Claas recently announced the launch of its Lexion 5000/6000 combines for the Irish and UK markets. The revamped five- and six-straw-walker series replaces the 600 series machines.

All models boast the same upgrades as the hybrid 7000/8000 series. The main upgrade is the new APS Synflow threshing system. Out of the seven new models, there are four six-walker and three five-walker machines.

The new threshing system has a 755mm diameter 10-rasp-bar threshing drum, 26% larger than the drum on the outgoing 600 range. A new 600mm separator drum behind this provides additional separation.

The Claas Lexion 5000/6000 range is made up of four six-walker and three five-walker machines.

These larger-diameter drums allow for an increased surface area and shallower concave wrap angles at 132° and 116° respectively. Shallower wrap angles mean less straw damage and a reduced power requirement. The new five-walker Lexion 5000 (1.30m2) has a larger concave area than the current six-walker Lexion 670 (1.22m2). Another benefit of increased drum diameter is reduced rotational speeds. Speeds are infinitely variable using Cebis from 330-930rpm synchronised across all four drums.

Yield measuring is done using the latest Quantimeter system via a pressure cell in the grain delivery elevator

Main concaves are hydraulically adjustable using Cebis, moving in a parallel manner. The firm say 40% of the main concave can be removed through the side of the machine. A pivoting concave bar between the pre-separation and main concaves can be engaged using Cebis for greater threshing intensity. Yield measuring is done using the latest Quantimeter system via a pressure cell in the grain delivery elevator.

Advanced technology

Cemos Auto Threshing is capable of adjusting threshing and separation dependent on the grain quality camera and Quantimeter. Auto Crop Flow at the same time monitors crop flow through the walkers and the secondary separation system, restricting crop intake should it detect a blockage.

Models feature Dynamic Power engine management, adjusting power output relative to load

Grain tank sizes range from 9,000l to 13,500l, with unloading times and operator access improved. Like the new hybrid machines, the new walker models have an updated cab, control arm and touchscreen Cebis.

The new straw walker models are powered by either MAN or Merc engines ranging from 313hp to 507hp. Models feature Dynamic Power engine management, adjusting power output relative to load.

Updates have been made in terms of drive systems and clutches. A new straight driveline design reduces power losses and the number of belts. All models are fitted with 40km/h transmissions with larger tyre options available than before.