Four-rotor rakes GA 10231 Series

The homogeneity and volume of the windrows are prerequisites for rapid drying and easy pickup by the balers. The tine arms of the GA rakes are positioned hyper tangentially. This means that they reach a 90° angle very late. Combined with the tines' steep slope cam, tine clearance is quick, later and requires little turning effort. The windrows thus formed are more regular, voluminous and straight. Windrowing is better even at high speeds because the crop is not pushed beyond the windrow.
Strengths of the angled arms:
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They reduce the distance between the tine passes. Forage loss is kept to a minimum even at high ground speeds.

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• The weight is in the center of the tine arm. This increases its service life, because it is not subjected to any pressure during its rotation. The guide rollers are thus less exposed to stress.

To protect the soil and the plant cover, optimal adaptation of the rotors to the changing terrain is just as important as low ground pressure that limits compaction.
KUHN's four rotor rakes are fully equipped to meet these requirements:
Suspended from the junction of a pivot point and independent of the main frame, the rotors can swivel in all directions thanks to the 3D rotor pendulum joint. They precisely and efficiently follow the variations in the terrain. The result: a flawless performance, the assurance of a clean crop and a healthy plant cover.
The wide tyres help to reduce soil compaction and ensure the stability of the rotors, even on slopes. Stability on slopes is also the strength of the optional radial tyres.
Each rotor is equipped with four pivoting wheels. This ensures that the plant cover is preserved, even in tight turns. Thanks to their position close to the tines, the rotors adapt immediately and efficiently to changes in the terrain.
The front rotors are now suspended by hydraulic cylinders, which means a more precise adjustment of the suspension. In addition, the ground pressure is automatically corrected depending on the working width. The user can therefore easily adapt the machine to the working conditions. A hydraulic reduction of the rear rotors is also available as optional equipment. It ensures a load transfer to the machine frame, thereby increasing stability when working on steep slopes. A hydraulic cylinder placed in front of the rotor head controls its lowering. Like an aeroplane, the rear is lowered first, then the front. The tines do not come into contact with the soil thanks to this STABILIFT jet effect.

The electronic architecture includes a new ISOBUS module. The latter is more powerful, has more capacity and offers more possibilities. The ISOBUS terminal interface for machine control has been redesigned and is more user-friendly. It is quick and intuitive for the user or their employees to get to grips with the machine. It is also capable of generating graphic icons related to the various functions when using the CCI A3 ISOBUS joystick.

All rotor settings can be adjusted from the control terminal without interrupting work:

• Rotor lift,
• Working and windrow width,
• Individual working width adjustment,
• Rake height,
• Machine folding, etc.

To make it even easier to control, a joystick can be connected to the terminal. Two ISOBUS solutions are available (ISOBUS terminal CCI 800 or CCI 1200). Each has an integrated colour touch screen. It is also possible to use the ISOBUS terminal already installed on the tractor or other competitor terminals. Contact your KUHN partner to find out more about equipment compatibility.
A pre-programmed sequence, integrated into the ISOBUS software, facilitates and optimises turning manoeuvres at the headland. It can be easily adapted to your needs. Thanks to the angle sensors, the rotors are always raised to the preset height, regardless of the working width. Once all the pre-sets have been made, all you have to do is press a button. Sit back and let the electronics do the work!

The working widths from 8.40 to 12.50 m and from 9.50 to 14.70 m allow for outstanding yields, which is one of the many benefits of the GA 13231 and GA 15231 rakes.
These large widths require excellent adaptability of the machine to the requirements of the crop harvesters or balers downstream of the harvesting chain. This flexibility allows you to adjust working and windrow widths continuously and hydraulically from the cab:
The position of the front rotors can be adjusted in terms of working width via hydraulic cylinders and angle sensors.
The windrow width can be changed at any time by repositioning the rear rotors. The windrow width is between 1.40 and 2.40 m (and up to 2.50 m with GA 15231).
Despite the large working widths, the four-rotor rakes are flexible enough to work in triangular-shaped fields. The ability to lift each rotor individually allows raking in the tips or avoiding obstacles. In addition, the large clearance under the rotors makes it easier to pass over windrows.
To adjust the raking height, the rotors can be adjusted simultaneously in pairs at the front or rear or individually. The height of the rotors is displayed both on the terminal screen and on the rotor frame.