Case 621G - Engine Cooling System

7-MAINTENANCE
Enginecoolingsystem
OrganicidAcidTechnology(OAT)coolant
CASECONSTRUCTIONrequirestheuseofafullyformulatedOrganicAcidTechnology(OAT)basedcoolant.CASE
AKCELAACTIFULL™OTEXTENDEDLIFECOOLANTispreferred.Thecoolantmustmeetthespecications
outlinedintheCNHIndustrialmaterialspecicationMAT3624.Useofcoolantnotmeetingthisspecicationisnot
allowed.Mixingofdifferentcoolantbrandsisnotrecommended.
NOTICE:OATcoolantismandatoryforallFPTenginescomplianttoTIER4BemissionsusingSelectiveCatalytic
Reduction(SCR).NEVERmixOATcoolantwithconventionalcoolant.Undernocircumstancesshouldyoutopoffa
coolingsystemwithonlywater.Youcanusearefractometertochecktheconcentrationlevel.Youshouldnotuse
SupplementalCoolantAdditives(SCA)whenusingCASEAKCELAACTIFULL™OTEXTENDEDLIFECOOLANT.
Changethecoolantsolutionattherecommendedchangeinterval.
NOTE:mixtheCASEAKCELAACTIFULL™OTEXTENDEDLIFECOOLANTwith50%ofcleanwater.Waterfor
dilutionofOATcoolantconcentrate:distilledordemineralized.Ifdemineralizedwaterisnotavailable,usewaterfor
dilutionwiththefollowingproperties:
PropertyMaximumlimit
TotalSolids
340ppm
TotalHardness170ppm
Chloride(Cl)
40ppm
Sulfate(SO4)
100ppm
AciditypH5.5to9.0
Thissolutionensuresprotectionofthecircuitfrom-40.0°C(-40.0°F)to125.0°C(257.0°F).
Theoptimumcoolant/waterconcentrationis50/50.Thisconcentrationwillprotectthecoolingsystemto-37°C
(-35°F).Ifapremixedcoolantisnotavailable,mixtheconcentratewith50%ofwater.Thecoolantconcentrationin
thecoolant/watermixturecanbedeterminedwitharefractometerdesignedtomeasureethyleneglycolcontent.
Distilledwaterordeionizedwaterisrecommendedfortheuseintheenginecoolingsystems.
DONOTusehardwater,seawaterand,softenedwaterseathathasbeenconditionedwithsalt.Themineralsand
saltspresentinpotablewatercancausecorrosionanddepositsresultinginshortenedenginelife.
InthecasethatthecustomermayhavetoppedoffanOATcoolantsystemwithconventionalcoolant,followthe“Wash-
ingofthecoolingsystem”onthenextpagetoattainthefullbenetofthecoolant.
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