Control Valves-General Information

NOTE: Flow to the highest pressure demands will be decreased when total flow demand exceeds the available pump flow at the desired engine speed. Reduced cylinder cycle times and/or a reduction in motor speed may result.

Performance and efficiency of the hydraulic system depends upon:

  • Correct connection of implement hydraulic couplings
  • Correct adjustment of auxiliary controls
  • Compatibility of the implement components to a "power-on-demand" load sense system
  • Tractor SCV control settings (flow and detent time)
  • Total remote flow requirements

Tractor/implement operating characteristics are influenced by the following:

  • Maximum pump output flow is 168 L/min (44 gpm) at 2100 engine rpm
  • Available flow is dependent on engine rpm
  • Flow priority in the secondary circuit is to the lowest pressure function
  • Maximum pump output pressure is 20 000 kPa (200 bar) (2900 psi) (high pressure)
  • Pump will operate at high pressure if flow restrictions limit the actual flow to an amount less than that commanded by the SCV flow control setting
  • Best efficiency results when operating at the minimum pressure and flow requirements
  • Total pump flow is at the pressure of the highest individual load pressure

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