Emissions & Aftertreatment

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About Our Emissions & Aftertreatment Service

STS Truck Services repairs a lot of diesel trucks. We have master diesel technicians in Blair working on our team, and that is partly why we have attracted many companies who hire us to maintain their fleet vehicles. We expertly repair and maintain several diesel vehicles, including Cat, Cummins, Mercedes, Freightliner, Detroit, Volvo, Mack, Peterbilt, International, and Kenworth trucks and engines. When was the last time you had your diesel particulate filter (DPF) or diesel oxidation catalyst (DOC) cleaned? If the answer is, “I don’t know” and your truck is newer than a 2007 model, it is time to visit a repair shop. If your diesel engine is newer than 2007, here are a few things you should know to extend your filter life and increase your fuel efficiency.

Before we go into detail on why you need to clean your DPF and DOC, we need to discuss how these engine components work together. The DOC protects the DPF. Vapor can interfere with the DPF’s ability to trap and remove particulate matter, so manufacturers route the exhaust through the DOC first, then into the DPF. The DOC forces the exhaust over a honeycomb ceramic structure coated with a catalyst that chemically changes carbon monoxide and hydrocarbons to carbon dioxide and water. Then the exhaust gases go through the DPF where it is forced through porous channel walls, trapping, and holding the remaining ash and soot.

When is it time to have your DPF or DOC cleaned? A good rule of thumb is to go in for cleaning about every 200,000 miles or less depending on your duty cycle. It is possible to burn off this excess ash and soot on your own using either passive or active regeneration. Passive generation uses the normal exhaust temperatures and nitrogen dioxide to oxidize the build-up and active regeneration requires much higher temperatures. Even with these different cleaning cycles, it is still important to take your truck to get serviced.

Why should you have your DPF/DOC cleaned? When left uncleaned, soot and ash will collect and could damage or destroy your filter. While soot and ash burn off as quickly as it accumulates when driving under load, it tends to accumulate and stay when idling or driving through slow-moving traffic. A few key indicators that it is time for professional cleaning are a loss in engine performance or an increase in frequency in regeneration cycles. With regular DPF cleanings, you could see, increased fuel efficiency, extended filter life, and higher resale value if you decide to sell your truck at some point.

A dirty filter may not sound like it could cause a lot of damage if left unattended, you’d be surprised by how costly it could be. This makes cleaning a necessary part of maintenance. When you factor in that replacements cost about $3,000, if not more, plus the cost of unexpected downtime, neglecting this relatively simple process could greatly affect your bottom line.

Fleet work is a large portion of our business here at STS Truck Services and we employ two Certified Master Diesel Technicians. The reason? We make it about trust and a high level of service. The fleet sizes we work on range from two vehicles to large fleets. These fleets know they can count on us for expert service and maintenance. Some of our diesel customers include large corporations that rely upon their fleets to distribute their products around the Blair region and across the country

Owners of diesel vehicles love working with the STS Truck Services team. It's that easy for diesel owners. For more details on how to determine it is time to have your DPF/DOC serviced call STS Truck Services. From diesel engine maintenance to all levels of diesel repair, we can handle it all, big or small. If you think your diesel is in need of DPF maintenance, visit our service department now. Call us if you have specific questions, or contact us to schedule your appointment today. We look forward to taking care of you and your vehicles.

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