GA 10031 quad-rotor rake

GA 13031 machine silhouette

Appreciate its simplicity!

GA 13031 quad-rotor rake delivers central swaths. It works between 8.40 m and 12.50 m and features a 100% hydraulic drive system which saves one hour of maintenance per day.

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Simplicity and work output are the key points of the GA 13031. With an adjustable working width between 8.40 and 12.50 m, it is the perfect ally for a high work output. 100% hydraulic drive and MASTERDRIVE GIII rotors ensure the machine's longevity in heavy and dense forage year after year. The 3D articulation of the rotors, the wheels closest to the tines, the hypertangential arms, the lowering with "jet effect" are all assets for excellent ground following, limiting the incorporation of impurities and forming homogeneous and calibrated windrows.
GA 10031 at work

Your benefits

Maintenance savings

100% hydraulic rotor drive with a single pto-shaft saves maintenance time

Fully hydraulic drive

The hydraulic rotor drive only features a single pto shaft for reduced maintenance. Forget daily lubrication of secondary pto-shafts. You will save up to one hour with regards to a gyrorake with mechanical drive of equivalent size. An asset that makes the difference when rain is looming and forage must be collected quickly.

MASTERDRIVE GIII gearbox: reliable and wear-resistant

These rakes are equipped with MASTERDRIVE rotors which is well known for its reliable design and exceptional longevity, even when used intensively.
It includes ahigher performance MASTERDRIVE GIII double reduction gearbox system with a bevel gear and a cylindrical gear. Bevel reduction tolerances are tightly controlled making the system extremely reliable and robust, even in difficult conditions.
Gearbox wear is greatly reduced and no maintenance is required. The double reduction gearbox system makes it possible to include larger cylindrical gears with more teeth for better power transmission. these 4 rotor rakes are ready to work high volumes of forage in difficult conditions.

Top quality forage

A well formed swath thanks to double-curved tine arms

Optimum swath formation with double-curved tine arms

The homogeneous quality and the volume of swaths are necessairy for faster drying and easy pick-up by balers.
The tine arms on GA rakes are in a hyper-tangential position. This means that they reach a 90° angle very late. With the tines' sharp-angled cam, tine clearance is quick, later and requires little rotational effort to produce regular, fluffy and straight swaths. Raking is of high quality even at fast speeds because the forage is not pushed past the swath.
The advantages of double-curved arms:
  • They reduce the distance between tine passes. Forage loss is reduced, even at higher speeds
  • The main weight is at the centre of the tine arm. This increases service life as it is not subject to pressure during rotation and the guide rollers are less subjected to stress.

Protecting plant stubble

Perfect rotor adaption to variations in the field is just as important as reduced ground pressure when it comes to protecting the ground and plant stubble.
KUHN four rotor rakes are fully equipped to meet these requirements:
  • The rotors are suspended at the junction of a pivot point and independent from the main frame so they can pivot in every direction. 3D pendulum-type rotors follow uneven ground with precision, to perfection. Result: an impeccable performance with the guarantee of clean forage and healthy ground cover.
  • Wide tyres help reduce ground compaction and ensure rotor stability, even on slopes.
  • Each rotor is equipped with four pivoting wheels so the sward is protected, even during tight turns. Being positioned close to the tines, the rotors adapt immediately and efficiently to field variations.
  • The front rotor arms are equipped with springs so the rotors skate across the ground putting less pressure on it. Hydraulic suspension on the rear rotors is available as an option to transfer the weight onto the machine frame and increase stability on steep slopes.
  • A hydraulic cylinder at the front of the rotor head controls lowering. Just like a plane, the rear touches down before the front, therefore the tines do not come into contact with the ground due to this "jet" effect.
3 D pendulum-type rotor suspension

Easy handling

Adaption of GA 13131 working width to forage volume

Adapt the swath to the volume of forage and width

8.40 to 12.50 m working widths enable the outstanding work output that characterises GA 13131 gyrorakes. These large widths require excellent machine adaptability to balers and loader wagons.
  • Concerning the working width, the front rotor position can be adjusted using the hydraulic outlets.
  • Windrow width can be changed at any time by repositioning the rear rotors. Windrow width is between 1.40 and 2.40 m.
  • Despite their wide working widths, gyrorakes with four rotors are flexible enough to work in triangular-shaped plots. As each rotor can be lifted individually, field points can be raked and obstacles avoided. Furthermore, high under-rotor clearance facilitates windrow bypass.

Simple machine monitoring

Drive the machine easily with the hydraulic valves. The folding/unfolding movements, working width, windrow width are carried out very simply with the use of 3 hydraulic valves: 2 double acting and 1 single acting with free return. Enjoy the simplicity of the machine's adjustment. A crank on each rotor allows working height to be adjusted individually. The optional KGA 03C electric control box will allow you to control the individual right/left front rotor lift. It also allows the work/transport position to be activated and the activation of the lift or floating position of the rear rotors.
The GA 13031 remains easy to use: individual work height adjustment by crank

More stability on slopes and on the road

The linkage system with integrated suspension makes driving smoother and improves stability between the tractor and the rake when turning. Badly-maintained roads are no longer a problem. You'll appreciate the machine's capacity on bends and its individual rotor lift with no jolting on the lift arms.
Despite their impressive size, these four rotor rakes are relatively compact in transport mode and easy to move around:
  • In transport position the machines are less than 4.00 m in height, without having to remove the tine arms.
  • Their low centre of gravity ensures stability on the road.
  • With pneumatic brakes, GA 13131 and GA 15131 rakes are authorised to drive at 50 km/h (subject to homologation pet country).
The linkage system with suspension


GA gyrorake at work on a meadow


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
Ground following
Number of wheels per rotor
Raking height adjustment
Front rotor suspension
Spare wheel for rotors
Control terminal
Drive to rotors
PTO shaft
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 13031
8.40 - 12.50
1.40 - 2.40
1 central windrow
4 / 3.20
11 front - 12 rear / 4
Fully enclosed double reduction MASTER DRIVE GIII
3D axle
4 - Pivoting
By crank handle
By spring
2 as standard
By hydraulic valves, separate front rotor lift as option (control box KGA 03C included)
By hydraulic unit fitted on the headstock
Always in line with the tractor
2-point - Cat. 2 and 3 pivoting links
70 / 95
1 SA with floating position + 1 free return + 2 DA
1 x 7-pin socket (signalling)
As standard