The following comment was posted to our website, ConstructionEquipment.com. It has been edited for grammar and style. 1. Special Report: 2015 Fleet Masters "How to Handle Tier 4-Final" by Frank Raczon "Interesting article. I am quite interested to see how things are working-or not-in the real world. A couple of comments: 2. Evaporation is mentioned regarding DEF and I just don't see this occurring. Any and all systems used for DEF from initial production until final usage alongside an engine are closed, so there would just not be a means for this to occur unless there was a failure of some sort. It doesn't make sense to worry about a nonexistent problem.
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