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LEXION 780-740.

Engine and Running gear.

Equipment development at CLAAS means an ongoing effort to achieve even greater efficiency, reliability and profitability. This naturally applies to all aspects of a CLAAS combine harvester, forage harvester or tractor. The drive system, too, plays a crucial role, encompassing much more than just a powerful engine.


LEXION 780-740.

Engine and Running gear.

Equipment development at CLAAS means an ongoing effort to achieve even greater efficiency, reliability and profitability. This naturally applies to all aspects of a CLAAS combine harvester, forage harvester or tractor. The drive system, too, plays a crucial role, encompassing much more than just a powerful engine.

More power reserves. The engines.


Power and intelligence in one.

The new Mercedes-Benz engines with a displacement of up to 15.6 l deliver top performance for the LEXION while keeping operating costs down. With the new Mercedes-Benz engines, all LEXION 700 models meet the requirements of exhaust emissions level Stage IV (Tier 4). With a displacement of 15.6 l, the two top models, the LEXION 780 and 770, have copious reserves of power. In the case of the LEXION 780, in fact, a maximum output of 626 hp is available. The LEXION 750 and 740 models have a displacement of 10.7 l and are now also equipped with DYNAMIC COOLING. Only the LEXION 760 is powered by a Perkins engine, which, like all the others, benefits from the full range of CLAAS Service support.

The facts.

  • Mercedes-Benz OM 473 LA, 15.6 l (LEXION 780 / 770)
  • Perkins 2206F, 12.5 l (LEXION 760)
  • Mercedes-Benz OM 470 LA, 10.7 l (LEXION 750 / 740)
  • Emissions standard Stage IV (Tier 4)
  • Optimised combustion process

  • Optimised combustion process
  • Improved engine running characteristics
  • High torque
  • Low fuel consumption
  • Optimal power transmission

Stage IV (Tier 4) through SCR and EGR.

All LEXION 700 models comply with the Stage IV (Tier 4) emissions standard by means of SCR (Selective Catalytic Reduction). This process converts the nitrogen oxides in the exhaust flow into pure nitrogen and water. The urea solution necessary for this is carried in an 80-litre tank. In addition, EGR (Exhaust Gas Recirculation) is used to mix a proportion of the engine exhaust gas with the intake air. This reduces the combustion temperature in the engine which in turn largely prevents the formation of nitrogen oxides.

Turbo-compound technology for LEXION 780 / 770.

To increase efficiency at full load, the 15.6 l engine is equipped with a second turbine in the exhaust flow from the turbocharger. The energy recovered by this turbine is transferred to the engine flywheel, thereby increasing its efficiency by 3% (up to 37 kW). As well as increasing efficiency, this technology makes for very smooth running and stable torque.

More intelligence for keeping cool. DYNAMIC COOLING.

Now for all LEXION 700 models.

All LEXION 700 models are equipped with a revolutionary, horizontal cooling system. It is optimally situated in a horizontal position behind the engine compartment. A large rotating sieve with a diameter of 1.6 metres ensures that it is able to take in sufficient fresh air at all times. Permanent cleaning is performed by an automatic dust extraction system. The large radiator package has sufficient reserves to ensure continuous cooling while also providing the benefit of extended cleaning intervals.


Save fuel through variable fan drive.

Unique among combine harvesters, all LEXION models are equipped with a variable fan drive whose speed is adjusted automatically in accordance with the degree of cooling required. This makes it possible to save power which the rest of the machine can call on. This intelligent system only draws power when it really requires it.


It's curtains for heat build-up.

The design of the cooling system provides an ideal air flow. Air is drawn in at the top, passes downwards through the radiator and is then vented through the engine compartment and side cooling fins.

This creates a particularly useful curtain effect. The air flow actively inhibits dust from rising, thus preventing soiling of the radiator and effectively functioning as a permanent cleaning system. This has two advantages for you: sufficient cooling at all times and long maintenance intervals.


TERRA TRAC. More ground protection in the field.

Thoroughly proven in practical use.

CLAAS has offered its proprietary TERRA TRAC system for over 20 years, and there are now countless TERRA TRAC drives in use all around the world. The CLAAS TERRA TRAC has proven itself in practical use time and time again, even in the most challenging of conditions.

At a glance: the TERRA TRAC crawler track assembly.

Protecting the soil and preventing compaction during harvesting means you won’t have to worry about crop losses in the future.

  • Transport width only 3.29 m (LEXION 760 / 750)
  • Transport width 3.49 m (LEXION 780 / 770)
  • Soil protection: 66% lower ground pressure than with wheeled machines
  • Improved traction (maize/rice/wet conditions/slopes)
  • Greater stability on slopes (side slopes)
  • Less drive resistance, less slippage, lower fuel consumption
  • Longer operating times, better seasonal performance
  • Fully suitable for road travel at 30 or 40 km/h

Three different chassis heights can be set in CEBIS to adjust the machine's ground clearance.


More manoeuvrability. The 4-link axle.

Four links for exceptional manoeuvrability.

LEXION – a commitment: to the active pursuit of new solutions. This design, developed and patented by CLAAS, sets new standards with two outstanding advantages. It ensures unrestricted mobility, even with large tyres up to 1.65 metres high (30"). And it provides exceptionally high stability and load-bearing capability.

Rather than responding to uneven terrain like a conventional swing axle with just a swing motion about the suspension point, the new 4-link axle also features a lateral movement. This gives the 4-link axle considerably greater flexibility with a small turning radius.

30" tyres up to 1.65 m high.

The greater contact area results in a reduced track depth. So you are protecting the ground not only with TERRA TRAC at the front, but with the unique CLAAS 30" tyres on the rear wheels. - Tyre size 500/85 R 30 - Tyre height up to 1.65 m

  • Tyre pressure control system for steering axle.
    LEXION 700

    In order to provide even greater traction, the steering axle of the LEXION 780-740 can be equipped with a tyre pressure control system. The operator can then easily adjust the tyre pressure from the cab via CEBIS. If the required tyre pressures for road and field use have been stored, the appropriate setting is applied automatically when the on-road switch is actuated.

    As an alternative to using CEBIS, the tyre pressure can also be adjusted manually in the field by means of a toggle switch mounted in the cab roof.

    Lowering the tyre pressure in the field reduces soil compaction and slip while increasing traction. Adjusting the pressure for on-road operation increases directional stability while reducing wear and fuel consumption.

  • Hydrostatic ground drive.

    Thanks to the electrohydraulic control system, the LEXION can be equipped with the CRUISE PILOT for automatic forward travel control. But whether used in manual or automatic mode, it drives like a luxury car with such a high level of operating comfort that performance is enhanced immediately.

    Depending on the model, it is possible to select an on-road top speed of 20, 25, 30 or 40 km/h.

  • Differential lock.

    If, under extremely wet conditions, the wheels begin to slip and spin, the differential lock can be used to redirect the drive torque: from the wheel which is spinning to the one with better traction. The ability to enhance traction in this way ensures that progress can continue to be made even when the ground is wet. The wheeled versions of the LEXION 780 and 770 can be equipped with the differential lock.


    A touch of a button is all that is required to summon up the full power of the LEXION, ensuring that it can continue to operate even in the most challenging soil conditions: with maximum pulling power, yet reduced fuel consumption. The all-wheel drive operates reliably and is maintenance-free.

    The drive concept:

    • Additional traction is provided by a central hydrostatic drive on the rear axle
    • All-wheel drive with intelligent control technology can be engaged while on the move
    • Classic two-wheel drive possible by mechanically disengaging rear-wheel drive: Offers increased efficiency during on-road operation -  More pulling power