GA 4431 machine silhouette

Everything a large model has

GA 4431, GA 4731 and GA 5031 are mounted single rotor rakes. They rake at a working width of 4.40 to 5.00 m. With the MASTERDRIVE GIII gearbox they are just as reliable as the larger models. Their arm holders make tine removal very easy.

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Choose these mounted single-rotor rakes for their reliability equivalent to our large-width rakes with twin or 4 rotors. They have the same MASTER DRIVE GIII gearbox adapted to the most intensive uses!
With working widths from 4.40 to 5.00 m, they also have ergonomic advantages, especially in terms of arm removal and machine folding for transport.
Ga 4431 at work in the field

Your benefits

As reliable as a large model

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

    GA 5031: for the big jobs

    The GA 5031 is the biggest single rotor rake on the market.
    With a 4 m diameter rotor for 5 metres of working width you can rake faster than with any other single rotor machine in the world!
    GA 5031: the largest single rotor rake on the market

    Easy and ergonomical folding and adjustments

    GA 4731: place arms in their ergonomic storage areas effortlessly

    Changing plot is easy

    These rakes were designed with new, more ergonomic arm holders and centralised locking. Remove arms and place them in the storage area effortlessly. The rotor can be turned to make each tine arm easy to access. It is very easy to change plots with the GA 1031 single rotor rake series. Practical when your fields are divided by roads.

    A crank handle to set raking height

    Raking height is easy to adjust via a crank handle.
    Raking height adjustment

    Swath curtain and guards deployed simply

    The swath curtain and guards can be deployed hydraulically (optional equipment) or manually, very easily thanks to a weight compensation spring.
    Easy deployment of swath curtain

    Smooth driving

    Benefit from the stability of a single rotor on hilly and sloping ground. The mounted version has two side dampers with excellent machine-recentering capabilities. The headstock with 48° turning radius and bogie axle as standard, make this machine ideal in terms of manoeuvrability.
    Side dampers on mounted GA 1031

    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.
    4 wheels in tandem, extremely close to the rotor for ground following

    Make swaths, don't break them!

    The lift system allows you to reach a swath bypass height which is over 40 cm for mounted models.
    Swath clearance on GA 5031

    GA 5031 at work

    Specifications

    Technical Characteristics
     
    Working width (m)
    Average windrow width (m)
    Windrow curtain
    Transport width with arms disconnected/connected (m)
    Guard unfolding and folding
    Control of the windrow curtain
    Number of rotors / Rotor diameter (m)
    Number of tine arms per rotor / Number of tines per tine arm
    Tine arms
    Gearbox
    Bogie axles
    Wheel type
    Raking height adjustment
    Tyres on each rotor
    Drive to rotors
    Hitch
    Headstock
    Headstock stabilisers
    Theoretical tractor power requirement (kW/hp)
    Required tractor hydraulic connections
    Road lights and signalling
    Approx. weight (kg)
    GA 4431 GA 4731
    4.40 4.65
    0.70 - 1.50 0.70 - 1.50
    Windrow curtain Windrow curtain
    2.25 / 3.75 2.45 / 4.00
    Manual as standard - Hydraulic as optional equipment Manual as standard - Hydraulic as optional equipment
    Manual as standard - Hydraulic as optional equipment Manual as standard - Hydraulic as optional equipment
    1 / 3.40 1 / 3.65
    12 / 4 13 / 4
    Removable Removable
    Fully enclosed double reduction MASTER DRIVE GIII Fully enclosed double reduction MASTER DRIVE GIII
    As standard As standard
    Fixed Fixed
    By crank handle By crank handle
    16 x 6.50 - 8 16 x 6.50 - 8
    Mechanical with integrated free wheel Mechanical with integrated free wheel
    3-point Cat. 2 3-point Cat. 2
    Pivoting Pivoting
    As standard As standard
    23 / 30 26 / 35
    - -
    As optional equipment As optional equipment
    724 750

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