John Deere unveiled its new top-of-the -range six- cylinder tractor models for the first time, the 6230R and 6250R, at last week's Lamma farm machinery show in England.
These tractors should interest contractors and large scale tillage farmers and will complete Deere's 6R Series line up from this summer.
John Deere is hoping the 230hp-rated 6230R and 250hp-rated 6250R will set new standards for transport, operator comfort and acceleration on the road.
Thanks to an engine boost of 50hp with intelligent power management (IPM), the bigger 6250R tractor provides up to 300hp when required. With a weight of 9.3 tonnes, the 6250R delivers more power than any other tractor in this weight class, along with an impressive power density of 31kg/hp.
The high maximum permissible weight of 15 tonnes also allows a 5.7 tonne payload, which means the tractor is able to transport heavier loads.
Both these new tractors are powered by a 6.8-litre PowerTech PSS engine equipped with dual turbochargers.
As is standard kit these days, they also feature advanced diesel particulate filter and selective catalytic reduction technology.
The latter features help the engine to respond to changing loads while consuming less fuel and meeting the latest demanding Stage IV engine emission standards.
Transmission-wise, an upgraded AutoPowr transmission delivers maximum efficiency, with 100pc mechanical power available at 3.5km/h for heavy draft operations, 11km/h for light draft work, 22.5km/h for heavy transport and 47.2km/h for light transport duties.
Once running at maximum road speed, rpm automatically drops. A speed of 50km/h is maintained at 1630rpm, while 40km/h is maintained at 1300rpm. Deere says this all results in lower fuel consumption on the road.
Inside the cab the tractors feature an all-new CommandPRO joystick, which aims to improve the driving experience in terms of ergonomics and versatility. Top speed can be reached with just one push, and 11 programmable buttons are available for the hitch, PTO, spool valves, AutoTrac controls, etc. The functionality of the CommandPRO joystick allows the tractor to be controlled from top speed to zero with a simple push or pull of the joystick, and lower speeds from 0 to 2km/h can be achieved with the creeper control function. Both the joystick and pedals can be operated at the same time.
There is no need for an external Isobus joystick as the driver can also operate the tractor and Isobus functions simultaneously.
Equipped with a pressure and flow compensated hydraulic system, the new 6R Series tractors deliver a powerful maximum flow of 160 litres/minute at 1500rpm.
This also saves fuel, even in the most demanding hydraulic applications.
Up to six spools with individual pressure-relief levers have been grouped together for easier access, and new lift capacities are 10.4 tonnes on the rear hitch and 5 tonnes at the front.
The 6230R and 6250R tractors have a few new features aimed at improving operator comfort.
A hydro-pneumatic cab suspension system offers more driving comfort and isolation from noise and vibration.
Better traction and up to 10pc more power applied to the ground are provided by the new self-levelling triple link suspension system on the front axle.
This automatically adjusts sensitivity and suspension rate, and synchronises with hitch sensing to compensate for power hop under heavy draft conditions.
Less arm movement and significantly less steering effort is required by the variable ratio steering system, which can be activated and deactivated from the tractor's control console.
Key service points on the new 6R Series tractors are easy to access for maintenance. Both models feature 750 hour engine oil filter, fuel filter and engine oil intervals, helping to further reduce parts and servicing costs.
A lifetime diesel particulate filter and low diesel exhaust fluid consumption of 2 to 3pc provide additional savings.