GA 4121 GM / 4220 TH / 4221 GTH / 4321 GM

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Meeting the Challenge of Varying Field Conditions

Large working widths, fast working speeds and increased maneuverability allow for outstanding productivity with these single-rotor mounted and trailed rotary rakes. The working width of these models varies from 13’5” to 13’9”.

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The KUHN GA single-rotor mounted and trailed rotary rakes are designed to meet the needs of hay producers who demand higher productivity, while they increase the quality of their hay and forage crops. Large, well-formed windrows promote faster drying, enabling producers to harvest crops at their peak nutritional value with less reliance on the weather.

 

Drive components are protected from debris in the fully enclosed, heavy-duty, double reduction Masterdrive® gearbox which requires minimal maintenance. The pivoting headstock, on the GA 4121 GM and GA 4321 GM mounted models, ensures maneuverability, improved terrain following, raking quality and consistent windrow shape. While the simple clevis hitch, on the GA 4220 TH and GA 4221 GTH trailed models, allows you to quickly hookup and go. Tangential, double-curved tine arms allow these rakes to work at various speeds, while still gently raking, assuring raking quality. Since the tines do not normally contact the soil, there is less opportunity for contaminants to enter the windrow, resulting in higher forage quality.

 

Mounted Models: GA 4121 GM and GA 4321 GM. Trailed Models: GA 4220 TH and GA 4221 GTH.
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Your benefits

Proven and Durable Components to Assist You with Raking

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Masterdrive® Gearbox

The KUHN exclusive Masterdrive double-reduction gearbox is designed for all types of crops, larger rotors, and demanding conditions. The fully enclosed Masterdrive double-reduction gearbox incorporates a two-stage reduction drive for increased durability and reliability with a longer service life and lower power requirement. The large gears and gear teeth are meshed together with tight clearances to minimize wear and provide the best overall power transmission for maximum efficiency.

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.
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Maximum Operator Efficiency and Comfort

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Right-Hand Delivery

For maximum operator efficiency and comfort, right-hand delivery is ideal. All KUHN single-rotor rakes above a 13’ working width feature right-hand delivery as standard due to the double-reduction Masterdrive® gearbox. You can monitor raking quality and make adjustments at the same time with both the windrow and tractor controls conveniently located on the right side.

Narrow Transport Width

Road transport can be accomplished with complete peace of mind – simply store the tine arms in the convenient rack at the front of the machine and fold up the guards vertically. Lighting and turn signals are also standard for maximum safety. (Tine arm removal not possible on GA 4220 TH)
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Spring Design

The left guard and windrow deflector can be easily raised and lowered with the assistance of the convenient spring design.
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Swath Curtain Adjustment

A parallelogram linkage simultaneously moves the swath curtain to the rear as it is extended. This improves windrow formation and placement by ensuring the curtain is always in the proper position relative to the crop.
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Superior Ground Adaptation

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Tandem Axles

Equipped with standard tandem axles, GA trailed rotary rakes are designed to handle uneven ground. They smooth out bumps and holes keeping the distance between the ground and tines constant. The close positioning of the wheels to the tines provides smooth operation.

Prop Wheel

All mounted KUHN rotary rakes can be fitted with an additional prop wheel at the front of the rotor. This additional wheel provides improved raking performance and enhanced following of changing ground contours.
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Second Dampener

GA 4321 GM mounted models are available with an optional second dampener. This will allow these models to run more smoothly over bumpy and hilly fields.
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Specifications

 GA 4121 GMGA 4220 THGA 4221 GTHGA 4321 GM
SPECIFICATIONS
Working width - includes windrow 13'5" (4.1 m) 13'5" (4.1 m) 13'5" (4.1 m) 13'9" (4.2 m)
Clean swept width 9'2" (2.8 m) 9'2" (2.8 m) 9'2" (2.8 m) 9'7" (2.9 m)
Transport width - 11' (3.3 m) - -
Transport width with arms removed 5'8" (1.7 m) - 6'5" (2.0 m) 6'4" (2.0 m)
Lift height under tines > 24" (61 cm) 16" (41 cm) 16" (41 cm) > 24" (61 cm)
Double curved tangential mounted tine arms Standard Standard Standard Standard
Frame stabilizer Optional - - Standard
Foldable safety guards Standard - Standard Standard
Rotor diameter 10'6" (3.2 m) 10'6" (3.2 m) 10'6" (3.2 m) 11'1" (3.4 m)
Number of tines per tine arm 4 4 4 4
Number of tine arms 10 11 11 12
Fully enclosed gearbox Masterdrive GI Masterdrive GI Masterdrive GI Masterdrive GI
Removable tine arms Standard - Standard Standard
Tandem axles Optional Standard Standard Standard
Tires 16 x 6.5-8 super-balloon 18 x 8.5-8 hyper-balloon 18 x 8.5-8 hyper-balloon 16 x 6.5-8 PR super-balloon
Hydraulic lift mechanism - Standard Standard -
PTO speed 540 540 540 540
Wide angle PTO shaft - Standard Standard -
Hitch Cat. 1 and 2 Drawbar Drawbar Cat. 2
Minimum PTO power requirement 30 hp (22 kW) 30 hp (22 kW) 30 hp (22 kW) 30 hp (22 kW)
Road lights and signaling Optional Optional Optional Optional
Machine net weight approx. 1,190 lbs (540 kg) 1,290 lbs (585 kg) 1,371 lbs (622 kg) 1,547 lbs (702 kg)
Safety chain - Standard Standard -
Shipping information: gross total weight 1,436 lbs (651 kg) 1,600 lbs (726 kg) 1,675 lbs (760 kg) 1,642 lbs (745 kg)

Media

Available applications: Single-Rotor Rotary Rakes

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