Navistar MaxxForce DT Diagnostic Manual page 106

DIAGNOSTIC MANUAL
1. New Aftertreatment Fuel Injector
(AFI) gasket
Step
12
Do not remove the nozzle injector
from the doser housing. Spray pattern
test is no longer a visual check for
Aftertreatment
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 23)
• AFI and bore unrestricted and free of carbon buildup
• AFI tip free of cracks and other damage
Did AFI pass all visual checks?
102
Figure 23 AFI Gasket
Action
CAUTION
Fuel Injector (AFI)
https://www.truck-manuals.net/
2. Early production AFI gasket
Decision
Yes: Install AFI, and then go to step 13.
No: Correct failed visual check(s). After
repairs are complete, install AFI and go
to step 13.