Navistar MaxxForce DT Diagnostic Manual page 114

DIAGNOSTIC MANUAL
1. New Aftertreatment Fuel Injector
(AFI) gasket
Step
13
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 24)
• AFI and bore unrestricted and free of carbon buildup
• AFI tip free of cracks and other damage
Did AFI pass all visual checks?
110
Figure 24 AFI Gasket
Action
CAUTION
Fuel Injector (AFI)
https://www.truck-manuals.net/
2. Early production AFI gasket
Decision
Yes: Install AFI, and go to step 14.
No: Correct failed visual check(s). After
repairs are complete, install AFI and go
to step 14.