Hino (CATALYZED) - DPF MAINTENANCE

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.

• DEF NOZZLE CLEANING

  • Remove the DEF Nozzle, clean all DEF Crystallization using distilled water. If DEF Nozzle is suspected to be in poor condition run the DEF NOZZLE FLOW TEST via PTT, to confirm correct volume of DEF Fluid passing through DEF Nozzle.

• OIL ENTRY INTO ENGINE INTAKE & CAC - INSPECTION

  • Inspect the Engine Intake for signs of Oil entry, clean and repair as needed. The DPF System will run poorly. Generally an old clogged CCV Filter will cause oil entry, but also may be due to failed Turbocharger and other issues.

• 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. 

• ECU SOFTWARE UPDATES

  • Check for any ECU Software Updates, update as needed via HINO DX2.

• DPF PARKED REGEN

  • Perform a DPF Parked REGEN and/or SCR Performance Test and ensure passes. If Exhaust Temps do not rise over 500F, check the Turbocharger & VGT Actuator. If Exhaust Temps do not rise over 1,000F, inspect the DPF Fuel Injector and/or the DOC Core.