Category Archives: 6.7L Cummins

The aftertreatment diesel particulate filter differential pressure sensor is marked with “HI” on one side of the sensor (1 ). This indicates that the high-side differential pressure sensor connects to this port. The high-side differential pressure sensor tube connects to the aftertreatment system before the inlet to the diesel particulate filter. NOTE: In vertical aftertreatment… Read More »

Inspect the inside of the tube. If the tube is partially clogged, saturate the inside of the tube with a mineral based solvent, or equivalent. Carefully clean debris from the mouth of the tube. Make sure to not damage the tube. If the tube is fully clogged or otherwise unable to be cleaned, the tube… Read More »

NOTE: The mounting location of the aftertreatment diesel particulate filter differential pressure sensor varies with exhaust aftertreatment orientation and OEM mounting location. Remove the spring clamps from the stainless steel tube end of the flexible hose sections attached to the exhaust gas filter pressure sensor. Loosen the aftertreatment diesel particulate filter differential pressure sensor tube… Read More »

NOTE: A cylindrical locating tab may be welded to the outside of the catalyst canister to position the differential pressure sensor mounting bracket. NOTE: Make sure the aftertreatment system is oriented so the aftertreatment diesel particulate filter differential pressure sensor is installed in the same orientation noted during disassembly. Install the differential pressure sensor mounting… Read More »

Inspect the differential pressure sensor mounting bracket for cracks, damaged threads, or broken studs. Replace the differential pressure sensor mounting bracket, if damaged. Inspect the differential pressure sensor mounting bracket strap for cracks, damaged threads, or broken studs. Replace the differential pressure sensor mounting bracket, if damaged.    

Remove the nut on the aftertreatment diesel particulate filter differential pressure sensor mounting bracket strap. NOTE: A cylindrical locating tab may be welded to the outside of the catalyst canister to position the differential pressure sensor mounting bracket. Note the orientation of the mounting bracket prior to removal. NOTE: Remove the differential pressure sensor mounting… Read More »

Due to the number of exhaust aftertreatment applications, this procedure is generic. Not all illustrations within the procedure will represent all applications. The exhaust aftertreatment system is composed for four sections. These sections are: • Inlet • Aftertreatment Diesel Oxidation Catalyst • Aftertreatment Diesel Particulate Filter • Outlet NOTE: In some applications, the catalyst can… Read More »

Install new gaskets on the inlet and outlet of the exhaust gas aftertreatment diesel oxidation catalyst. Apply a coat of anti-seize compound on the threads of the V-band clamps and Torcal’M clamps. Install the aftertreatment diesel oxidation catalyst. NOTE: In some applications, a locating tab was integrated into the gasket retaining ring. The locating tab… Read More »

Remove any residual gasket material from the flanges on the aftertreatment diesel particulate filter with a putty knife. NOTE: Avoid dropping fragments of gasket material into the aftertreatment diesel particulate filter. NOTE: If the aftertreatment diesel particulate filter is being inspected due to progressive damage that introduced engine oil, or excessive fuel into the exhaust,… Read More »

Draw an orientation reference line across each of the V- band clamps, aftertreatment canister sections, and connection points to the tailpipe. This will aid in linking up sections and V-band clamps to their original orientation during installation. Mark the direction of exhaust flow on both the aftertreatment diesel oxidation catalyst section and the aftertreatment diesel… Read More »