Daniel Mustafa, deputy director of technical development for Travel Centers of America, he said, still looks honest people otherwise great things to do with their trucks, $ 1000 major repairs to be expected in an overwhelming soul transform less annoying than a $ 11,000 as systems aftertreatment truck engines in 2007 and emission specifications later, price tags on the problems of the mounting units connected quickly failure messed that occur along the line.
In the specific example, a shared Kenworth occurred after 2015 until the end of the shot by the process of the warning light Passing (the icon at the bottom of the image below below). Repair is necessary not only cooking / blowing ash from the particulate filter, but replacing the diesel oxidation catalyst (DOC), immediately upstream of the particle filter in the exhaust system, which had DPF itself and Turbo given excessive pressure to escape damage it.
Mustafa CFO error warning
** 1 (above) to indicate the exhaust gas temperature is high, that the passive regeneration starts. This occurs when the engine is under at least 50 percent of the load, often during transportation on the heavier side at highway speeds. Regeneration, in general is the process by which the temperature of the exhaust rotary obstruction DPF soot increases parts ash less obstruction.
** 2. The "light regeneration is required," as it is called Mustafa. As it must be in relation to the system regenerates active or passive. asking Start with force: "please," Mustafa said, then greater urgency to display begins to flash and the motor starts to lower or reduce energy production.
** 3. The engine (yellow) starts with a derating of 20 percent (reduced energy production), then moves to 40 percent, which, if he had not noticed 20 percent, have probably noticed, said Mustafa. "When you get to this point, you are in trouble and can not make an update -. A service center is needed "
** 4. The light engine stop (red) - [concern] "engine failure is likely," says Mustafa manuel says Cummins - there.
Unlike conventional approaches to oil change and other service intervals - intervals hard almost depending on the application and equipment - it is quite difficult to leave the customer satisfaction to clean the mile interval a DPF is maintained. Why?
"The difference could hundreds of thousands to hundreds of thousands of miles to be", depending on the application, says Mustafa, professional / Urban / stop-and-go applications with many shorter intervals so long and hard. "It is very difficult to nail someone to give a maintenance interval."
It is recommended that "to judge with a service center in collaboration where you are" working to clean up a matter of necessity "measures the degree of restriction [exhaust stream] in the DPF." Al 130.00 miles, test will flow filter , You do it again the next maintenance interval, then, even though the next. "Working with some of his companions," those who like mpg, style and driving have application. Everyone plays a role, including the level of empty Mustafa extend the life of the DPF and a larger system recommended. The intervals will be shorter, even when the foot is sufficiently sealed. "If you have a heavy foot, makes more soot" that must be burned in the regeneration, more and ash that eventually clog the filter.
For drivers, the core of long-term business with a lot of time on the road more than 50 percent of the load on the engine, which can go up to 200 000 225,000 miles before the need to take the test filter, Mustafa said. Get cleans before the break, he adds, "and you never have a problem."
Passive regeneration v. rain active
There regeneration passive "occurs naturally in 50-60 percent [more] engine load," said Mustafa, when 570 degrees and can reach higher temperatures of the exhaust gases. In the context of an active feedback, which is determined by a number of measures caused gripped by the operator when the vehicle is stationary, the fuel metering valve before the Department of Commerce enabled in the system to form the time to 1100-1200 degrees burning the soot. Passive regeneration at low temperature, of course, said Mustafa, is "much better for the system [long-term health] encourage active" as it is best for a particular mpg fuel waste in a parked process.
Whether to cook and clean air or air only
The ashes of a DPF and blow clean, soot effectively were, have turned into ashes. If your truck efficient regeneration before making the ash cleaning the cooking process, provide many service technicians not necessary, says Mustafa. "The thermal cleaning does not diminish, but it is easier to clean air [air]. If your truck only clean air is needed to go successfully through regeneration. "If not, bake and stroke. The cleaning process Cooking / heat takes 6-8 hours.
If the engine to separate a diesel fluid 2010 or after emission specifications and using (DEF) for the system of nitrogen and oxygen in NOx Selective Catalytic Reduction (SCR) exhaust méfiez- le long periods of inactivity (one month or longer) in extreme weather conditions stored and / or DEF for extended periods of time without air conditioning. "At first," Mustafa, the "biggest mistake I see is that the fluid DEF truck parked for a long time and to come back and make it work." DEF car 32.5 percent urea and 67 5 percent water. Said If very long periods of extreme heat or extreme cold crystallized "is part of its water content lose," he added.
to lose as little as 1 percent of the content, according to some estimates, and is very likely to get active fault codes "low quality DEF," Mustafa said. Finally declassify the ECM level engine, a function of the EPA required malfunction of the SCR system was "not affect the service life of the motor or motor skills," he added, "to ensure that the operator complies with emissions standards. ... If you run out of DEF, deteriorate five miles per hour. "
Other Customers Mustafa, were a drain and rinse with hot water to fill preventive maintenance procedures after every service interval of the reservoir section DEF.
Engine Maintenance "is a higher priority than ever before"To avoid problems later in post - avoid handling system and high repair costs may - be the , what the most important can be done as the above is to keep the engine in liquid systems. What happens "compromise" DPF can "every engine oil, coolant" into the exhaust stream, Mustafa said. "A leaky injector fuel excessive" at the front of the dispenser DOC "... Everything goes to" derail this fast filter. hot liquid in a skirt ", fully connect the filter.
In the case of an obligation Filter "if you want to reliably route the time to replace the filter," said Mustafa, but before doing so, create some conditions that includes the disease the support device first. If only a technician "trying to make a filter and saw these conditions, you are feeding the problem. Let no service technician to have a filter. Find out why "problem.
If the DPF needs cleaning, clean - the - do not jump on exchange programs Reman
If you exchange cleaned with a Reman do CFO of another operation, it is possible that the inheritance of the created by the previous problems (see above). A Reman filter is "as good as how the person previously operated his vehicle," Mustafa said. If you use a unit Reman, "inherited problems if you set this filter. If you have not had any problems, I implore you to get your own Reset. "
Any advice you can exchange on these topics? Skip the comments below.
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