You are at the point that NC farmer has described- you now need a diagnostic scan tool from the dealer. I think the owner has ignored the warning light and failed to do the parked regen when he should have. Once it is too late, the only way to do a forced regen is with their laptop diagnostic tool. A normal regen is done automatically by the engine's ECM as needed, as long as running conditions are met-high rpms and working hard-idling won't do it. A manual regen is done by the operator when the dash light indicates the need to; it is also called a parked regen because you must park the tractor with the exhaust away from anything flammable, and the ECM must recognize that it is in neutral, and the park brake is applied-then you hold the switch-maybe 3 or 4 seconds- until the rpms increase- and then you wait until it is complete- and the rpms drop. Leave it idle-the exhaust will be 1100*s plus- for just a few moments or go back to work. A forced regen is done with the diagnostic laptop. The regen adds extra fuel into the exhaust stream and raises the rpm. This causes the soot to burn off of the catalyst face in the DPF, and it then collects the soot ash in the next compartment of the DPF, where some day it will have to be removed and cleaned. While the diagnostics are being done, the tech needs to look at the stored regen history of the tractor to check for any other issues. The operator(s) need to be taught how the system works and to NOT ignore any warning lights. Low rpms and light duty are the MAIN cause of the catalyst face clogging up: working the engine hard and keeping the exhaust hot is the key keeping the soot burnt off of the catalyst face in the DPF. There should NEVER be any smoke/soot coming out of the exhaust pipe. Good luck, Mark.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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