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Monday 5 December 2016

The cutting edge in combine technology

The revamped John Deere W and T-Series combines can boost productivity by up to 15pc

Published 29/07/2015 | 02:30

A faster unloading rate of up 125 litres/min enables the 11,000-capacity grain tank to be emptied in less than 90 seconds.
A faster unloading rate of up 125 litres/min enables the 11,000-capacity grain tank to be emptied in less than 90 seconds.
The AutoTrach hands-free steering system allows the driver to concentrate on adjustments

John Deere W- and T-Series combines have undergone a comprehensive redesign for the 2016 harvest. Many of the key components have been changed to achieve what Deere claims is the best straw walker combine performance in the industry.

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Deere maintains that the combination of the largest active separation area on the market and an enlarged cleaning shoe area will increase output by 15pc.

The main threshing drum's diameter stays at 660mm but the concave wrapping angle has been increased by eight degrees to expand the threshing area and machine throughput.

To ensure straw quality, the overshot beater's diameter has been increased to 500mm so it maintains the same angles and tip speed in the crop flow.

The rear separator drum diameter is increased to 800mm - the largest in the industry.

Together with a new separator grate, which features more openings, it allows better separation even under tough and wet harvesting conditions.

The active separation area has been increased by 41pc to 3.3 and 4msq for the 5 and 6 walker combines, respectively.

The cleaning shoe area features a completely new design.

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By using aluminium, John Deere's engineers have increase the shoe size while retaining the weight of the previous unit.

With a sieve area of more than 6msq the cleaning shoe is now among the largest in its class.

To make the shoe easily adjustable, the fan has also been redesigned and all air inlets provide an even air intake and air distribution.

Tests in co-operation with universities have shown that the combines can operate at a high performance with low loss levels, across a wider range of fan settings.

This minimises losses, even for less inexperienced operators.

Unloading

With many farmers and contractors now unloading on the headland, reducing non-productive time is important. A faster unloading rate of up 125 litres/minute enables the 11,000-litre capacity grain tank to be emptied in less than 90 seconds.

If machine adjustments are complicated or time-consuming they are often simply not done, thereby reducing overall machine performance and grain quality.

With this in mind, Deere has developed a quick-engage 'Booster Bar'; a rasp bar that can be swung into the crop flow in less than three minutes in situations where more aggressive threshing is required, for example in barley.

The Booster Bar eliminates the use of de-awning plates to close the concave, which reduces the overall active separation area.

Additionally, as no filler plates are needed, the 600X header can be converted from barley to rape harvesting in three minutes. The rape knife also features a quick coupler.

With top speeds of up to 40kph, larger distances are no longer an issue for contractors with widespread fields.

The key advantages offered by tracked combines are that they give the operator more independence from weather conditions and allow travel on ground unsuitable for wheeled machines.

A footprint 1.7 times larger than that of an 800mm tyre reduces compaction and contributes to higher yields.

On tracks the maximum width of the 5/6 walker combines stays below 3.3/3.5m.

Connected

John Deere's new Connected Combine package enable operators to get the maximum performance out of a machine and manage the data recorded with the support of GPS.

AutoTrac hands-free steering allows the driver to concentrate on adjustments. Machine data such as fuel consumption, yield maps and hectares done, on several fields, can be transmitted via wireless data transfer to the safe online portal MyJohnDeere.com.

Here an operator can view or download data instantly as it is updated automatically on the go.

W-Series combines

The W-Series walker combines also benefit from many of the updates implemented in the new T-Series. A large 660mm diameter single threshing drum with 10 rasp bars is paired with redesigned walkers featuring a bigger area and steeper steps.

The W-Series combines also have the new cleaning shoe, the quick-engage Booster Bar and the high unloading rate. The 40kph top speed and tracks will also be available on selected models.

Finally, in terms of power plants the new combines use stage IV compliant John Deere PSS engines. The 9-litre engines increase power outputs, while the 6.8-litre versions feature an engine speed of 2200rpm, down by 200rpm, for better efficiency.

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