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LEXION 670-620

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 670-620

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.

Engine and running gear.


More power reserves. The engines.

Power and intelligence in one.

The new Mercedes-Benz engines with a displacement of up to 10.7 l deliver top performance for the LEXION while keeping operating costs down. With these engines, all LEXION 600 models meet the requirements of exhaust emissions level Stage IV (Tier 4). The LEXION 670 and 660 models have a displacement of 10.7 l and are now also equipped with DYNAMIC COOLING.

The facts.

  • LEXION 670 / 660: Mercedes-Benz OM 470 LA, 10.7 l
  • LEXION 650 / 630 / 620: Mercedes-Benz OM 936 LA, 7.7 l
  • Six-cylinder in-line layout
  • Emissions standard Stage IV (Tier 4)
  • DYNAMIC COOLING for LEXION 670 / 660
  • New fuel tank with 800 l capacity
  • High torque
  • Low fuel consumption
  • Optimal power transmission
  • Planar dust extraction.
    LEXION 600

    A reliable system: with planar dust extraction, the LEXION 650, 630 and 620 models benefit from high-performance cooling and comfortable reserves of cooling capacity. As air is being drawn in at the top, an automatic dust extraction system ensures continuous cleaning of the radiator. The dust is extracted downwards. Soiling of the cooling fins is reduced significantly.

  • Good accessibility for maintenance and care tasks.
    LEXION 600

    The engine platform can be reached easily via the access ladder. The radiator package can be folded up for cleaning. It is also possible to remove the air filter without tools. As a result, daily engine maintenance can be performed quickly. Service lighting on the ladder, the tank filling point and under the engine cover allows maintenance tasks to be carried out safely at night, too.

  • Everything in its place.
    LEXION 600

    Situated at the rear of the engine platform are the AdBlue tank and a holder for an air hose as well as an air gun. If the machine is equipped with a compressor, there is a compressed air connection on the engine platform which can be used to clean the machine.


More intelligence for keeping cool. DYNAMIC COOLING.


The LEXION 670 and 660 models are now also equipped with the revolutionary, horizontal cooling system. Having proved itself comprehensively in the LEXION 700 over the past few years, it is now also being adopted in the LEXION 600 series. 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 an extremely useful curtain effect. The air flow actively inhibits dust from rising, thus preventing soiling of the radiator and effectively providing permanent cleaning. This has two advantages: appropriate cooling at all times and long maintenance intervals.


More performance on steep slopes. MONTANA.

The working hydraulics: more lifting power, faster response.

The outstanding performance of the LEXION is now better then ever on steep slopes too. New working hydraulics offer improved operation of the entire MONTANA control system.

  • Higher efficiency of the working hydraulics thanks to an axial variable displacement pump (LS pump)
  • Operating pressure 200 bar (+10%)
  • Oil displacement of the working pump: 120 l/min (+50%)
  • Greater front attachment lift capacity: +10% weight / +50% faster response (proportional valve technology)
  • Maximum reversing power even when idling, 10% more torque
  • Synthetic oil with a high viscosity index provides better friction characteristics
  • Low noise thanks to constant system pressure
  • Efficient pump distributor gear


Effective threshing just like on level ground.

The drive axle is the key component of the LEXION MONTANA. Hydraulic swing rams turn the portals to adjust the wheels to the ground. The MONTANA chassis compensates cross tilt up to 17% and longitudinal tilt up to 6%. As a result, it is able to operate effectively on steep terrain and deliver a high threshing output, just like on level ground. The operator is in an optimal, comfortable seated position on any slope, enabling even long working days to be handled without stress.


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.

LEXION 670 and 660 with TERRA TRAC.

Today's traffic conditions make it increasingly difficult to transport large machines on public roads. What's more, the permitted width of vehicles transported on public roads is limited by national road traffic regulations.

A total of three different TERRA TRAC tracks in three widths are available for the LEXION 670 and 660 models. This means that there is a suitable TERRA TRAC for every requirement.


635 mm


735 mm


890 mm

A new dimension of comfort.

Your LEXION moves gently over the field on the sophisticated TERRA TRAC system, which features independent suspension for all its components (drive wheel, land wheel and support rollers). This reduces shocks to the bodywork and mechanical components, increases operator comfort and ensures better stability on corners.

  • Automatic level compensation. Hydropneumatic suspension.
    • The hydropneumatic suspension can be raised or lowered during operation by filling or emptying the hydraulic rams
    • The drive wheel, land wheel and support rollers are counter-directionally pivot-mounted; hydraulic rams with an integrated pressure reservoir support the suspension
    • This results in automatic levelling at speeds above 2 km/h for improved stability on corners
  • 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 3.49 m
    • 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 suited to road travel at 30 km/h

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

Large contact area, compact transport width.

More time to work.

Every minute a combine harvester saves in road travel improves performance in the field. The LEXION 670 TT attains a top speed of 30 km/h on the road. This means that your LEXION can travel from field to field quickly with a high level of driving safety, excellent comfort and outstanding directional stability. The system was recognised for these qualities in 2011, when it was awarded a silver SIMA Innovation Award. TERRA TRAC allows you to spend more time in the field and significantly increases results for the season. Better adaptation to ground contours, uniform stubble height, less equipment stress and 30% lower ground pressure peaks make a clear difference. After all, soil protection means greater profit.


Hydrostatic ground drive.

Hydrostatic ground drive.

The hydrostatic ground drive of the LEXION can be controlled extremely easily with the multifunction control lever without the need to operate a clutch or change gear. The series of hydrostatic drives is characterised by increased efficiency. You benefit because the power saved is available for use by the rest of the machine, the overall result being greater efficiency in operation.

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