Straightforward threshing with a large drum and maximum operating reliability
As well as focusing on using high-quality, proven components, delivering uncompromising threshing quality and ensuring operating reliability, even under difficult harvesting conditions, the development team have ensured that the EVION is easy to use. It is therefore equipped with a single-drum tangential threshing unit with a large, 600 mm threshing drum and a synchronised impeller combined with five 4.40-metre-long straw walkers and a feeder housing width of 1,420 mm. This results in an impressive threshing concave area of 0.95 m2 and a separation area of 6.25 m2 provided by the straw walkers. Complemented by the standard preconcave flaps under the threshing drum, this arrangement enables high throughput while also delivering excellent grain quality.
The threshing drum speed is infinitely adjustable from the CEMIS 700 terminal. A speed range of 480 to 1,150 rpm (420 – 1,080 rpm with reduction kit) can be used in the EVION CLASSIC, while the EVION MAXI with its two-stage belt drives supports speed ranges of 220 to 630 and 415 to 1,150 rpm. Concave clearance adjustment is performed hydraulically from the cab and features integrated overload protection provided by a diaphragm accumulator to prevent blockages from occurring in the threshing unit. As the threshing concave in both the CLASSIC and the MAXI versions of the EVION is a MULTICROP unit, conversion measures are only needed rarely, if ever, when switching between common threshing crops. When conversion is required, the concave segments can be swapped out easily through the stone trap. For maize threshing, cover plates can be fitted between the eight rasp bars.
In order to provide more effective secondary separation and greater throughput, the centre risers of the straw walkers have been redesigned to loosen the crop mat even more effectively and to enable a faster transfer to the next straw walker racks. Another important factor – in addition to the threshing concave overload protection – in ensuring operating reliability is the sensor-based monitoring of the crop flow on the straw walkers. As soon as any blockages begin to develop there as a result of difficult harvesting conditions, the operator receives early warning both in the form of an audible alarm and as a visual alert on the CEMIS 700 terminal display. In addition, the optional CEMOS AUTO CROP FLOW automatically deactivates the front attachment and the feeder unit in the event of any imminent risk of blockages on the threshing drum or serious belt slippage so that no more crop is fed in. This avoids unnecessary downtime.
High-performance cleaning with convenient adjustment
Despite the compact exterior dimensions of the EVION, the development team were able to integrate an extremely efficient cleaning system. The sieve pan works with the upper and lower sieves moving in opposite directions and has a total sieve area of 4.80 m2. The sieve design, which features frogmouth openings with optimised flow characteristics, has already proven itself over and over again in the LEXION and TRION under extremely varied operating conditions.
In addition to electric sieve adjustment, the standard equipment for all EVION models includes a loss measurement system. Adjustment of the speed of the radial fan is performed from the cab – and can even be controlled automatically with the optional AUTO SLOPE functionality when harvesting uphill or downhill. An inspection window allows the returns to be viewed conveniently from the operator's seat. The 3D cleaning system, which is able to compensate for a lateral tilt of up to 20 percent when harvesting on slopes, is standard for the BUSINESS equipment line and option for the CLASSIC.
Large grain tanks and powerful elevators
The grain tank integrated behind the cab holds 5,600 l in the EVION 410, 6,500 l in the EVION 430 and 8,000 l in the top-of-the-range EVION 450. Sensors alert the operator when the fill level reaches 70 percent and then 100 percent. In addition to this functionality, a large grain tank inspection window gives the operator a direct, comprehensive view of the fill level and grain quality. When it comes to unloading, all three EVION models benefit from the 330 mm diameter of the grain tank unloading tube and the resulting 90-litre-per-second unloading rate – meaning that offloading can be completed in 1 to 1.5 minutes. The 105-degree pivot angle of the grain tank unloading spout ensures that the operator always has a perfect view of the offloading process. A pivoting grain tank unloading tube spout, as already used in the TRION and LEXION, is available as an option to provide high-precision control of the grain stream directed at the transport vehicle.
Another powerful argument in favour of the EVION models is to be found in the grain elevator whose increased conveying capacity of 34 l/s means that it has what it takes to harvest grain maize in high-yield sites with picking front attachments up to 6 rows wide.
Straw chopping and spreading with no compromises
At medium to high-yield locations in particular, farmers attach great importance to good straw chopping and spreading. This is why, in a first for this class, the EVION is available with an optional 72-knife straw chopper as an alternative to the standard 52-knife version. Both shear bar and friction bar can be adjusted without tools while the switchover from chopping to swathing is performed at the right-hand side of the straw discharge hood. The straw guide plates are adjusted manually to the working width so that uniform distribution is ensured even when operating with a cutterbar width of 6.80 m. Chaff and short straw are distributed across the working width by optional, hydraulically driven chaff spreaders.
