We use cookies (ours and those of third-party providers, e.g. Google Analytics) to simplify the use of our web pages and adjust the content more closely to your interests. Simply continuing to use our web pages sets only those cookies that are required for technical reasons; acceptance means that all cookies (including marketing cookies) will be set. Your consent is voluntary, and can be withdrawn at any time with future effect.

For further information, see our data protection statement.


LEXION 780-740

Built on experience.

When real-world requirements and experience are combined with the latest research findings, the result is a machine which impresses on every count. We've listened to you and have designed a machine that is tailored precisely to your needs. The new LEXION.

LEXION 780-740

Built on experience.

When real-world requirements and experience are combined with the latest research findings, the result is a machine which impresses on every count. We've listened to you and have designed a machine that is tailored precisely to your needs. The new LEXION.

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.


More top technology. APS HYBRID SYSTEM.

The APS HYBRID SYSTEM – threshing technology from CLAAS – represents the combination of two outstanding technologies: the tangential APS threshing system and the highly efficient ROTO PLUS residual grain separation system.

Only CLAAS integrates both systems in one machine, with APS giving you a significant competitive edge over other systems.

This powerful duo offers you unbeatable advantages:

  • Drum speed adjustment in the threshing system independent of rotor speed
  • Individual adaptation of the entire process to changing field conditions over the course of the day
  • Protective threshing with top throughput


More pre-acceleration. APS.

  • 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.

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.

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 780-740

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.

The AUTO CROP FLOW function is intended to support the operator in operating the machine at its performance limits. It provides the necessary safety margin by automatically monitoring the components relevant to the crop flow and initiating the necessary measures.

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.


High-performance rotors.

Eccentrically mounted rotors generate tremendous centrifugal force to separate the remaining grains from the straw. With a diameter of 445 mm and a length of 4.20 m each, the rotors in the LEXION provide a huge separation area.

The mixture of grain, straw and chaff first reaches the preparation floor through the returns pan before passing over the straw walker steps to the sieve pan. This significantly reduces the load on the sieve pan.

  • Conveniently adjustable rotor flaps.

    Automatic control by means of CEMOS AUTO SEPARATION.

    All LEXION models have hydraulically operated shutters to adjust the rotor separation area. The HOTKEY rotary switch is turned to reduce the open separation area of the rotor concave in steps simply and easily from the cab. This reduces the sieve load under very dry conditions and under wet field conditions the large separation area achieves more effective separation of residual grain. The result of variable rotor separation area adjustment is maximum throughput under all harvesting conditions.

  • Continuously adjustable variator.

    Automatic control by means of CEMOS AUTO SEPARATION.

    The rotor speed can be continually adjusted with ease from the operator’s seat with the CEBIS rotary switch in the LEXION 770 – 740 models, anywhere from 350 to 1050 rpm regardless of the threshing drum speed. This allows quick adjustment of the rotation speed to different crops as well as harvesting and straw conditions, making it easy to achieve the best work rates with the combine.

LEXION 4D-cleaning system / 2016 / en

CLAAS 4D-cleaning system.

Using the machine to harvest fields which are not level presents the cleaning system with a particular challenge. With the machine running along a side slope, the material in the residual grain separation system moves to the side of the returns pan closest to the bottom of the slope. As a result, the preparation floor and the sieves are loaded on one side only. And when the machine is running up or downhill, the fan speed and the sieve position have be adjusted in order to attain the optimum cleaning performance and avoid losses.

The 4D-cleaning system is another module within CEMOS AUTOMATIC. It comprises the 4D function to control the rotor flaps and AUTO SLOPE to adjust the fan speed.

The scope of the 4D-cleaning system includes a third pair of rotor flaps under the third separator concave. Furthermore, the individual rotor flap segments are divided so that the left or right half can be opened and closed separately.

  • How it works.

    In order to ensure even loading of the cleaning system, 4D controls the rotor flaps on the basis of the transverse and longitudinal tilt as well as the current load on the cleaning system. In this way, the cleaning performance remains almost constant, even in difficult terrain. 4D adjusts the position of the rotor flaps automatically, acting in the background as an aid to the operator.

  • Benefits.
    • Uniform distribution of material from residual grain separation process
    • Although machine is operating on an incline, there is even loading of the returns pan, preparation floor, upper sieve / lower sieve
    • The fan speed is adjusted automatically
    • Improved sieve pan performance through adjustment of air volume
    • Cleaning performance remains stable when operating on transverse and longitudinal slopes (in undulating terrain)
    • More throughput and reduced losses on slopes

JET STREAM / 2015 / en

More thorough cleaning. For impressive results.

The JET STREAM cleaning system is designed especially to work with the ROTO PLUS residual grain separation system.

  • Dual ventilation step
  • Height of the first step: 150 mm
  • The long flow compensation channel ensures a consistent, extremely strong air blast
  • 8-stage turbine fan (LEXION 780 / 770)
  • 6-stage turbine fan (LEXION 760 / 750 / 740)
  • Electrical sieve adjustment from the cab

Automatic control by means of CEMOS AUTO CLEANING and AUTO SLOPE.

LEXION 780-740

Dual ventilation.

A dual ventilated step ensures intensive pre-cleaning while the multi-stage turbine fans, which can be adjusted continuously from the cab, create the necessary air flow.

Preparation floor.

Pre-sorting of the grains (bottom) and chaff and broken straw (top) takes place on the preparation floor. The resulting lessening of the load on the upper sieve increases the cleaning capacity. The six (LEXION 780 / 770) individual plastic elements - or four in the case of the LEXION 760 / 750 / 740 - can be easily pulled out to the front for cleaning the preparation floor after harvesting is completed.

LEXION 780-740

NEW: AUTO SLOPE. Automatic fan control.

Hilly terrain calls for extra concentration on the part of the operator. This is precisely why the AUTO SLOPE function provides support for adjustment of the cleaning system. If the machine is operating uphill, the fan speed must be reduced in order to avoid 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.

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.


CEMOS is the CLAAS umbrella term for all the systems which optimise machine performance. There are two different versions of CEMOS:

  1. Dialogue-based systems, such as CEMOS DIALOG or CEMOS Advisor. These guide the operator through a number of steps in order to achieve the optimum machine configuration. This process requires the operator to confirm the suggested settings or apply them manually.
  2. CEMOS AUTOMATIC, the term which covers various functions which optimise the machine and a particular process entirely automatically. All the operator has to do is activate the automatic system. The functions include CEMOS AUTO CLEANING, which optimises the cleaning process, and CEMOS AUTO SEPARATION, which optimises the ROTO PLUS residual grain separation.

A perfect fit.Solutions for Controlled Traffic Farming.

The VARIO 1230, 1080 and 930 cutterbars are a perfect fit for 12 m, 10 m and 9.0 m Controlled Traffic Farming systems. CLAAS can provide the appropriate grain tank unloading tubes for these cutterbars.

In this way, the transfer vehicle can run in the track left by the combine harvester. The VARIO 1230 is used in combination with the 7 XL grain tank unloading tube for 12 m Controlled Traffic Farming systems. The 7 XL grain tank unloading tube is simply folded for on-road travel.

NEW: Grain tank capacity of up to 13,500 l.

After the threshing unit, residual grain separation and cleaning systems have done their work, the cleaned grain is collected in the expandable grain tank. Here too, with a large volume of up to 13,500 litres, the LEXION demonstrates its capacity for high performance, enhanced by numerous other strengths.


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. 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 780, 770 and 760.

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.

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 II.

From the rotors, the straw moves directly to the chopper, the intensity of which can be varied depending on the conditions. Up to 108 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.

NEW: 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.

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.

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.