The Discovery Series excavators are mounted on Freightliner M2 chassis, with frames bulked up to handle the bending stress of excavator operations.
Models 190G W and 230G W wheeled excavators have a 159-horsepower Tier4-Interim Isuzu engine
Two new Cat wheel excavator models, the 318F and 320F, have maximum operating weights of 21.7 and 23.2 tons, respectively
Models R140W and R210W wheeled excavators have been upgraded to 9A Series with Cummins QSB6.7 engines that are certified for Tier 4-Interim.
Hyundai R180W-9A wheeled excavator has been upgraded with a Tier 4-Interim engine, a 155-horsepower Cummins QSB6.7.