GA 9531 machine silhouette

Robustness meets comfort

GA 7631, GA 8131, GA 8731 and GA 9531 twin rotor rakes deliver central swaths. Grass is raked across a width of 7.70 m to 9.30 m. They are ideal for intensive operations thanks to their MASTERDRIVE GIII gearbox.

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The GA 7631, GA 8131, GA 8731 and GA 9531 semi-mounted rakes stand out from the competing models in their robustness, reliability and ground adaption. With working widths of 7.50 to 9.30 m, the workflow will be high while keeping an excellent ground following. With the MASTERDRIVE GIII rotor drive, these rakes are well prepared for use in difficult conditions. You form uniform swaths with a structure that promotes aeration and pick-up by the following harvesting equipment.
GA 1031 at work in the field

Your benefits

Managing the heaviest forage

MASTERDRIVE GIII gearbox

MASTER DRIVE GIII gearbox: reliable and wear-resistant

Today, farm machinery must work more and more hectares and withstand ever higher forces. Machine reliability and durability are the key to meet the requirements of users in terms of work output. The MASTERDRIVE GIII gearboxes have been developed to provide full protection of the drive components and improve wear resistance. This design ensures exceptional reliability and durability even for intensive use.
It includes a double reduction system with a bevel gear and a cylindrical gear. Bevel-reduction tolerances are tightly controlled making the system extremely reliable and robust, even in difficult conditions.
Gearbox wear is greatly reduced and no maintenance is required. The double reduction system makes it possible to include larger cylindrical gears with more teeth for better power transmission.

Robust attachments

The MASTER DRIVE GIII gearbox has been designed to cope with ever increasing stress on the drive mainly due to: Increasing working widths and rotor diameters, raking heavier crops such as silage, haylage, straw and hay.
  • Important components have been strengthened to make the rotors lighter yet more robust:
  • Aluminium housings.
  • Optimised cam track to reduce forces on the roller.
  • Larger diameter roller to reduce rotation speed and pressure on the cam.
  • Tine arms with large diameter bearings.
  • Stronger pivoting-tine-arm shaft.
  • Reinforced main shaft.
  • Reinforced mounting of the tine arms on the tine holders (bolted).
  • Reinforced tine arms

    Top quality forage

    A well formed swath thanks to double-curved tine arms

    Swath formation: the benefit of double-curved arms

    The homogeneous quality and volume of the swath are conditions for fast drying and easy pick-up by the following baler.
    The tine arms on GA rakes are in hyper-tangential position. This means that they reach a 90 degree angle very late. With the tines' sharp-angled cam, tine clearance is quick, later and requires little rotational effort to produce regular, fluffy and straight swaths. Raking is of high quality even at high speeds because the forage is not pushed past the swath.
    The advantages of double-curved arms:
    • They reduce the distance between tine passes. Forage loss is reduced to a minimum, even at high speeds.
    • The main weight is at the centre of the tine arm. This increases service life as it is not subject to pressure during rotation and the guide rollers are less subject to stress.

    Protecting plant stubble

    Perfect rotor adaption to variations in the field is just as important as reduced ground pressure when it comes to protecting the ground and plant stubble.
    Single rotor rakes are fully equipped to meet these requirements.
    Each rotor is equipped with four wheels in tandem positioned extremely close to the rotor for optimised contour following on uneven plots.
    Bogie axles on GA 9531

    Passing over swaths without damaging them

    To pass over swaths without damaging them, GA 8731 and GA 9531 rakes feature a suitably high headland turn position. In addition, the rotors can be tilted individually up to 40 degrees with more than 75 cm of clearance possible if required.
    So there's no need to worry about formed swaths when you pass over them.
    More than 75 cm clearance on GA 1031

    Easy to use and adjust

    Control box: KGA 01S

    GA 7631 and GA 8131: customizable with several options

    Customize your machine with many optional equipment adapted to your farm:
    • Benefit from individual left and right rotor lift
    • Benefit from individual hydraulic setting of the rotor height
    • Choose the KGA 01S electronic control box to monitor the previous options
    • Reduce soil compaction with the large wheels.
    • Selecting the tandem axle with six wheels closest to the tines on the rear rotor will ensure optimum ground following.

    GA 8731 and GA 9531: choose the one you need

    With the KGA 02C, control the following functions:
    • Changing from work to transport position and vice versa.
    • Adjusting swath width.
    • Optional individual rotor lift to facilitate work in field points.Ê
    To adjust raking height you have a crank handle. A standard scale makes adjustment easier.
    You can also control individual rotor lift as an option.
    The KGA 11C features the following additional functions:
    • Hydraulic adjustment of working height.
    • Individual rotor lift to facilitate work in field points.
    Control boxes: KGA 02C and KGA 11C

    Safety when travelling and compactness for transport

    In transport position, the exclusive STABILIFT system of the GA 8731 and GA 9531 locks rotor movements hydraulically. The machine's stability is considerably improved during transport on roads of poor quality, but also when crossing over windrows.
    A highly useful asset: the transport height of the GA 7631, GA 8131 and GA 8731 is below 4.00 m without having to remove tine arms. As for the GA 9531, only 3 tine arms need to be removed per rotor.
    On the GA 7631 and GA 8131, three tine arms can also be removed to further lower the machine height for storage.
    STABILIFT: mechanical and hydraulic rotor locking for transport

    GA 9531 at work

    Specifications

    Technical Characteristics
     
    Working width (m)
    Average windrow width (m)
    Transport width (m)
    Transport length (m)
    Transport height with tine arms disconnected / connected
    Windrow type
    Number of rotors / Rotor diameter (m)
    Number of tine arms per rotor / Number of tines per tine arm
    Tine arms
    Gearbox
    Ground following
    Number of wheels per rotor
    Raking height adjustment
    Spare wheel for rotors
    Tyres on each rotor
    Wheels on main chassis
    Directional undercarriage wheels
    Drive to rotors
    Hitch
    Theoretical tractor power requirement (kW/hp)
    Required tractor hydraulic connections
    Required tractor electrical connections
    Road lights and signalling
    Approx. weight (kg)
    GA 8731 GA 9531
    7.70 - 8.60 8.40 - 9.30
    1.40 - 2.30 1.40 - 2.30
    2.99 2.99
    6.57 6.57
    - / 3.99 3.82 / 4.40
    1 central windrow 1 central windrow
    2 / 3.65 2 / 4.00
    13 / 4 15 / 4
    Fixed 3 removable on each rotor
    Fully enclosed double reduction MASTER DRIVE GIII Fully enclosed double reduction MASTER DRIVE GIII
    3D axle 3D axle
    4 6 (tandem included)
    By crank handle (hydraulic as option with control box KGA 11C) By crank handle (hydraulic as option with control box KGA 11C)
    As standard As standard
    16 x 6.50-8 16 x 6.50-8
    15 / 55 -17 15 / 55 -17
    As standard As standard
    Mechanical with integrated free wheel Mechanical with integrated free wheel
    2-point - Cat. 2 and 3 pivoting links 2-point - Cat. 2 and 3 pivoting links
    50 / 68 55 / 75
    1SA +1DA and 1 free return with KGA 11C box or individual rotor lift function 1147240 1SA +1DA and 1 free return with KGA 11C box or individual rotor lift function 1147240
    1 x 7-pin and 1 x 3-pin ISO sockets 1 x 7-pin and 1 x 3-pin ISO sockets
    As standard As standard
    2250 2400

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