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Krone UK marketing manager James Duggleby with the EasyFlow grass header. “Consistent chop starts with uniform feed and from the standard crop press roller to the six-roller intake, Krone harvesters optimise throughput and quality,” he explained. ...from previous page

enter the blades. There is also protection from non-ferrous objects through RockProtect which uses an accelerometer to detect if the pre-compression rollers are forced suddenly apart by a foreign object. Sensitivity can be set by the operator. When blockages are detected and the intake is reversed the crossauger and crop press roller both lift automatically providing easy access to clear any obstruction. When work resumes, both return automatically to their working positions.

High capacity, reliable chop Suitably chopped grass is critical to clamp construction and chop length must be adequate to maintain structure but achieve optimum consolidation for anaerobic fermentation. For grass with less than 20 per cent dry matter 20–30mm is suitable, but for forage

Forage demonstration with more than 20 per cent dry matter 10–20mm chop length is more suitable. Drum options for grass include the MaxFlow, with 20, 28 or 36 blades and which can also be operated with half the blades removed extending the range of chop lengths available and for increased compatibility with a mix of crops from maize cut shorter for anaerobic digesters to grass. Blades in an 11-degree chevron pattern make full use of the 630 or 800mm drum widths for smooth chopping performance and crop flow. The drums of both standard and wide-bodied models are 660mm diameter. One of the main design features is that the knives are attached to the underside of the holders rather than on top; providing twice the space to transport chopped material of standard knife mounting arrangements for higher throughput. Krone says the under-mounted design also reduces noise levels and drum wear, since all forage contact is with the knife body. Adjustment of shear bar to knife clearance is automatic and set from the cab. A single ‘knock sensor’ is capable of detecting knife to bar contact across the width, providing information to two adjustment motors. Manual adjustment remains available. To optimise potential work-rates, the drum base and accelerator back-plate are both spring-mounted to cope with uneven crop flow and allow clumps to pass through without blocking. The drum base is linked to the shear bar so that as wear occurs and the shear bar is adjusted, the preset drum clearance is maintained through the season.

Efficient power With fuel costs increasing, many of Krone’s harvester engines feature dual power curves allowing the

The EasyFlow header is available in 3.0 and 3.8m pick-up widths. The reel is cam-less for smooth delivery of forage to the intake and the tines are in a W-arrangement helping maintain constant feed rate. A triangular wheel arrangement ensures accurate ground contour following allowing the header to operate closer to the ground with reduced risk of forage contamination.

The header is removed and attached quickly and easily. The six-roller intake ensures positive and constant feed to the drum with a long 820mm distance from the metal detector to the knives to reduce the risk of foreign object damage. RockProtect is also fitted, monitoring roller movement to detect large solid objects entering.

operator to save fuel where conditions allow. In Eco-Power mode the BiG X 680, for example, produces 500hp, but in X Power mode output is up to 662hp. Automatic selection adjusts output to match demand, but manual control is also available. “The most efficient operating conditions are always with as large a swath as possible in front of the machine, and travel speed adjusted to make the most of chopping capacity,” pointed out James. “VariStream contributes to efficiency by allowing operators to push harvesters nearer their limits, knowing that if lumps in the swath temporarily exceed capacity the overload protection will operate preventing blocking.” All BiG X harvesters are available with or without 4wd, but James explained that for the UK 4wd is considered standard. Independent rear wheel suspension allows the engine to be mounted lower in the chassis than if a common bar axle arrangement was used, and a further benefit is the 55-degree steering angle saving time on headlands.

Additive dosing Krone harvesters offer flexible additive dosing options including integrated coarse dosing from 0.5–7.5-litres/ min, and fine dosing from 0.03-litres/ min–0.25-litres/min and optional dose control automatically adjusts the rate to suit the yield. The on-board multitank system allows the user to allocate tanks for additional fuel storage, or increased additive capacity up to 505 litres. Crop throw is adjustable from the cab, allowing fuel savings and reduced risk of crop spillage by reducing the throw distance when appropriate. To achieve this the back plate of the accelerator moves away from the impeller reducing crop contact with the paddles. For longer distances such as when opening up, to a trailer behind a tractor at the rear, the back-plate is moved closer so that forage is propelled with the full force of the impeller. EasyLoad automatic trailer loading is an option using spout-mounted cameras to load trailers alongside and the operator can tailor the system for various loading strategies such as trailer front or rear first for maximum continued over...

Access to the knives is very good. The versatile MaxFlow drum uses an undermounted knife arrangement which provides up to twice the space for forage to be carried compared to conventional knife-mount systems.

Swapping between maize and grass harvesting is simple with convenient fitting or removal of the maize processor. Access for maintenance is excellent.

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Farmers Guide July 2019