New Holland T8010 Manual page 798

16
1. SIGNAL LINE PRESSURE
2. PUMP CASE DRAIN
3. CONTROL PISTON PRESSURE
4. PISTON PUMP OUTLET PRESSURE
High Pressure Standby
When the hydraulic cylinder reaches the end if its stroke or an unconnected remote valve is operated, the hydraulic
system is protected by limiting its maximum pressure to 3250 psi (224 bar) through a signal relief valve. The hitch
system pressure is not limited by a signal relief valve.
When the pressure in the system reaches the setting of the high pressure compensator spool the pump high
pressure compensator spool will shift against its spring. The movement of the spool allows the full pump delivery
pressure to be applied to the pump control piston to destroke the pump very rapidly from full stroke to almost zero.
(Within 8 to 10 milliseconds). The swash plate will stabilize in a position to provide just sufficient flow to make up
internal leakage to maintain the maximum pressure limit of 3250 psi (224 bar) in the hydraulic system.
Section 35 - Hydraulic Systems, 3PT - Chapter 2
18
15
4
3
14. OUTLET PORT (NOT SHOWN)
15. FLOW COMPENSATOR SPOOL
16. HIGH PRESSURE COMPENSATOR SPOOL
17. HIGH PRESSURE SPRING
19
21
1
2
35-2-41
17
18. FLOW COMPENSATOR SPOOL
19. HIGH PRESSURE COMPENSATOR SPOOL
21. COMPENSATOR ASSEMBLY
RH02B010