New Holland T8010 Manual page 852

Float
When the remote hydraulic control lever is moved to
the float position, the main valve spool is moved to
the far right position by the proportional solenoid
pressure supply.
The main valve spool lands block flow to the extend
and retract ports. At the same time the main valve
spool opens the work ports to the return to filter inlet.
To unseat the load check on the raise por t low
2
1
10
1. EXTEND PORT
2. RETRACT PORT
3. LOAD CHECK PLUNGER
4. MAIN VALVE SPOOL
5. PRESSURE COMPENSATED FLOW CONTROL SPOOL
6. PROPORTIONAL SOLENOID (EXTEND)
7. PROPORTIONAL SOLENOID (RETRACT)
8. PFC PUMP SUPPLY
Section 35 - Hydraulic Systems, 3PT - Chapter 5
6
14
13
9
11
35-5-21
pressure standby pressure is direc ted to the
backside of the load check plunger. The plunger
moves to the right, unseating the load check main
poppet.
W hen t he ex ten d and r e trac t wo r k po r ts a r e
connected to the return to filter inlet it allows the
implement to float and follow the contour of the
ground. The valve will now float a double acting or
single acting cylinder.
3
7
4
5
15
8
9. REGULATED PRESSURE SUPPLY
10. BACK TO TANK
11. SIGNAL LINE TO COMPENSATOR
12. TO REMOTE SIGNAL RELIEF VALVE
13. PILOT DRAIN
14. SIGNAL CHECK TO PUMP COMPENSATOR
15. SIGNAL CHECK PILOT RELIEF
9 12
13
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