If it has a DPF filter, there never should be any smoke whatsoever. If it is clogged there are sensors on both sides of the filter to see the pressure difference between inlet and outlet, to tell if it is clogged. These readings are able to be read with the diagnostic computer. The way a DPF works is- the engine computer senses the need to regen and over fuels a tiny bit, usually with an injector downstream after the turbo. The extra fuel hits the catalyst face in the DPF and causes the burn. This burn results in ash which is collected in another part of the DPF, which eliminates smoke and harmful particulates from entering the air. There are also inlet and outlet temperature sensors, as well as NOx sensors. You have to really understand the system to interpret the readings and do diagnostics. Your tech should have done a forced regen, too. Mark.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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