Navistar MaxxForce DT Diagnostic Manual page 53

1. New Aftertreatment Fuel Injector
(AFI) gasket
Step
7
Do not remove the nozzle injector from the
doser housing.
longer a visual check for Aftertreatment Fuel
Injector (AFI) replacement.
Perform Aftertreatment Fuel Injector (AFI) visual inspection.
Remove the AFI doser housing from the turbo outlet pipe (see
Engine Service Manual) and perform the following visual checks:
• Correct AFI gasket is installed (Figure 4).
• AFI and bore are unrestricted and free of carbon buildup
• AFI tip free of cracks and other damage
Does AFI pass all visual checks?
Figure 4 AFI Gasket
Action
CAUTION
Spray pattern test is no
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DIAGNOSTIC MANUAL
2. Early production AFI gasket
Yes: Install AFI and go to step 8
No: Correct all faults found during
visual check(s). After repairs are
complete, install AFI and go to step
8.
Decision
49