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MaxxForce DT/9/10 - DPF MAINTENANCE

The following lists the maintenance items required to properly perform the DPF Maintenance for most International MaxxForce DT DPF Systems. 

DPF


EXHAUST AFTERTREATMENT
      DPF & SCR MAINTENANCE


**PLEASE NOTE: It is highly recommended that the Engine OIL is changed before completing the DPF Maintenance, due to extremely frequent problems in "Cylinder Washout" and elevated Oil Levels due to Diesel Fuel Entry. These Engine Problems will affect DPF Performance.

**PLEASE NOTE: Many engine related service items listed below, as these items will drastically affect the DPF Performance.

Service the following:

  • SOOT/ASH CLEAN THE DPF CORE. 

  • SOOT CLEAN THE DOC CORE.

  • CORE RETENTION

    • ​Ensure no loss in "DPF CORE RETENTION" and "DOC CORE RETENTION". 

  • DPF DIFFERENTIAL PRESSURE SENSOR TUBING

    • Clear the DPF Differential Pressure Sensor TUBING of any soot blockage. 

  • DEF CRYSTALLIZATION 

    • ​Inspect the SCR Catalyst and Mixer, remove and clean as needed.

  • EXHAUST LEAKS 

    • Inspect the entire Exhaust System, repair any exhaust leaks found.

  • OIL ENTRY INTO ENGINE INTAKE & CAC - INSPECTION

    • ​Inspect the Engine Intake and CAC for Oil Entry, as the DPF Systems will run poorly. Generally a failing Centrifugical Crankcase Filter Assembly will cause Oil Entry into the Engine Intake. Over time the Impeller Blades will "gum up" not allowing the assembly to spin properly, allowing Oil to pass right through the assembly and into the engine intake and turbocharger(s), and ultimately into the DPF System. 

  • TURBOCHARGER FAILURE - INSPECTION

    • Inspect the Turbocharger(s) inlets and outlets for Oil Consumption. If high amount of Oil found, may need to replace the Turbocharger(s). 

  • FAULTS (ENGINE & DPF) - INSPECTION​

    • ​​​Inspect all Faults present, make repairs as needed to ensure no elevated levels of engine soot production.

  • CLEAR ALL FAULTS

    • ​Any Active Fault will stop all DPF/SCR Function.

  • DPF PARKED REGEN

    • Perform a DPF Parked REGEN and ensure runs to successful completion (if Exhaust Temps do not rise over ~500F possible Turbocharger, Turbo Actuator, or ITV problem. If suspect a Turbo, Exhaust Valve, or ITV issue, may consider running the Air Management System Test with N.E.D. diagnostic software. If Exhaust Temps do not rise over ~1,000F possible damaged DOC Core, Exhaust Leak, or Engine Fueling Issue, if Exhaust Temps exceed 1,200F and REGEN stops there may be high oil consumption). 


 

Replace the following:

  • DPF GASKETS

  • Dimpled Steel Inlet GASKET

  • RUBBER TUBING (Differential Pressure Sensor) (as needed)


 

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