Farm Ireland

Monday 11 December 2017

Direct drive optional extra promises fuel savings of up to 40pc efficiency

Other news from Deere at the Langar press launch centred on transmissions.

With its newly designed 24-speed direct drive transmission, Deere is bringing something to the machinery industry that was previously only seen in the car industry.

This transmission's dual clutch technology is the benchmark in the luxury car industry, but it will be available in a tractor for the first time from the end of this year.

Fuel savings of up to 4pc, compared with currently available transmissions, have been measured at test facilities at John Deere's German tractor factory in Mannheim and during independent field tests.

Direct drive will be optionally available on John Deere's new six-cylinder 6R Series tractors, from the 140hp 6140R to the top-of-the-range 210hp 6210R.

The direct drive transmission option adds €6,485 to the base list price of the six-cylinder 6R Series tractors quoted in the table below.

The transmission system consists of eight powershift speeds in each of three ranges, which are designed for typical field applications.

The system enables the driver to remain in the selected range for all relevant operations, so switching between ranges is rarely necessary, and the resulting minimal interruption to the power flow adds to the overall efficiency of the tractor's power train.

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The driver can choose between a manual mode to take command of forward and reverse speed changes via the tractor control lever, or an automatic mode.

The transmission system comprises two adjacent main drive shafts, each having four-speed gearing and an individual clutch.

Gears are changed with no loss of traction power, as one of the two clutches is always engaged. When the driver changes gear, one clutch disengages and the other engages in parallel; this action prevents any interruption to the power flow.

Overall, Deere says this design leads to an increase in efficiency and therefore better fuel use.

Range A works at speeds from 2.7-10.8kph at nominal engine speed and is the best range for traction work. Range B provides speeds of 5.4-21.5kph and is suitable for the vast majority of applications involving pto-driven implements. The eight powershift speeds of Range C are designed for transport work and cover a range from 13.8 to 42kph or, optionally, 54.6kph.

Interested readers can watch a video showing the direct drive in action on the John Deere website

Indo Farming