For 2004, CLAAS has introduced a new range of LEXION combine harvesters that incorporate considerable changes in both style and substance compared to the current range launched in 1997. In addition two new MEGA models give CLAAS one of the widest range of models ever offered by the company.
The CLAAS LEXION range has become synonimous with high output harvesting that others find hard to match. Redesignated the LEXION 500 range, these new models, aside from their contemporary styling, incorporate many new features designed to provide users with even greater throughput to lower production cost on arable farms. In addition, a new contemporary styling sets these models apart from the old LEXION range.
Comparing old with new, CLAAS UK reckon that the new top-of-the-range LEXION 580 will have the capacity to clear up to 200ha (500ac) more per season than a previous Mercedes engined LEXION 480, and overall will have the capability to harvest between 1,000ha (2,500ac) and 1,200ha (3,000ac) a season.
For those who don't need the sophistication of the LEXION range, completing the 2004 line-up of CLAAS combines are two new MEGA models based on the current MEDION 330 and 340 models, plus the existing MEDION 310 has been retained.
LEXION 500 range
In all some 15 LEXION 500 models are available ranging from the LEXION 510 to the LEXION 580. The range includes 3 five straw-walker and 4 six straw-walker models including a new six walker entry level model, the LEXION 540C which has the same engine and grain tank capacity as the LEXION 440 that it replaces. Completing the line-up are two rotary separation versions, two tracked machines that feature a unique suspension system and four MONTANA hill-side variants.
Power output
A noticeable feature of the new LEXION 500 range is the greater power output and higher torque when compared to current models. All models in the range are now TIER II compliant and whilst, on average, power output has been increased by 31%, there have been notable increases for the two rotary separation models, the LEXION 570 and LEXION 580.
These machines have been given a power reserve so that when the engine revs drop by 100 rpm the available horsepower will rise to 435hp on the LEXION 570 and a world leading 512hp on the LEXION 580 (rated in EWG80/1296).
Whilst the majority of models retain the same Caterpillar engine used in equivalent LEXION 400 series models, there have been changes at the top-end. Both the new LEXION 560 and 570 now feature 10 and 12 litre CAT power units in place of the 9 litre engine used previously. But the biggest change is on the LEXION 580 which moves from a 412hp 12 litre CAT engine to a massive V8 16 litre, 512hp twin-turbo Mercedes power unit, which is the same engine as on the 605hp JAGUAR 900 forage harvester.
New 9.0m VARIO cutterbar
Following on from the success of CLAAS' unique VARIO header, which allows the distance between the knife and auger to be adjusted from the seat, CLAAS has now introduced a new 9m (30ft) version for use with the LEXION 580.
All VARIO cutterbars are fitted with a full width grain saver along the back to reduce losses and make them better suited for direct cutting oilseed rape. In addition, for even greater cutting efficiency, it is now possible to fit the LASER PILOT automatic steering system to both sides of the cutterbar.
Soft Start and Instant Stop
To reduce stress within the cutterbar drive system, all cutterbars now incorporate a 'Soft-Start' engagement system that gradually engages the drive to reduce sudden peak loads on the drives and clutches.
In addition an Instant Stop cutterbar brake is available. This will be especially useful on stony soils, because at the press of a button on the joystick control, the cutterbar drive system can be instantly stopped to reduce header and elevator damage.
Threshing
All straw-walker models now come as standard with the CLAAS MSS secondary separation system previously only fitted to LEXION Evolution models. This consists of a drum fitted with banks of retractable fingers that penetrate deep into the crop flow and improve secondary separation, especially in damp or green strawed crops compared to the previous ISS system.
Grain Tank Increases
In view of their greater throughput, all LEXION 500 models are fitted with larger grain tanks, with volumes increased by up to 12% and all feature electronically operated grain tank lids. It is also notable that unlike other hillside machines, the grain tank capacity on MONTANA models is not reduced.
New straw choppers
To improve chopping for modern cultivation practices and to handle the greater throughput of straw, all models in the LEXION 500 range are equipped with updated straw choppers.
The majority of the LEXION 500 range and MONTANA models are equipped with the new Special Cut II straw chopper. Incorporated into the chopping unit is a new Fine-Chop Step, which can be revealed to deflect material back into the chopping blades for a more aggressive chop.
As an option, the LEXION 570 can be fitted with a Power Spreader. This consists of a radial spreading system using spinning discs which has a low power requirement and includes powered deflectors that are adjustable from the operator's seat.
In addition, all LEXION 510 to 560 models can be fitted with a new design of chaff spreader, which is fitted lower and further back than previously to avoid interference with the grain loss sensors and allow easier access to the sieve box.
Unispreader ll
One of the big features of the LEXION 480 is the effectiveness of its Uni-spreader chopping system. On the LEXION 580, the new Unispreader II incorporates a number of changes to provide even better results.
Firstly where the combine is to be used on hills, an optional high capacity independently driven chaff plate can be fitted. This has a 55% longer stroke and eliminates spillage when working downhill. Other changes include a new design of feeding funnel to allow for higher intake and the kinematics have been changed so that the Unispreader provides a more even spread of material.
LEXION Terra-Trac
CLAAS lead the way in the development of tracked systems for combines and this is proving an increasingly popular option for the reduction of transport width, compaction and improved hill climbing.
CLAAS has now taken the Terra Trac system a stage further by developing a new suspension system, the first to be fitted to a combine harvester. The suspension system uses solid rubber pads that both absorb shock loadings and also avoid uncontrolled swaying, and gives the ride comfort over and above that of a normal wheeled machine.
New cab
The cab on the new LEXION 500 range has also been subject to a considerable number of improvements to provide greater operator comfort and convenience.
Externally all-round lighting has been improved. New courtesy delay lights assist the operator when packing up at night and stubble lights below the cab make it easier for the driver to see the stubble behind the cutterbar. An optional lighting package is available that includes Xenon front lights, side finder lights on the mirror arms, a magnetic portable work light, and service lights under the side panels.
Other external changes include new front steps and guard rail, plus a revised rear ladder and latch system for easier access.
Inside the cab, overall width has been increased to the rear of the cab, which has allowed a full width trainee seat to be fitted, which contains an independently powered refrigerator.
Other changes to the cab include the provision of improved night lighting of the main control console, and a drawer under the driver's seat for storing the operators' manual and other equipment.
A number of changes have been made to the controls. A new multifunction control lever now includes buttons for spout pivot and activating the discharge auger,
