New Holland T8010 Manual page 459

1. RAISE SOLENOID
2. LOWER SOLENOID
3. LOCKOUT SOLENOID
4. LOCKOUT SOLENOID
5. UNLOAD VALVE
Suspended axle turned off
There is no power from the controller to any of the system solenoids. The oil in the system is trapped between
check valve (14), the check valve in the unload valve (5) and the relief valve (7). There will be no movement of the
axle unless the axle hits an object hard enough to blow oil over the relief valve (7) to tank. There will be no makeup
oil available to the system when in the off position. PFC supply is blocked at the raise solenoid (1) and the lower
solenoid (2).
Suspended axle in ride control mode
The lock out solenoids (3) and (4) are energized and oil is allowed to flow from the piston side to the rod side of the
cylinder and to the accumulator. The difference in the volume from the rod side to the piston side of the cylinder
and the pressure in the accumulator maintain the axle position.
When the axle hits a small bump, oil will be forced from the piston side through the lockout valve (4) and check (11)
to the rod side of the cylinder and through lock out valve (3) and orifice (9) to the accumulator. Oil moving into the
accumulator against the nitrogen charge absorbs the shock to the axle. No oil passes to tank, it is stopped at check
valve (14), check in unload valve (5), and relief valve (7).
To return the axle to its original position the increased pressure in the accumulator will force oil flow back to the
piston end of the cylinder through check valve (8). Oil displaced from the rod end of the cylinder will flow back
through orifice (12) and lockout valve (4) back to the piston end of the cylinder.
Section 25 - Four-Wheel Drive Front Axle - Chapter 5
3
4
6
12
11
6. RELIEF VALVE
7. RELIEF VALVE
8. CHECK VALVE
9. ORIFICE
10. RELIEF VALVE
19
10
14
9
8
7
11. CHECK VALVE
12. ORIFICE
13. ORIFICE
14. CHECK VALVE
15. ORIFICE
25-5-4
1
15
2
5
13
16. TANK
17. SUPPLY
18. SIGNAL LINE
19. ACCUMULATOR
18
17
16
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