No, you can't use water or pee. Def is 33% urea 66% deionized water. The urea breaks down in the heat of the exhaust to release ammonia. The ammonia reacts in the selective catalyst reduction section of the exhaust to convert NOX to nitrogen and water. You might be able to fool the low level warning with water, but eventually the system is going to detect elevated NOX levels and eventually derate speed. DEF fluid in the fuel tank is certain death to the fuel system. It's very corrosive to metal. One speck of rust is enough to stick an injector open or closed. Probably why they have a barrel of Def to get rid of is it's a perishable product. Stored over 90 degrees can cause it to degrade to the point it no longer controls NOX.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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