Navistar MaxxForce 9

DIAGNOSTICMANUAL
1.NewAftertreatmentFuelInjector
(AFI)gasket
2.EarlyproductionAFIgasket
Figure3AFIGasket
Step
ActionDecision
14
CAUTION
Donotremovethenozzleinjectorfromthe
doserhousing.Spraypatterntestisnolonger
avisualcheckforAftertreatmentFuelInjector
(AFI)replacement.
PerformAftertreatmentFuelInjector(AFI)visualinspection.
RemoveAFI(seeEngineServiceManual)andcheckforthe
following:
VisualChecks:
•CorrectAFIgasketisinstalled(Figure4)
•AFIandboreunrestrictedandfreeofcarbonbuildup
•AFItipfreeofcracksandotherdamage
DidAFIpassallvisualchecks?
Yes:InstallAFI,andgotostep
15
No:Correctfailedvisual
check(s).Afterrepairsare
complete,installAFIandgoto
step15.
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