New Holland to adopt SCR to meet emissions rules

New Holland says it will use Selective Catalytic Reduction (SCR) in all tractors over 100hp to meet Tier 4A emissions regulations. Machines under 100hp, meanwhile, will use a Cooled Exhaust Gas Recirculation (CEGR) system.


SCR has already been used in over 100,000 NEF and Cursor truck engines which hail from the same Fiat Powertrain Technologies stable.

The new regs come into play in 2011 and affect engines ranging from 174hp upwards.

Agco became the first tractor manufacturer to use SCR in its tractors when it launched the Massey Ferguson 8690 range. The technology doesn’t compromise horsepower or torque, say manufacturers and means the engine can be configured to run at maximum capacity.

A catalytic converter treats the nitrogen oxides in the exhaust gas with a mixture of urea and water, converting the oxides into water and nitrogen.

The urea mixture is stored in a subsidiary tank and will require operators to fill it as they would a normal fuel tank. The additive will be available through New Holland dealers and can be stored on farm, too.

New Holland will begin using SCR in its engines from 2011 onwards, and the company says that SCR technology will also play a part in meeting the final set of Tier 4B requirements due to come arrive in 2014.

• To read more about SCR, click here.