Four-rotor rakes GA 10231

Two four-rotor rakes with 100% hydraulic drive

The four-rotor rakes GA 13231 and GA 15231 work from 8.40 m to 12.50 m and from 9.50 to 14.70 m respectively. Their 100% hydraulic drive saves you one hour of maintenance per day.

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Benefits
Specifications
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The four-rotor rakes GA 13231 and GA 15231 work from 8.40 m to 12.50 m and from 9.50 to 14.70 m respectively. Their 100% hydraulic drive saves you one hour of maintenance per day. They feature numerous developments, both in terms of raking quality, ease of use and machine life.
These rakes offer high productivity thanks to their very wide working width. The presence of a single greaseable transmission saves you up to one hour of maintenance per day, compared to a mechanically driven rake of equivalent size. This time saving allows you to increase your yield by windrowing up to ten more hectares per day.

Less maintenance

The 100% hydraulic rotor drive is exclusive to KUHN

Exclusive: 4 rotors 100% hydraulic

One hour less maintenance, one hour more windrowing! The rotors are driven hydraulically by hydraulic pumps driven by a single transmission to minimise maintenance. Forget about the daily greasing of secondary transmissions. You save up to one hour compared to a mechanically driven rake of the same size. This can make a difference when rain is threatening and the crop has to be brought in quickly. This reduces the need for maintenance. Other benefits include smooth, quiet operation and minimal wear and tear. The hydraulic unit of the GA 13231 and GA 15231 rakes is positioned on the swivelling headstock of the machine frame. This ensures that the primary transmission is always perfectly aligned with the tractor, even in tight turns. In addition, the PTO speed can be modified from the cab for perfect adaptation to the type and volume of crop. You can choose between two rotation frequencies: 1,000 or 750 rpm to save fuel.

MASTERDRIVE GIII housing: reliable and wear-resistant

With a new hydraulic drive and an even more powerful MASTERDRIVE GIII housing, your machine can cope with high volumes of crop and difficult conditions. The transmission is made by spur gears. Tolerances are therefore tightly controlled for a more reliable and robust assembly.

The MASTERDRIVE GIII housing can cope with intensive conditions

Crop quality first

The speed of the front rotors is increased by 20% thanks to the BOOST function

A boost for well-shaped windrows

A regular windrow is especially pleasant for drivers of the following harvesting machines. It is most easily collected by pick-ups of crop harvesters, self-loading trailers and balers. Smooth driving means greater comfort! The speed of the front rotors can be increased by 20% compared to the rear rotors. All this without having to move from the tractor cab. The boost function ensures that the crop is moved more towards the centre of the machine. It is less twisted, as it does not roll on the ground. This allows the rear rotors to form a uniform and airy swath. It is an ideal solution for perfect crop drying.

Windrow formation: a plus thanks to the double-curved arms

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:

They reduce the distance between the tine passes. Forage loss is kept to a minimum even at high ground speeds.
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.

The rotors adapt perfectly to the variations in the terrain to protect the plant cover

Preserve the plant cover

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.

Quick to get started

Even more peace of mind with Section Control

Take advantage of the Section Control feature to automate rotor lifting and lowering at the headlands. In the most difficult plots or at headlands, the driver can focus solely on driving; a real comfort and a veritable gain in productivity!

A new, more user-friendly terminal interface

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.

The rake is easy to operate with the CCI 1200 ISOBUS terminal and the CCI A3 joystick

All settings are in the cab thanks to ISOBUS

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!

All settings can be made from the cab using the CCI 1200 ISOBUS terminal.

Adapt the windrow to the volume of crop and the width of the pick-up

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.

Windrow width is easily adjusted with the GA 13231 and GA 15231 rakes

Specifications

Technical characteristics


Working width (m)
Average windrow width (m)
Transport width (m)
Transport length (m)
Transport height (m)
Windrow type
Number of rotors / Rotor diameter (m)
Number of tine arms per rotor / Number of tines per tine arm
Tine arms
Gearbox
Ground following
Number of wheels per rotor
Raking height adjustment
Front rotor suspension
Front rotor individual working width adjustment
Spare wheel for rotors
Control terminal
Drive to rotors
PTO shaft
Hitch
Theoretical tractor power requirement (kW/hp)
Required tractor hydraulic connections
Required tractor electrical connections
Road lights and signalling
Approx. weight (kg)
Basic machine delivered assembled (except optional equipment)

GA 13231	GA 15231
8.40 - 12.50	9.50 - 14.70
1.40 - 2.40	1.40 - 2.50
3.00	3.00
9.95	10.90
3.95	4.00
1 central windrow	1 central windrow
4 / 3.20	4 / 3.65
11 front - 12 rear / 4	13 front - 15 rear / 4
Fixed	Fixed
Fully enclosed double reduction MASTER DRIVE GIII	Fully enclosed double reduction MASTER DRIVE GIII
3D axle	3D axle
4 - Pivoting	4 - Pivoting
Hydraulic via the control box	Hydraulic via the control box
Constant hydraulic suspension, automatically adjusted according to the working width	Constant hydraulic suspension, automatically adjusted according to the working width
As standard	As standard
2 as standard	2 as standard
ISOBUS machine: use of a CCI terminal or a tractor ISOBUS terminal	ISOBUS machine: use of a CCI terminal or a tractor ISOBUS terminal
Integrated hydraulic system mounted in the headstock	Integrated hydraulic system mounted in the headstock
Always in line with the tractor	Always in line with the tractor
2-point - Cat. 2 and 3 pivoting links	2-point - Cat. 2 and 3 pivoting links
70 / 95	85 / 115
LS connection: 1 x Pressure, 1 x Free return, 1 x load sensing	LS connection: 1 x Pressure, 1 x Return free, 1 x load sensing
1 x 7-pin socket (signalling)	1 x 7-pin socket (signalling)
As standard	As standard
5150	6100
Yes	Yes