Navistar MaxxForce DT Diagnostic Manual page 45

1. New Aftertreatment Fuel Injector
(AFI) gasket
Step
14
Do not remove the nozzle injector from the
doser housing. Spray pattern test is no longer
a visual check for Aftertreatment Fuel Injector
(AFI) replacement.
Perform Aftertreatment Fuel Injector (AFI) visual inspection.
Remove AFI (see Engine Service Manual) and check for the
following:
Visual Checks:
• Correct AFI gasket is installed (Figure 4)
• AFI and bore unrestricted and free of carbon buildup
• AFI tip free of cracks and other damage
Did AFI pass all visual checks?
Figure 3 AFI Gasket
Action
CAUTION
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DIAGNOSTIC MANUAL
2. Early production AFI gasket
Yes: Install AFI, and go to step
15
No: Correct failed visual
check(s). After repairs are
complete, install AFI and go to
step 15.
Decision
41