Navistar MaxxForce 9

DIAGNOSTICMANUAL
1.NewAftertreatmentFuelInjector
(AFI)gasket
2.EarlyproductionAFIgasket
Figure1AFIGasket
Step
ActionDecision
7
CAUTION
Donotremovethenozzleinjectorfromthedoser
housing.Spraypatterntestisnolongeravisualcheck
forAftertreatmentFuelInjector(AFI)replacement.
PerformAftertreatmentFuelInjector(AFI)visualinspection.RemoveAFI
(SeeEngineServiceManual)andcheckforthefollowing:
VisualChecks:
•CorrectAFIgasketisinstalled(Figure1)
•AFIandboreunrestrictedandfreeofcarbonbuildup
•AFItipfreeofcracksandotherdamage
DidAFIpassallvisualchecks?
Yes:InstallAFI,
andgotostep8.
No:Correctfailed
visualcheck(s).
Afterrepairsare
complete,install
AFIandgotostep
8.
14
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