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
28 000 293 646 0 - SYS-H XERION 3300 - 04/05
2 Steering hydraulics
System concept
413
Definition of axles The floating axle (1) is always located below the engine, regardless of the cab
position.
1 = Floating axle 2 = Rigid axle
1 = Floating axle 2 = Rigid axle
Fully automatic steering opera-
tion. Special steering programs
In the special steering programs (e.g. Autopilot, crab steer mode), the front and
the rear axle are steered by electro-hydraulic means. These special steering
programs are available only for fieldwork. Transmission of the steering
commands is fully electronic.
Emergency steering safety
concept
In case of disturbances, the steered axles are brought to a "safe condition". A
"safe condition" is defined as both axles being steered simultaneously and by
purely hydraulic means, using the Orbitrol (steering wheel). To achieve this, the
steering cylinders of the floating axle and of the rigid axle are connected in
series, using the definition valves. The oil supply is ensured by the wheel-driven
emergency steering pump (245). The steering angles of the floating axle and of
the rigid axle are identical, but have their senses reversed.