Kuhn GA 8731+
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Heavy-Duty Components for Long Service Life
Masterdrive® GIII Gearbox
The patented KUHN Masterdrive GIII double-reduction gearbox is designed for heavy crops, tough field conditions, and intensive use. Key components have been improved to build lighter, yet stronger rotors such as: aluminum alloy housings, optimized cam track minimizing force on the follower bearing, larger follower bearing diameter reducing rotation speed and pressure on the cam, tine arms with large-dimension bearings, sturdier pivoting tine support shaft, reinforced main shaft, and reinforced mounting of tine arms on tine holders. The Masterdrive GIII’s ability to move heavy, wet crop, handle dry hay gently, and neatly windrow corn stalks is unrivaled in the industry.
Double-Curved Tine Arms
Double-curved tine arms are designed to form fluffy and straight windrows for superior raking quality at high speeds. Fluffy windrows allow more air movement through the crop promoting fast and uniform drying!
KUHN rotary rakes achieve this by following two basic principles for ideal windrow formation. First, the tine arms maintain a positive forward position right up to the point where the forage is delivered to the windrow ensuring gentle crop handling and minimal ash incorporation. Second, a steep cam track allows the tines to be raised very quickly to provide additional clearance over the windrow.
Superior Ground Adaptation & Stability
High-quality raking is only possible if the rotors are able to follow undulating terrain smoothly and closely without damaging the crop stubble. The GA 8731+ and 9531+ features 3D rotor articulation for excellent field adaptation. The rotor arm and rotor are connected by a double link rod which enables the 3D articulation, rotors follow ground contours efficiently to help you harvest a cleaner crop.
Rotor Wheels and Adjustable Tine Height
Tine height adjustments are made on each rotor with a simple hand crank. Each rotor has four total 16 X 6.50-8 super-balloon tires, two front caster wheels and two rear fixed wheels to help follow changing ground contours to avoid tines from striking the ground.
Both rotors can be quickly lifted with a single-acting hydraulic valve for lifting over obstacles and automatically locking the rotor lift during turns at field headlands to eliminate rotor swinging.
|Working width - includes windrow||25'3" - 28'2" (7.7 - 8.6 m)|
|Swath type - working width including windrow||Center delivery (1 windrow)|
|Clean swept width||21'4'' (6.5 m)|
|Windrow width||4'6" - 7'5" (1.4 - 2.3 m)|
|Transport width||9'9" (2.99 m)|
|Length||21'6" (6.57 m)|
|Transport height||13' (3.99 m) tine arms not removable|
|Double curved tangential mounted tine arms||Standard|
|Foldable safety guards||Standard|
|Number of rotors||2|
|Vertical hydraulic folding rotors||Standard|
|Rotor diameter||12' (3.7 m)|
|Number of tines per tine arm||4|
|Number of tine arms||13|
|Center swath curtain||Optional|
|Fully enclosed gearbox||Masterdrive GIII|
|Removable tine arms||Fixed|
|Working height adjustment||By crank handle (hydraulic as option)|
|Rotor flotation||3-D terrain following|
|Spare rotor wheel||Standard|
|Rear wheel steering||Standard|
|Tires on each rotor||4-16 x 6.50-8|
|PTO speed||540 rpm|
|Overrunning clutch on PTO||Standard|
|Hitch||2-point - Cat. 2 and 3N pivoting links|
|Minimum PTO power requirement||68 hp (50 kW)|
|Required tractor hydraulic connections||1 SA +1 DA (+ 1 DA if hydraulic raking height adjustment)|
|Control box||Standard KGA 04 C|
|Road lights and signaling||Standard|
|Machine net weight approx.||4,960 lbs (2,250 kg)|