The rear rotor, which is connected to the front one by a flexible frame, can be pivoted to the left or right by a hydraulic cylinder. This makes it possible to rake a double swath or two single swaths. One double-acting spool valve is needed for this.
When raking a double swath, the rear rotor is pivoted to the left. It takes over the forage from the front rotor. The optional front swath curtain is raised.
The working width can be easily varied hydraulically by steering the rear rotor. Obstacles and wedge-shaped fields are no problem.
If the rear rotor is swivelled to the right and the front swath curtain is folded down, each rotor produces its own swath. This makes it possible to form two smaller night swaths, or two normal-sized swaths in the case of very high forage volumes.
The frame for the second rotor is mounted 650 mm in front of the axis of the first rotor. This ensures the rake stays on track when working on slopes and also provides enough overlap when cornering.
At the headland, the hydraulic working width adjustment system can also be used to pivot the rotor for perfect manoeuvrability.
The rear rotor is mounted in gimbals, which together with the freedom of movement in the frame joints allows excellent three-dimensional ground tracking of each rotor. Vertical freedom of movement is provided by a joint directly behind the angular gearbox. Transverse movement of the rear rotor unit is enabled by a pivot bearing mounted within the frame itself, and by a universal joint between the rear frame beam and the rotor unit.
One single-acting connection to the tractor hydraulics is all that you need for lifting. Stepping valves provide more convenient operation for raising and lowering the rotors. The front rotor is always lifted and lowered first. This ensures tidy work at the headland without damaging the existing swaths. With a ground clearance of 50 cm, you can drive over large swaths confidently.