here's the link to Komatsu America's website. Good info on Komatsu's hy-brid excavator. http://www.komatsuamerica.com
here's the address to link to. http://www.komatsuamerica.com/hybrid
Komatsu has come out with their Tier 4 interim engines (I wish the gov't would quit these emissions ramp ups). Variable geometry turbos and DPF scrubber. No aftertreatment fluid yet.