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Kuhn - GA 8731+ & 9531+

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Kuhn GA 8731+ & 9531+ Create the Perfect Windrow!

The GA 8731+ and 9531+ central-delivery rakes, with fast forward speeds and excellent raking cleanliness, create the ideal windrow for making round or large square bales. Working Widths: 25’3” to 30’6”.

The redefined KUHN GA 8731+ and GA 9531+ center-delivery twin-rotor rotary rakes are built on the popularity of the prior generation of KUHN’s twin-rotor rakes with the incorporation of the Masterdrive® GIII double-reduction gearbox. The main gearbox features the KUHN exclusive double reduction drive that not only provides consistent windrow formation in varying crop conditions, but also improves the power flow through the gearbox. These models have a lighter, but stronger construction with aluminum rake arm housings, large cam bearings and cam track designed to reduce peak loads. They maintain the KUHN double-bend tine arm design that offers clean raking and excellent capacity for consistent, fluffy windrows. The GA 8731+ has fixed tine arms. For operations where transport height is a concern, the GA 9531+ has easily removable tine arms.

GA 8731+ & 9531+
Sale Type
  GA 8731+ GA 9531+
Working width - includes windrow 25'3" - 28'2" (7.7 - 8.6 m) 27'6" - 30'6" (8.4 - 9.3 m)
Swath type - working width including windrow Center delivery (1 windrow) Center delivery (1 windrow)
Clean swept width 21'4'' (6.5 m) 23'6'' (7.2 m)
Windrow width 4'6" - 7'5" (1.4 - 2.3 m) 4'6" - 7'5" (1.4 - 2.3 m)
Transport width 9'9" (2.99 m) 9'9" (2.99 m)
Length 21'6" (6.57 m) 21'6" (6.57 m)
Transport height 13' (3.99 m) tine arms not removable 14'3" (4.40 m) or 12'4" (3.82 m) with tine arms removed
Double curved tangential mounted tine arms Standard Standard
Foldable safety guards Standard Standard
Number of rotors 2 2
Vertical hydraulic folding rotors Standard Standard
Rotor diameter 12' (3.7 m) 13'1" (4.0 m)
Number of tines per tine arm 4 4
Number of tine arms 13 15
Center swath curtain Optional Optional
Fully enclosed gearbox Masterdrive GIII Masterdrive GIII
Removable tine arms Fixed Standard
Working height adjustment By crank handle (hydraulic as option) By crank handle (hydraulic as option)
Rotor flotation 3-D terrain following 3-D terrain following
Spare rotor wheel Standard Standard
Transport tires 15/55-17 15/55-17
Rear wheel steering Standard Standard
Tires on each rotor 4-16 x 6.50-8 6-16 x 6.50-8
PTO speed 540 rpm 540 rpm
Overrunning clutch on PTO Standard Standard
Hitch 2-point - Cat. 2 and 3N pivoting links 2-point - Cat. 2 and 3N pivoting links
Minimum PTO power requirement 68 hp (50 kW) 75 hp (55 kW)
Required tractor hydraulic connections 1 SA +1 DA (+ 1 DA if hydraulic raking height adjustment) 1 SA +1 DA (+ 1 DA if hydraulic raking height adjustment)
Control box Standard KGA 04 C Standard KGA 04 C
Road lights and signaling Standard Standard
Machine net weight approx. 4,960 lbs (2,250 kg) 5,290 lbs (2,400 kg)
Check chain Standard Standard
your benefits

Heavy-Duty Components for Long Service Life

Kuhn GA 8731+ & 9531+ 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.

Kuhn GA 8731+ & 9531+ 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

Kuhn GA 8731+ & 9531+ 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 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.​

Kuhn GA 8731+ & 9531+ 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.

Kuhn GA 8731+ & 9531+ 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.



Ross Doble inc. is located in the Heart of Central Ontario.  We are a large modern dealer facility that sells Kubota, Kuhn, Krause, Hardi and Land Pride, as well as a large amount of short lines to ease your day to day rural living.  Family owned for over 70 years.  We see all makes, models and sizes - from combines to lawnmowers thru our Service doors because of our experience and low door rate. 
Sales staff listens, evaluates and recommends what fits your needs best with no pressure tactics.  Our Parts staff have over 40 years experience, they know the new and old.  The Office Manager will be more than happy to open an account for you, accepting Visa, Mastercard Credit Cards.  We are your dealer.





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