Closed Center Hydraulics

The closed center hydraulic system is a pressure and flow compensated (PFC) hydraulic system. The load-sensing system immediately initiates flow when required. When flow is no longer required, the pump returns to low pressure and to no-flow standby mode.

Pressure for the entire system is established by the function requiring the highest pressure. As demand lessens, so does hydraulic pump pressure and engine power requirements. The priority valve ensures, even at low idle engine speed, full power to the essential services like steering and brakes. Hydraulic and transmission systems utilize individual pumps, but share a common reservoir.

For additional information on operating hydraulic system functions see the following sections:

• Hitch and Drawbar Operation
• Selective Control Valve Operation