Navistar MaxxForce DT Diagnostic Manual page 149

Pre-Diesel Oxidation Catalyst (PDOC)
The PDOC does the following:
• Aids in creating an exothermic reaction to improve exhaust emissions
• Allows for more efficient operation of the aftertreatment system
1. PDOC back bracket (attaches to
engine)
2. PDOC bracket
3. Exhaust Flange Gasket
Figure 42 Pre-Diesel Oxidation Catalyst (PDOC) (Typical)
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DIAGNOSTIC MANUAL
4. 11 x 20 x 24 mm spacer (3)
5. M10 x 50 bolt (3)
6. PDOC
7. M10 x 25 bolt (2)
145