Navistar MaxxForce DT Diagnostic Manual page 122

DIAGNOSTIC MANUAL
1. New Aftertreatment Fuel Injector
(AFI) gasket
Step
7
Do not remove the nozzle injector
from the doser housing.
pattern test is no longer a visual
check
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 25)
• AFI and bore unrestricted and free of carbon buildup
• AFI tip free of cracks and other visible damage
Did AFI pass all visual checks?
118
Figure 25 AFI Gasket
Action
CAUTION
Spray
for Aftertreatment Fuel
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2. Early production AFI gasket
Decision
Yes: Install AFI, then go to step 8.
No: Correct items that failed visual
check(s). After repairs are complete,
install AFI and go to step 8.