I have seen some bobcats I’m considering going to check out. E50 2017and 2016. So neither have emissions stuff? How do they not need it as other brands ?
Its not that they dont have emissions it just that they dont use a DPF to achieve the emissions standard. To my knowledge the tailpipe standard is what has to be met but there is no mandatory rule that a manufacturer has to use certain technologies.
If you truly want to remain emissions free, 25hp and under has the only modern engine options that dont use any emissions related technology and its not even all of them as the most popular 25hp engine is Yanmar and it uses EGR. You're also only going to find excavators under 4 ton (8,960lbs) with a 25hp engine.
Technically speaking and anyone correct me if im wrong, crankcase recirculation, common rail, diesel exhaust fluid, diesel oxidation catalyst, diesel particulate filter, exhaust recirculation, and selective catalyst reduction are all technologies used to increase efficiency and meet emissions standards. Youll see them labeled as CCR, DEF, DOC, DPF, EGR, SCR. They all have drawbacks that many of us dont like.