4.
If present, check the condition of the insulation
material around the exhaust pipe between the
turbocharger and the ATD.
5.
Check the ATD mounting bands for tightness. If
needed, tighten the mounting bands on horizon-
tally and vertically mounted ATDs to 30 lbf·ft (41
N·m); on step-mounted ATDs, tighten the mount-
ing bands to 15 lbf·ft (20 N·m). Do not over-
tighten.
6.
Check for leaks around the clamps that attach
the ATD in the ATS, and around the clamps that
retain the DPF in the ATD.
7.
Check all sensors attached to the ATD for leaks
or damaged wires. No leaks are allowed.
8.
Check the DPF exterior surface for dents or
other damage. See Ref. A of
Fig. 4
. A dent over
3 inches (76 mm) in diameter or 1/4-inch (6-mm)
deep could cause internal damage to the DPF,
causing it to malfunction.
9.
Check for heat discoloration on the surface of
the ATD. Heat discoloration may indicate internal
damage; especially around the DPF.
10. Check any wires, lines, or hoses within 4 inches
(10 cm) of the exhaust system for heat damage.
Repair or reroute as needed.
09/16/2009
1
2
3
4
5
6
7
8
9
10
11
f490353
10
9
8
1.
DEF Metering Unit
2.
DEF Nozzle
3.
SCR Outlet Temperature
Sensor
4.
SCR Inlet Temperature Sensor
5.
DOC Inlet Temperature Sensor
6.
DOC Inlet Pressure Sensor
7.
DPF Inlet Temperature Sensor
8.
DPF Outlet Pressure Sensor
9.
DPF Outlet Temperature
Sensor
10. DPF Outlet NOx Sensor
11. SCR Outlet NOx Sensor
Fig. 2, 2V2 Two-Box ATS Sensor Locations
Exhaust
49
Cascadia Maintenance Manual, November 2015
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