freightliner Argosy COE 2011, Maintenance Manual

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maintenance inspections. If any discrepancies
are discovered, refer to the engine manufactur-
er’s service literature for repair instructions.
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
the required torque. If leakage persists, install a
new clamp.
2. Check the exhaust pipe, bellows, and each ex-
haust seal clamp for leakage, wear, cracks, or
damage. Replace damaged components as
needed. If leakage exists at a clamp, tighten the
nuts to the required torque. If leakage persists,
install a new exhaust seal clamp. Do not reuse
seal clamps. Once a seal clamp is loosened or
removed, it must be replaced.
NOTICE
A leak in the CGI piping, including the bellows,
will allow unfiltered air and contaminants into the
engine intake, and can cause serious engine dam-
age.
f490283
1
2
2
5
6
5
7
8
9
3
3
4
10/20/2006
A
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
6. Sensor Housing
7. DPF Outlet Temperature Sensor
8. Exhaust Outlet Marmon Fitting
9. DPF Outlet Pressure Sensor
Fig. 7, Typical After-Treatment Device
Exhaust
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