New Holland CX720 Repair Manual page 2477

Bypass Valve 8d-9d
When the bypass actuator (H), is turned 31/2 turns counterclockwise the force on poppet (J), is reduced. This sets
the pressure limiter valve at near zero setting. When the pump is not turning but pressure is generated in the high
pressure lines by the motor (motor acting as a pump), poppet (J), moves to the left, oil flows from port (X), through
opening (G), to port (Z). Plunger (C), will also move easily to the left allowing the pressurized oil from port (X), to flow
to port (Y). As pressure increases to the valve which equals spring (B), plunger (C), will move to the left and allowing
oil to flow directly from port (X), to port (Y), (oil keeps flowing from port (X), to port (Z)).
POWER TRAIN - TRANSMISSION Hydrostatic
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