New Holland CX720 Repair Manual page 2778

When hydraulic fluid under charge pressure flows into the pressure to engage port on the E-T II valve, a "tee" fitting
at the port allows hydraulic fluid to flow to the drain valve as well. The charge pressure shifts the spool in the drain
valve so hydraulic fluid from the wheel motors is no longer allowed to drain back to tank through the drain valve.
A.
B.
C.
D.
TRAVELLING - 2WD-4WD SYSTEM Hydrostatic
DS00M060_939
2 4/7/2006
D.14.E / 24
10
Oil Supply from Low Pressure Spool
From Right Hand Side of Selector Spool Via External
Line
From Right Side of Selector Spool
To Case Drain