LEXION 670-620

The LEXION with APS threshing system and effective straw walker technology.

More powerful, more productive, more flexible, more comfortable, more profitable: harvest more.

LEXION 670-620

The LEXION with APS threshing system and effective straw walker technology.

More powerful, more productive, more flexible, more comfortable, more profitable: harvest more.

Crop flow. Gold for CEMOS AUTO THRESHING.

Gold for CEMOS AUTO THRESHING - the autonomous threshing system for CLAAS straw-walker and hybrid combine harvesters

CEMOS AUTO THRESHING represents a further step towards the automation of combine harvesting. This new assistance system performs fully automatic adjustment of the threshing concave gap and the threshing drum speed of tangential threshing systems, adapting dynamically to the prevailing threshing conditions. In this way, the threshing process performed by the threshing system undergoes continuous and automatic optimisation right up to the limits of what is technically possible. No lengthy preselection of settings is necessary. However, the combine harvester operator can intervene at any time if he or she wishes to.

Beneath the CEMOS AUTOMATIC umbrella, CEMOS AUTO THRESHING is networked with all the other assistance systems of the combine harvester, especially with CRUISE PILOT, the automatic ground-speed control system. Interaction of the assistance systems is monitored and controlled by means of a central module. Taking as its starting point the basic setting for the crop in question, AUTO THRESHING is therefore always able to find the optimal set-up for the threshing unit, which allows it to thresh as gently as possible and as aggressively as necessary. It does this in coordination with the residual grain separation, the cleaning and the ground speed. This arrangement has the added benefit that the work of these downstream automated systems is made easier.


  • Automatic threshing, separation and cleaning.

    CEMOS AUTO THRESHING finds the best setting for:

    • Threshing drum speed
    • Threshing concave gap

    CEMOS AUTO CLEANING optimises the cleaning process by adjusting the following:

    • Fan speed
    • Upper sieve opening
    • Lower sieve opening

    CEMOS AUTO SEPARATION acts on the ROTO PLUS residual grain separation system and adjusts the following:

    • Rotor speed
    • Rotor flap position
  • Functional principle.

    Simple, but remarkably effective: when the combine harvester starts work in the field, AUTO THRESHING, AUTO CLEANING and AUTO SEPARATION configure the machine to comply with certain preset values, quickly establishing the optimal setting for the working systems. This optimum configuration is repeatedly checked and continuously adjusted, taking account of the changing harvesting conditions throughout the course of the day. In this way, AUTO THRESHING, AUTO CLEANING and AUTO SEPARATION carry out continuous readjustment on a scale which no operator would be able to achieve manually.

  • Four optimisation strategies.

    The operator has a choice of four optimisation strategies:

    • Improve grain quality
    • Improve threshing
    • Improve grain cleaning
    • Improve straw quality

    The selection made by the operator specifies the result which AUTO THRESHING, AUTO CLEANING and AUTO SEPARATION are to attain in accordance with the required strategy. In order to do this optimally, AUTO THRESHING controls the threshing system automatically, AUTO CLEANING the cleaning, and AUTO SEPARATION the residual grain separation.

  • The operator has full control all the time.

    CEMOS AUTO THRESHING, CEMOS AUTO CLEANING and CEMOS AUTO SEPARATION operate systematically on the basis of the CEMOS DIALOG software. The operator can intervene at any time and use the dialogue with CEMOS to establish the correct setting. The automatic systems remain active when this happens. On the basis of the current situation, CEMOS DIALOG provides the operator with further instructions for machine optimisation.

    Of course, it is still possible to carry out continuous manual adjustment of the threshing system, residual grain separation and cleaning in CEBIS. The automatic functionality is shut down temporarily to allow this.

    Operating the AUTO PILOT button on the multifunction control lever / CMOTION once again reactivates AUTO THRESHING, AUTO CLEANING and AUTO SEPARATION.

    Furthermore, it is possible to fully enable or disable the automatic function. It is also possible to activate or deactivate CEMOS AUTO THRESHING, CEMOS AUTO CLEANING and CEMOS AUTO SEPARATION independently of each other.

  • Display and operation.

    ALL CEMOS AUTOMATIC functions are controlled and monitored via the CEBIS MOBILE terminal. The CEBIS MOBILE terminal provides the operator with a permanent overview of all the functional units of the machine and their settings. The machine's CEBIS terminal can only be used to control the units; it does not provide an overview of them.

  • Fully automatic grain cleaning.

    The GRAIN QUALITY CAMERA operates in conjunction with CEMOS AUTO CLEANING and CEMOS AUTO SEPARATION to provide automatic control. The live image from the GRAIN QUALITY CAMERA can be displayed in CEBIS MOBILE. Touching the image opens a dialogue window for adjusting the sensitivity. In this way, the operator can set the required level of grain cleaning. CEMOS AUTO CLEANING and CEMOS AUTO SEPARATION now optimise the cleaning and residual grain separation continuously if the desired level has not yet been attained. The GRAIN QUALITY CAMERA, which is available to support this process, can be switched on and off in CEBIS.

    How it works:

    The evaluation by the GRAIN QUALITY CAMERA shows the proportion of broken grains as well as the proportion of non-grain constituents (NGC). This information is shown on the CEBIS screen in graphical form, either directly in the live image or in the harvest display. The operator can set the required level of grain cleaning by adjusting the sensitivity.

The new CEBIS MOBILE. Redefining ease of handling.

With its 12" touch-sensitive screen, the new CEBIS MOBILE offers entirely new possibilities for controlling the CRUISE PILOT, CEMOS DIALOG and CEMOS AUTOMATIC operator assistance systems. All operating status indicators appear within the machine silhouette.

CEBIS MOBILE keeps you in the picture.

The current conditions of all major assemblies and active CEMOS AUTOMATIC functions are shown. In addition, the status of the 4D-cleaning system is indicated. The image from the GRAIN QUALITY CAMERA can also be shown. In this way, the operator can keep an eye on all the relevant information and adapt the operating strategy if necessary.

CEMOS DIALOG has the right setting.

CEMOS DIALOG fulfils the wish for an assistant capable of finding the right combine settings every time, balancing performance, quality, safety and efficiency. The specified values from CLAAS in the crop log are a good average value for nearly all harvesting conditions, but there is usually room for optimisation. CEMOS helps to utilise this potential consistently.

NEW: CEMOS DIALOG with new operating concept.

CEMOS DIALOG operation and display functions are controlled through the new CEBIS MOBILE. The main display area shows the current status of all the main components.

  • A working dialogue.

    CEMOS DIALOG guides the operator to the best setting using a screen dialogue.

    The optimisation occurs in three steps:

    1. The operator requests a suggestion for a setting (for example, to reduce losses)
    2. CEMOS DIALOG makes a logical setting suggestion
    3. The operator accepts this setting suggestion or rejects it

    Steps 2 and 3 are repeated until the operator is satisfied with the result or CEMOS DIALOG has no further suggestions. Equipment adjustments (such as fan speed) are performed by CEMOS DIALOG whenever possible but must always be confirmed by the operator.

    No adjustments are made automatically without operator control. Nearly every CEMOS DIALOG offers comprehensive help. If a manual adjustment must be made, CEMOS DIALOG uses a graphic to explain the setting procedure to the operator.

    Suggestions for mechanical adjustments.

    As CEMOS DIALOG considers the entire crop flow, the operator can also request suggestions for adjustments to mechanical components. If, for example, a crop flow problem arises in the cutterbar, CEMOS DIALOG contains corresponding text messages and illustrations to assist the operator in correcting it.

Crop flow. Committed to productivity.

LEXION 780-740

Optimised. The feeder housing.

The extremely high performance of our LEXION combine harvesters begins with the feeder housing. A completely new feeder housing system ensures that we live up to our high standards.

Conventional feeder housings use chains to link the feeder slats. But now, instead of chains, belts are used to link the feeder slats with each other. The belts are driven by means of teeth on the underside. This arrangement ensures a powerful feed action, even when working with large quantities of material, as well as powerful reversing. Compared with a conventional feeder housing, the belt conveyor has a number of decisive advantages:

  • Smooth and quiet operation
  • Long service life and constant tension
  • Very durable and resistant to damage caused by foreign objects
  • Universal feeder housing.
    LEXION 780-740

    A shallow intake angle to the threshing parts facilitates optimal crop flow. Rugged intake chains or belts with feeder slats ensure high stability while a replaceable wear plate guarantees long service life.

  • HP feeder housing.
    LEXION 780-740

    The HP (header pitch) feeder housing allows manual adjustment of the cutting angle to adapt to all field conditions. From the central position the cutting angle can be moved 8° back and 11° forward. The mechanical adjustment is performed by means of a top link on the feeder housing.

  • HP hydraulic feeder housing.

    Hydraulic adjustment of the cutting angle is performed by means of a hydraulic ram. The cutting angle can be stored along with the four possible cutting heights. In laid crops in particular, when short stubble is required, the cutterbar is always at the optimal cutting angle.

  • V channel feeder housing.
    LEXION 780-740

    With the flexible positioning of the cutterbar mount, the V channel facilitates fast and easy mechanical adjustment of the cutting angle, even with a front attachment fitted. This ensures optimal adaptation to all field conditions and different types of tyres. The cutting angle is adjusted from one central point and transmitted in parallel to both sides. The cutting angle can be read on a scale.

Unique APS threshing system.

Only CLAAS offers this outstanding high performance patented system with a pre-accelerator in the threshing unit. The decisive competitive edge of CLAAS appears well before the threshing drum, with dramatically improved acceleration of the crop flow from 3 m/s to 20 m/s, which triggers a chain of extremely efficient processes:

  • The pre-accelerator separates the crop more thoroughly
  • The crop flow is particularly even and up to 33% faster
  • Higher centrifugal forces sort considerably more grains
  • Up to 30% of all grains are already sorted in the pre-separation concave directly below the accelerator, significantly reducing the load on the main concave

Thus there is a net performance increase of up to 20% with no rise in fuel consumption.

LEXION 670-620

Top quality grain with the APS system.

The APS system is equipped with multistage adapters for optimal deawning. With the intensive threshing component and the deawning plates, which can be engaged in just seconds via a lever on the feeder housing, APS ensures outstanding grain quality.

LEXION 670-620

Synchronised function.

The accelerator, threshing drum and impeller can be driven by a central variator. Each change in drum speed causes a corresponding adjustment of the speed of the accelerator and impeller.

The result is protective crop handling with even crop flow throughout.

LEXION 670-620

More safety and reliability. AUTO CROP FLOW.

What can we do to make harvesting operations safer and more reliable? In extreme harvesting conditions, the operator has to concentrate fully all the time to be able to ensure trouble-free operation. It is often the case that there are only a few days during which grain can be harvested while at optimum quality – and it is precisely then that every minute of operation counts.

Fast response.

If a preset slip limit is exceeded, the following measures are triggered automatically:

  • Cutterbar brake is activated
  • Feeder unit and front attachment are switched off
  • Cruise control or CRUISE PILOT: speed is reduced to 1.5 km/h if the systems are active
  • Grain tank discharge is switched off if it is active

These measures ensure that no more crop material enters the machine. This reduces downtime resulting from blockages or damage.

LEXION 600 straw walker / 2013

Effective straw walker technology.

The APS threshing system operates so efficiently that only about 10% of the grains run through the residual grain separation stage in the LEXION. 90% of the grains have already been separated from the straw by APS.

The even flow of straw on the open-bottomed straw walkers with an extreme gradient angle ensures that practically all the grain is separated from the straw.

A separate returns pan sends the grains on their way to the preparation floor.

Residual grain separation occurs on a total length of 4400 mm across four straw walker steps. The LEXION 670/660/650 models are equipped with six straw walkers and the LEXION 630/620 models with five. Centre and side extensions are available. Even large volumes of straw are transported quickly and easily.

LEXION 670-620

MSS loosens things up.

Thorough loosening of the straw mass is critical for high separation efficiency, particularly under difficult field conditions such as wet straw or green growth. This is why all LEXION straw walker combines are equipped with the multifinger separation system (MSS), a drum with controlled tines positioned over the straw walkers. It ensures effective residual grain separation under all conditions.

  • Two-stage pre-cleaning.

    LEXION 600 cleaning system / 2013

    A dual-ventilated straw walker step ensures intensive pre-cleaning. The multi-stage turbine fan, which is continuously adjustable from the cab, creates the necessary air flow. The fans ensure constant air pressure with uniform distribution, even with varying sieve loads, effectively increasing the cleaning capacity.

  • 3D-cleaning system.
    LEXION 670-620
    • Dynamic side slope levelling via active control of theupper sieve
    • Completely consistent performance on side slopes up to 20%
    • No wear - completely maintenance free
    • Fast, simple retrofitting
    • Together with the AUTO CONTOUR, it is the ideal "hillside package"
  • Returns and the GRAINMETER.
    LEXION 670-620

    The fill level and composition of the returns enable conclusions to be drawn about the best equipment settings to use. The cab also enables the operator to view the well-lit returns directly whilst seated.

    In all LEXION models, the fill level indicator can be complemented by the GRAINMETER. The electronic returns quality display also allows convenient checking of the proportion of grain in the returns in CEBIS.

    This data enables the operator to optimise the equipment settings manually to utilise the full production capacity of the LEXION.

LEXION 670-620

NEW: AUTO SLOPE. Automatic fan control.

Using the machine to harvest fields which are not level presents the cleaning system with a particular challenge. If the machine is operating uphill, the fan speed must be reduced to prevent grain losses from the sieve pan.

On the other hand, during downhill operation, the fan speed must be increased to maintain the crop flow in the cleaning system and so ensure that the grain is separated. AUTO SLOPE now adjusts the fan speed to the conditions, the starting point being the fan speed set beforehand by the operator.

LEXION 670-620

CRUISE PILOT: automatic forward travel control.

The CLAAS CRUISE PILOT automatically controls the harvesting speed for the best results on the basis of the engine load. Depending on the travel mode, the system uses various machine parameters simultaneously for control: ground speed, crop volume in the feeder housing and grain losses.

The following travel modes are available, the parameters always being adjusted on the basis of the engine load:

  • Constant speed – specified target speed
  • Constant throughput – specified target throughput
  • Constant throughput with losses – specified target throughput and loss rate

The factor responsible for restricting the harvesting speed, e.g. engine load, losses or throughput, is indicated in CEBIS.

To enable superior control of the LEXION’s power, you can set a maximum speed and five control response levels with quick, easy operation via the HOTKEY.

How you benefit:

The predictive CRUISE PILOT system responds before peak system loads occur. This keeps your LEXION running automatically at the upper limit of productivity at all times and gives better harvest results.

LEXION 670-620

Grain tank. The choice is yours.

With the LEXION, you can select whichever grain tank capacity best meets your requirements:

With a maximum discharging rate of 130 litres per second, the grain tank is emptied completely in less than two minutes. Grain tank discharge auger tubes in different lengths ensure that the right configuration is always available for the different cutterbar widths.

ModelDischarging rate (l/s)Grain tank cap. (l)
LEXION 670130/11012000/11000
LEXION 670 MONTANA 11010000
LEXION 660130/11011000/10000
LEXION 65011010000/9000
LEXION 630110 / 809000
LEXION 630 MONTANA110 / 809000
LEXION 620110 / 809000/8000

  • PROFI CAM – everything in view.
    LEXION 670-620

    All LEXION models can be equipped with a PROFI CAM at the end of the grain tank discharge auger tube. This camera position has been chosen precisely to allow up to three processes to be monitored simultaneously on a colour display from the comfort of the cab:

    • Grain tank discharge auger tube deployed: transfer process
    • Grain tank discharge auger tube retracted: distribution of chopped material
    • Grain tank discharge auger tube retracted: rear of machine during reversing or on-road operation

    Up to four cameras can be connected to the system and simultaneously feed their images to the colour monitor in the cab.

  • CEBIS rear camera.
    LEXION 670-620

    The image from the camera fitted on the rear hood is fed straight to the CEBIS screen. There is no need for an additional screen in the cab.

    The image from the camera is displayed automatically on the CEBIS screen as soon as the multifunction control lever or CMOTION is used to move the LEXION backwards. It is also possible to use the DIRECT ACCESS button to call up the image from the camera.


The task of assessing the grain quality, that is to say assessing the proportion of broken grains and non-grain constituents (NGC) in the grain tank, calls for a certain level of experience and a high degree of concentration on the part of the operator. The task is complicated by the segregation of the crop in the grain tank caused by the discharge cone. NGC consist of straw, chaff, ear tips and dust. The GRAIN QUALITY CAMERA, which is fitted on the elevator head, is capable of assessing the crop visually and is available for the LEXION 670 and 660.

Automatic image evaluation.

The images captured by the GRAIN QUALITY CAMERA are evaluated continuously in a fully automatic process. Thanks to the position of the camera on the elevator head, the data obtained are very reliable as the material has not been segregated and the camera acquires a direct image of the crop flow.

LEXION 670-620

More performance. More convenience. The new straw chopper.

Sometimes, bigger is better. Crop intake and transport are improved significantly by the increased diameter of the new straw chopper. The extended floor of the straw chopper increases the duration of the transit of the chopped material and accelerates it to a significantly greater degree. When used with the standard deflector, this increases the projection distance and spreading quality drastically.

CLAAS straw management. With SPECIAL CUT.

From the straw walkers, the straw moves directly to the chopper, which can be varied in intensity depending on the operating conditions. Up to 88 closely arranged dual bladed knives, a cross blade and a static knife array are the recipe for finely chopped straw. The LEXION also has a swivelling grating element for the best straw chopping and spreading. The finely chopped material is subsequently fed to the power spreader.

  • Convenient optimisation of chopping quality.

    In the straw chopper, both the friction concave plate and the static knife array can be adjusted hydraulically. This means that the chopping quality can be adjusted in CEBIS while the machine is working, thereby enabling a flexible reaction to field conditions. A mechanical adjustment system, which is operated by two levers without the need for any tools, is also available.

  • Switchover to swathing from the cab.

    Getting out the cab is now history, at least when it is a matter of switching over the straw chopper from swathing to spreading chopped material. This task can be performed effortlessly from the cab via CEBIS. If chopping is required for only certain parts of a field, the operator can switch the machine over in a matter of seconds.

LEXION 670-620

Mechanically driven power spreader.

Perfect straw spreading of the highest quality is guaranteed by the mechanically driven power spreader. The two counter-rotating spreading rotors are driven by a belt and therefore always run at a constant speed. This unique drive concept ensures consistent spreading quality. The new power spreader really comes into its own in fields characterised by changing conditions (dry standing straw, wet and heavy laid straw).

LEXION Power spreader / 2016 / en

Performance-map-controlled spreading.

Each spreading rotor has two movable deflectors whose spreading width can be adjusted either together or separately. This allows the system to be adjusted to any conditions encountered in practice. In this way, the LEXION is able to spread straw efficiently using minimal energy – even under such unfavourable conditions as extremely high straw volumes, differing degrees of straw moisture, strong crosswinds or sloping terrain.

LEXION 670-620

Automatic discharge direction adjustment.

All LEXION models with a power spreader can be equipped with two sensors for automatic adjustment of the direction in which the chopped material is discharged. The sensors are fitted on the light brackets at the left and the right of the machine. The operator can adjust the sensitivity of the sensors easily using CEBIS.

LEXION 670-620

Even chaff distribution.

From the sieve pan, the short straw and chaff are routed to the chaff spreader or the chaff fan. The chaff spreader is hydraulically driven and spreads the sieve pan discharge evenly behind the machine. The speed and spreading width can be adjusted individually with a flow control valve.