2 Steering hydraulics Standard steering 2, rigid axle is steered by Orbitrol steering unit 2184
Function Standard steering 2
In standard steering mode 2, the rigid axle (2) is steered entirely hydraulically, using the Orbitrol steering unit (steering wheel). The floating axle (1) is steered electro-hydraulically, but cannot be influenced. Steering of the floating axle (1) here is automatic as a function of the current steering angle of the rigid axle (2) and of the current steering program. At high vehicle speeds >20 km/h (road travel). the floating axle (1) is tracked in the straight ahead position. Standard steering 2 is active automatically under the following conditions: – The rigid axle (2) is the front axle in direction of travel.
– The road travel or fieldwork steering mode has been selected. – No special steering program is active. The steering hydraulics pump (218) supplies the Orbitrol steering valve (IV) and the proportional automatic floating axle steering valves (Y190-2a, Y1902b) with volume flow.The steering logics shut-off valves (Y188-3 and Y188-4) as well as the steering logics definition valves (Y189-5, Y189-6 and Y189-9) are energised. Example (see circuit diagram): The cab position actuates the steering sense valve (V).When turning the steering wheel, volume flow from port L of the Orbitrol steering valve (IV) flows through the actuated steering sense valve (V) and the definition valve (Y189-10) into the floating axle steering cylinder (323-2). During this process, volume flow is displaced from the other cylinder side and flows back into the Orbitrol steering valve (IV) via the energised definition valve (Y189-6). Now the rigid axle (2) is steered entirely hydraulically by the Orbitrol steering unit (steering wheel). The floating axle steering cylinder (323-1) receives volume flow via the energised proportional automatic rigid axle steering valves (Y190-2a or Y190-2b) and the energised steering logics shut-off valve solenoid valves (Y188-3, Y188-4). Control is by the electro-hydraulic steering module (A55).
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000 293 646 1 - SYS-H XERION 3300 - 01/06
