User Manual
Table Of Contents
- Content
- 1 Overall hydraulic system
- 2 Steering hydraulics
- System concept
- Fully hydraulic steering (Emergency steering)
- Orbitrol axle = Floating axle (1), the rigid axle (2) is tracked by electro-hydraulic means
- Orbitrol axle = Rigid axle (2), the floating axle (1) is tracked by electro-hydraulic means
- The floating axle (1) and the rigid axle (2) are steered electro- hydraulically - the Orbitrol steering circuit is closed.
- Steering valve VI
- 3 Working hydraulics
000 293 646 0 - SYS-H XERION 3300 - 04/05 13
1 Overall hydraulic system
PFC pump
391
Description of function The PFC pump (2) is an axial piston pump.
PFC means:
– P (Pressure)
– F (Flow)
– C (Controlled)
PFC pump The compression spring of the volume flow controller (772) is designed so that
the pump pressure acting on the face end is always 20 bar above the load
pressure acting via port (7). This pressure of 20 bar is referred to as "Margin
pressure". The pressure controller (773) limits the pressure in the working
hydraulics circuit to 200±5 bar (Pressure relief valve function).