freightliner COLUMBIA CL112 Maintenance Manual page 114

49
maintenance inspections. If any discrepancies
are discovered, refer to the engine manufactur-
er's service literature for repair instructions.
05/28/93
Fig. 3, Donaldson Sealclamp Wide-Band Exhaust
1
10/20/2006
A. Inspect this area of the canister for dents.
1. Marmon Fitting at Inlet from Turbocharger
2. DOC Temperature Sensor
3. ATD Mounting Band
4. DPF Intake Pressure Sensor
5. DPF V-Band Mounting Clamps
49/2
f490025a
Clamp
2
4
3
2
Fig. 4, Typical After-Treatment Device
Definitions of ATS Components
Refer to the following list of definitions of ATS com-
ponents.
• After-Treatment System (ATS)—the entire ex-
haust system from the turbocharger to the ex-
haust stack or tail pipe.
• After-Treatment Device (ATD)—a muffler-like
canister that houses a DPF, DOC, and sensors.
• Diesel Particulate Filter (DPF)—a filter that col-
lects and holds particulate matter (soot and
ash).
• Diesel Oxidation Catalyst (DOC)—oxidizes hy-
drocarbons and reduces NOx.
• Sensors—detect temperatures and pressures in
the ATS.
Inspection
1. Check for leakage at the clamp that attaches the
exhaust pipe to the turbocharger exhaust outlet.
If leakage exists, tighten the nut on the clamp to
6
5
A
6. Sensor Housing
7. DPF Outlet Temperature Sensor
8. Exhaust Outlet Marmon Fitting
9. DPF Outlet Pressure Sensor
5
7
9
3
Columbia Maintenance Manual, January 2007
Exhaust
8
f490283