Navistar MaxxForce 13 User Manual

DIAGNOSTICMANUAL
Step
ActionDecision
4
Determineifremovedaftertreatmentsystemcomponents
needtobecleanedseeDPFandDOCreuseguidelines
page159.
BasedonDPFandDOCRe-UseGuidelines,doanyofthe
removedaftertreatmentsystemcomponentsneedtobe
cleaned?
Yes:Cleancomponentsusing
appropriatecleaningequipment.After
cleaningprocedureiscomplete,install
componentsandgotostep6.
No:Installremovedaftertreatment
systemcomponents,andthengoto
step6.
Step
ActionDecision
5
Determinerootcauseofexhaustsystemcontamination.
(SeeEngineSymptomsDiagnosticssectioninEngine
DiagnosticManual.)
Afterrepairsarecomplete,gotostep7
Step
ActionDecision
6
DieselParticulateFilter(DPF)SnapAccelerationTest(Quick
Test).ThisprocedurecheckstheDPFforcracksorinternal
damagewithoutremovingtheDPFfromthevehicleandis
usedtotestbasicfunctionalityoftheDPF .Thisistobedone
priortoremovingtheDPF .
1.Thetransmissionmustbeinneutralandthe
parkingbrakeapplied.
2.Startandidletheengine.
3.Rapidlysnaptheacceleratorpedalfromidle
tofullthrottle.Thiscanbeperformedmultiple
times.
4.Duringtheengineaccelerations,visuallycheck
foraheavyblacksmokeexitingtheexhaust
pipe.
Isblacksmokevisible?
Yes:Gotosymptom5(HeavyDuty):
Blacksmokepage113.
No:Gotostep7
97
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Navistar MaxxForce 13 Specifications

General

Brand	Navistar
Model	MaxxForce 13
Category	Engine
Language	English