Case 621G - Selective Catalytic Reduction (SCR) - Overview

7-MAINTENANCE
SelectiveCatalyticReduction(SCR)-Overview
DieselExhaustFluid(DEF)/AdBlue®instrumentationwarning
ATTENTION:thefuelsystem,exhaustafter-treatmentsystem,andengineonyourmachinearedesignedandbuilt
togovernmentemissionsstandards.Tamperingbydealers,customers,operators,andusersisstrictlyprohibitedby
law.Failuretocomplycouldresultingovernmentnes,reworkcharges,invalidwarranty,legalaction,andpossible
conscationofthemachineuntilreworktooriginalconditioniscompleted.Engineserviceand/orrepairsmustbe
donebyacertiedtechnicianonly!
YourmachineisequippedwithawarningsystemtoinformtheoperatoroftheDEF/ADBLUE®level,systemmalfunc-
tions,andenginepowerlossthatmayresultfromtheSCRsystemforreducingexhaustemissions.
Duringnormaloperationofyourmachine,theinstrument
clusterdisplaystheDEF/ADBLUE®uidlevelatalltimes.
Warninglightsandindicatorswillilluminatewithawarning
onthevisualdisplay.Thedisplaychangesautomatically
toallowtheoperatortoviewthewarningindicatorand
displaymessage.
TheDEF/ADBLUE®levelbargauge
indicatesthelevelofdieselexhaustuid
intheDEF/ADBLUE®tank.Whenallbars
areilluminated,thetankisfull.Illuminated
barsindicatethelevelofuidremainingin
theDEF/ADBLUE®tank.Whenthetank
isat5–10%oftankvolume,thewarning
systemwillashand/orwillashand
soundanaudiblealarmdependentupon
DEF/ADBLUE®levels.
LEIL15WHL0575AA1
DEF/ADBLUE®levelgauge
GaugeindicationCondition
MasterindicatorAlarmstatus
6–10%
Noenginepowerloss
Caution(yellow)
None
5%andbelow
Moderateenginepower
loss
Caution(yellow)Continuous
Empty
SevereenginepowerlossStop(red)Continuous
Stopmasterindicator(red,critical)
TheStopMasterIndicatorisacriticalwarningdisplay.Seethe“CriticalWarnings”table.
WhentheStopMasterindicatorilluminates,IMMEDIATELYbringthemachinesafelytoa
stop,andturntheengineOFF .
Display
Description
CorrectiveAction
PoorDEF/
ADBLUE®
Quality
Detected,
PowerLimited
Moderateengine
powerlosshasbegun,
upto65%torque
reductionand40%
enginespeedwithin
40minofengine
runningtime.
DEF/ADBLUE®quality/concentrationisquestionable.Drainthetankand
discardtheDEF/ADBLUE®.FillwithnewDEF/ADBLUE®.
NOTE:see“DEF/ADBLUE®tankrelling”sectionforimportanttankdraining
information.
DEF/ADBLUE®
InjectionFailed
PowerLimited
SCRfault/failure
detected.Upto65%
torquereductionand
40%enginespeed
reductionwithin
40min.
Contactyourlocalauthorizeddealerforrepair.
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