Posted 12/19/2013 09:03 (#3530441 - in reply to #3530277) Subject: Re: New Case IH MX 235 or used that doesn't require DEF fluid?
I think there are some basic systems on the road that don't have the sensors to tell whether the tank is full of water or DEF. That said, I don't think that is true for the ag market. I'm not sure of Case, but I know AGCO has a "quality" sensor in the tank that measures the density of the fluid. There are also NOx sensors in the exhaust. Between those two, you'd have a hard time getting it to run on straight water.