Case, New Holland and FIAT powertrains has a great solution to Tier4a/4b emmissions requiresments. No more do engines need to be tuned down to meet the EPA standards.
Tier 4 is bringing many challanges to tractor companies. CNH uses two different menthods depending on the end use of the tractor. This video is on the SCR solution that uses an uera solution to treat the exaust, allowing the engine to tuned for top performance.
Servicing a New Holland TN-Series
Pictures are of a TN70. Concepts apply to other models.
Before performing any of the following operations, be sure that engine is stopped and has been given adequate time to cool down