1. Get the diesel particulate filter (DPF) off the truck, get it cleaned with proper cleaning tools and conduct an inspection process appropriately.
2. Ensure a careful visual inspection is performed and flow and gauge pin testing is conducted. This certifies that a complete cleaning has been done. Some DPFs require more time in cleaning than others, and the cleaning process must be visible to the operator in order to determine when it is complete.
3. Never allow for the DPF to be “baked” in a kiln at a high temperature without first putting it through a thorough pneumatic airknife cleaning that strips as much soot and ash out of the DPF before proceeding to “bake” it. If this isn’t done, the onboard fuel could ignite and heat to near or above the melting point of the DPF substrate, causing permanent damage.
4. Insist on a dated data sheet that summarizes the before and after cleaning condition of the DPF. Tracking and recording the condition of the DPF is critical to managing future cleanings. If a small, hardened ash island has appeared in the DPF, maintenance intervals must be shortened and ash should be removed sooner (before it hardens and can no longer be cleaned).
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