Terex Trucks has announced that a range of articulated haulers meeting the requirements of new U.S. Environmental Protection Agency (EPA) Tier 4 Final emissions regulations will be available soon in North America.

The 30-metric-ton (mt) capacity Terex TA300 hauler will be available initially, with the 40-mt TA400 entering production during August. Powered by Scania engines, the new articulated haulers not only feature low emissions, but also offer operating convenience as their Tier 4 Final system does not require a diesel particulate filter (DPF), reducing maintenance and fuel consumption. Terex Trucks’ Tier 4 Final technology also features latest generation Selective Catalytic Reduction (SCR) combined with Exhaust Gas Regeneration (EGR) technology and a Variable Geometry Turbo (VGT). The combination of EGR and SCR, plus a diesel oxidization catalyst (DOC), increases the efficiency of the SCR process.

A new feature resulting from the Tier 4 Final technical package is the introduction of a CAN-controlled engine exhaust brake. This, according to the company, provides improved reaction and performance of exhaust brake retardation and higher efficiency of Tier 4 Final after-treatment requirements, resulting in greater operator control and braking in downhill applications, further improving safety.