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| A 6140 would be a TierIVb, so things are a little different than what has been suggested here. On the CNH combines, there is a serviceable prefilter for the DEF system. It looks like a 2-3" long stainless steel filter that has a nut on one end that will allow you to disassemble it so that you can clean it. Take it apart and clean it with deionized water. It should be in the neighborhood of the DEF module(should be shown in your ops' manual as well).
You can check what the pressure of your DEF system is 2 different ways. You can either put it on a "Run" screen on your Pro700 or else you can look at it on the "Combine information" screen on the Pro700 as well. It should be at least 130psi(they usually run 140-150psi during normal operation). See what this pressure is after you clean the filter. The pressure will not build right away on a Tier IVb machine, unlike Tier IVa where the pressure would build up right after you started the engine. If the pressure reaches this spec., the system should fix itself. If it runs too long at too low of a pressure, it will derate itself and need to be reset with a laptop. Good luck! | |
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DEF Injection Failure - Iveco engine
