THEORY OF OPERATION - CONTINUED
BRAKE AND HYDRAULIC FAN SYSTEM - CONTINUED
When a constant flow of hydraulic oil is demanded by hydraulic system, supply oil pressure from pump
outlet will be constant. Oil supply will flow at a constant rate until pressure at load sensing port changes.
Margin spring force and pressure from load sensing port act on one end of flow compensator spool. Pump
outlet pressure acts on opposite end of flow compensator spool.
When pressures acting on ends of flow compensator spool equalize, flow compensator spool will meter oil
to actuator piston through signal passage. Force behind actuator piston will equalize with bias spring force.
Swashplate will be held at a relative constant angle to maintain required oil flow. Flow of hydraulic oil to
system will stabilize.