Kuhn GA 8731+

HEAVY-DUTY COMPONENTS

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 crop, handle dry hay gently, and create a uniform windrow 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 higher 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

Superior Ground Adaptation & Stability

3D Suspension
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 8131, 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 on the GA 8131 comes standard with a set of front fixed wheels with two fixed axles at the back. The GA 8731+ features a set of front caster wheels with two fixed axles at the back of the rotor to help follow changing ground contours to avoid tines from striking the ground. The GA 9531+ comes standard with a set of front caster wheels and a set of tandem axles in the rear, ideal for traveling over pivot tracks.

Rotor Lift
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.

EASY ADJUSTMENTS

Easily Make Adjustments for Your Rake

Adjustable Working Width
Easily adjust the working width hydraulically from the seat of the tractor.​ The working width can be adjusted from 23’4” to 26’3” (7.1 – 8.0 m) on the GA 8131, 25’3” to 28’2” (7.7 – 8.6 m) on the GA 8731+ and an adjustable working width from 27’6’’ to 30’6’’ (8.4 – 9.3 m) on the GA 9531+.

Control Box
On the GA 8731+ and 9531+, the KGA 04C control box comes standard. The control box manages all the functions such as rotor working height adjustment, individual rotor lift (if machine is equipped with these options), rotor lift at headlands, working and windrow width adjustments. Simplified folding and unfolding between transportation and field working positions is also controlled from the control box for operator convenience. The KGA 01S control box is optional on the GA 8131.