New Holland CX720 Repair Manual page 56

DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
High Pressure Circuit High Demand
1 Straw elevator stack valve
3 Pressure Compensating Valve
5 Swash Plate
When a high pressure service is operated the pressure rise in the hydraulic circuit is sensed by the load sensing line,
The combined pressure from the pilot line and flow compensating valve return spring causes the flow compensating
spool to move against the standby pressure in gallery (E), preventing the flow of oil to the swash plate servo piston
through gallery (C).
The movement of the spool opens gallery (D), to the return to sump gallery (C), allowing the servo piston to retract
under pressure from the swash plate return spring and adjust the angle of the swash plate to increase pump output.
High Pressure Circuit High Demand
Standby Pressure @ 190
bar (2755 psi)
Return to Reservoir
4
BSC1301B
2 Main frame stack valve
4 Flow Compensating Valve
6 Return from hydrostatic motors
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Charge Pressure