Navistar MaxxForce 9

DIAGNOSTICMANUAL
1.NewAftertreatmentFuelInjector
(AFI)gasket
2.EarlyproductionAFIgasket
Figure2AFIGasket
Step
ActionDecision
13
CAUTION
Donotremovethenozzleinjectorfromthe
doserhousing.Spraypatterntestisnolongera
visualcheckforAftertreatmentFuelInjector(AFI)
replacement.
PerformAftertreatmentFuelInjector(AFI)visualinspection.Remove
AFI(seeEngineServiceManual)andcheckforthefollowing:
VisualChecks:
•CorrectAFIgasketisinstalled(Figure2)
•AFIandboreunrestrictedandfreeofcarbonbuildup
•AFItipfreeofcracksandotherdamage
DidAFIpassallvisualchecks?
Yes:InstallAFI,andgoto
step14.
No:Correctfailedvisual
check(s).Afterrepairsare
complete,installAFIandgo
tostep14.
31
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