Inspection procedure

Inspection: Pressure pipe and pressure hose
• Check the pressure pipe and hose for clogging by blowing compressed air into the pipe and hose.

Inspection: Diesel particulate filter
• Check the exhaust passage inside the diesel particulate filter for adhesion of soot in large quantity.
• If large amounts of soot are found, replace the diesel particulate filter because broken ceramic filter is suspected.

• Inspection: Catalytic temperature sensor, exhaust gas temperature sensor
– Check that the sensor portion is free of soot, oily substance, etc.
– If necessary, clean the sensor portion as follows.
– Spray a cleaner on the sensor portion from 2 to 3 cm away.
Recommended cleaners: Nonchlorinated solvent.
– In 20 to 30 seconds after spraying, wipe the sensor portion clear of the sprayed cleaner using a soft waste cloth or the like.

Installation procedure

• Installation: Rear oxidation catalyst
– Screw the nut A onto the shorter threaded side of the stud bolt until it cannot be turned any more.
– Insert the stud bolt with nut A attached into position from the diesel particulate filter side. Fit the gasket and the rear catalyst and tighten the nut B to the specified torque.

Inspection procedure

Inspection: Inlet body
• Inspect the front oxidation catalyst of inlet body visually.
• Replace the inlet body if any abnormalities such as break are found.

Inspection: Outlet body
• Check the inside the outlet body for adhesion of soot in large quantity.
• If a large amount of soot accumulation is found, perform exhaust gas checks because faulty engine parts are suspected. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)

Inspection: Filter body
• Check the ceramic filter for damage from the rear of the filter body.
• If any fault is found, replace the filter body.
• Clean the filter body if the ceramic filter is dirty even if no abnormalities are found. (See “ON-VEHICLE INSPECTION AND ADJUSTMENT”.)


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