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Mowers combinations

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GMD 1030 and GMD 1030+ triple disc mowers

Maximum output, optimal forage quality

Available in three working widths (from 8.30 m to 9.93 m), this range provides maximum work output without compromising forage quality. It is designed for large farms, contractors and machinery cooperatives.

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Top-quality forage is priority, in spite of increasingly large areas to mow and limited mowing periods. To meet these challenges, GMD triple gang mowers are made to be reliable, efficient and produce high-quality output, so that you can reach your productivity objectives without compromising forage quality. They come in three versions, for tractors from 120 hp, making it possible to harvest clean, high-quality forage. You can attach a GMD 3125 F or a GMD 3525 F at the front of the tractor to create a combination capable of increasing productivity to its maximum.

* GMD 3125 F is not compatible with GMD 10030+.
Aerial view of the GMD 1030 triple mower at work

Your benefits

Maximum work output, optimal forage quality

The key to clean forage: LIFT-CONTROL hydro-pneumatic suspension

Lowering the level of impurities from 4 to 2 % per year, means gaining 89€/ha/year*. With the LIFT-CONTROL hydro-pneumatic suspension system, controlling the impurities is no longer a problem. It is far more than a suspension system, using an accumulator instead of the traditional spring.
The exclusive kinematics of the triple gang mowers in this range include a cylinder for the suspension of the mowing unit (1), a safety release cylinder (2), an accumulator with adjustable pressure (3) and a pivot point strategically positioned close to the machine's centre of gravity (4).
The adjustment adapted by the suspension system limits the introduction of impurities in the forage and reduces the ground pressure of the cutter bar, therefore a reduction of the fuel consumption and skid wear, and the sward is preserved.
*Researchers from the Chamber of Agriculture of Weser Ems (Germany) have carried out a study in a german forage producing region. They compared 2 silages, one with a level of impurities of 2 % and the other with 4 % in order to determine the financial impact on a dairy farm. After having measured the nutritional value of the silage of poorer quality, they calculated the value of concentrates that needed to be added in order to reach the same level of milk production.

OPTIDISC ELITE: the unrivalled cutter bar

The new OPTIDISC ELITE cutter bar was developed with farmers. Variable spacing between the discs, large overlap zones and the reduced angle of the OPTIDISC cutter bar will provide you with the quality you need. GMD 1030 TRIPLES are equipped with this cutter bar and its latest upgrades that guarantee a clean cut at all times. The OPTIDISC ELITE cutter bar includes exclusive features:
  • Spacing is reduced at the point where the discs diverge to increase knife overlap. This results in a clean cut, even in light or short grasses. (A)
  • Distance is increased at the point where the discs converge. This makes more space for the crop to pass through which is quickly carried away to the rear so that the mower can do its job undisrupted. (B)
  • The overlap zone is almost doubled resulting in better cutting quality in damp sticky ground (or with mole hills), in heavy and laying crops, and in plant cover harvested at the end of autumn
  • A smaller pitch angle: this prevents the undulating cut which is typical with close mowing. It also stimulates homogeneous and faster regrowth and makes it easier to adjust the machines that follow.
  • New disc bearings with exclusive shape and attachment which hold the knives firmly in place in the event of impact while granting 360° rotational freedom.
Earth can build up in front of a cutter bar on hilly plots or in wet and sticky conditions, but not with the OPTIDISC ELITE cutter bar! It has specially designed skids to improve sliding and preserve the sward. Another advantage for forage quality, especially in difficult conditions.

Ground following with the travel range of the rear units

The rear units on GMD triple gang mowers follow practically all ground contours thanks to:
  • Units with pendulum-type articulation,
  • Hydraulic side offset, 20 cm each side, (fixed position on GMD 8730)
  • Almost 50 cm of vertical offset,
  • Angular range of approximately 20° with an overlap of 50 cm.
These impressive numbers demonstrate that KUHN has done everything possible to improve the quality of your forage!
Impeccable mowing quality with the GMD 9530

Practical and money-saving

Combined LIFT CONTROL and NON-STOP safety

Who can afford to damage their mower on an obstacle or due to a driving error in the middle of the season?
If a mowing unit hits an obstacle, it pivots backwards around an axis. At the same time, oil is sent to the LIFT-CONTROL cylinder for the suspension system. The pressure increase facilitates mower lift in order to clear the obstacle. The mowing unit automatically returns to its initial position without stopping.
  • The safety system works well even if the inner discs hit an obstacle, thanks to the arm's pivot point being far enough away from the first discs (A).
  • Each mowing unit has an independent suspension system which prevents either one from moving forward while the other is clearing an obstacle.
  • The hydraulic safety-release system can be adjusted to suit mowing conditions. Two positions (arrows) are available for the cylinder: the second position increases the release threshold of the safety system which is useful when working at high speeds or in particularly difficult conditions.

Maximum reliability and stability

The cutter bar has been designed to cope well with obstacles. Being equipped with the PROTECTADRIVE safety system, in the event of a violent impact between a disc and an obstacle, the shaft holding the disc can shear just above the bearing thanks to a carefully dimensioned shear groove. Therefore the gear wheels are protected. In less than 15 minutes, the machine can back up and running with a low repair cost.
KUHN advantage: Disc-bearing stations are attached by long bolts that pass through the entire cutter bar. This eliminates any risk of the mounts being torn out of the cutter bar in the event of an impact. Top-of-the-range components strengthen the centre piece of the cutter bar:
  • Special disc-bearing station with a double row of angular contact ball bearings.
  • Large-diameter gearwheels in high-precision forged steel with 3 cogs engaged.
  • Forged and heat-treated discs.
  • Disc skids made from treated steel with the option of adding a bolt on protective layer.
In order to lengthen the machine's service life, shock absorbers are integrated in between the cutter bar and chassis. The structure of the machine is less affected by impacts, especially when working at fast forward speeds.

Minimum maintenance

You will waste no time on maintenance.
The OPTIDISC cutter bar is an excellent example of added value created through the close collaboration between manufacturer and farmer. It is a solution that is totally adapted to operations and will save you time:
  • Lubricated for life. No need to service the cutter bar.
  • FAST-FIT quick-release knife system, 100 % secure. A powerful leaf spring provides constant pressure on the knife retainer for extra safety. It takes just a few moments to replace the knives.
Maintenance is kept down, and is occassionally necessary for the drive system and the pivot points.

FLEXPROTECT guard: save on repair costs

To avoid damage during mowing, around the edge of the fields or along trees, the outer FLEXPROTECT guard bends and then returns to its initial shape. This design avoids additional repair costs. Unfolding of the guards is controlled hydraulically.

Just the right width, no more, no less

GMD 9530 triple mower in action

Adequate overlap to adapt to plots

For a thorough clean cut on slopes and during tight turns, the mowing units can be offset sideways by 20 cm to increase the overlap between the front and rear units.
According to the combination model, overlaps vary from 30 cm to 70 cm.
The driver can modify the working width from the tractor cab. This feature is a real asset for tractors with larger wheels (GMD 9530 -10030).
The possibility of individual lift of the two rear units is a significant advantage when mowing triangular-shaped plots. Manoeuvres are easier and faster to perform. The mowing unit is put into transport position via a double acting valve.
On the GMD 8730, you can chose between three assembly positions (1, 2, 3) of the mowing units on the legs according to the working conditions (slopes, plot size, width of the front unit...). This way, it is possible to adapt the working width or a significant overlap between the front and rear units.

Large working width, compact storage

The GMD 1030 triple gang mower is very compact when folded. It can be stored vertically without any additional equipment, so easily fits into most sheds.
GMD 1030 triple in storage position

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Equipment

Disc skid for a high cut

Special skids can be fitted on the machine to obtain a cutting height between 45 and 85 mm.
    Rear view of the GMD 9530 mower

    Media

    GMD 9530 with GMD 3525 at work
    GMD 10030 at work in the field

    GMD 1030/1030+ in action

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