New Holland CX720 Repair Manual page 2774

To compensate for this the higher pressure on the non-slipping wheel side of the flow divider will move the flow divider
valve assembly towards the lower pressure (slipping wheel) side, limiting the hydraulic fluid flow to the slipping wheel
at the same time maintaining the pressure on the non-slipping wheel.
When the drive pressure equalizes in both wheel motor drive lines, the flow divider will move back to the center
position.
The flow divider also limits the maximum hydraulic fluid flow to each wheel motor. If both wheel motors should begin
to spin, the split flow dividers will separate due to the pressure acting on the 10.3 mm (0.406 inch ) orifice (4) in each
half of the spool. As the spools move apart the pressure to each drive motor will be limited to approximately 77.2 Lpm
(20.4 gpm ). The rear wheel drive system is therefore limited to a total of 154.4 Lpm (40.8 gpm ).
1 End Cap
3 Flow Divider Valve (2 per valve)
Forward and Reverse Check Valves
There are two check valve assemblies in the Equa-Trac II valve block, one for the forward drive and one for the reverse
drive. Each check valve assembly contains two check ball seats, two check balls and one spring.
The check valves prevent the full amount of return hydraulic fluid (at charge pressure) from the wheel motors from
flowing back through the check valve seats and flow divider orifices(s). This hydraulic fluid flow would create a large
pressure drop. The return hydraulic fluid pressure from the wheel motors will move the check balls off their seats
allowing some oil to flow through the check valve and through the center passage. The remaining oil will flow into
each end of the flow divider, past the selector spool to the return side of the hydrostatic pump.
TRAVELLING - 2WD-4WD SYSTEM Hydrostatic
DS00M069
2 4/7/2006
D.14.E / 20
6
2 Spring (2 per valve)
4 0.406 inch Orifice