Navistar MaxxForce 7

SECTION5–MAINTENANCESCHEDULEANDSERVICEPROCEDURES
ServiceProcedures(cont.)
AIRINTAKEPIPINGANDCLAMPS
Foranyofthefollowingconditions,installnewparts:
•Loosehosesorclamps,tightenorreplaceasrequired
•Rupturedhoses
•Crackedaircleanerhousing
•DamagedChargeAirCooler(CAC)
COOLANTFREEZEPOINT
ServiceInterval:15,000miles(24,000km),6months,500
hours,or2000gallons(7570liters)offuel
CAUTION:Topreventenginedamage,donotuseDex-cool
®
in
MaxxForce
®
7engines.
ELC50/50Premixprovidesfreezeprotectionto-34°F(-36°C)
andmaximumcorrosionprotection.Ifacustomerwishesto
useaconventional(non-OATELC)coolant,itshouldminimally
meetASTMD6210,StandardSpecicationforfullyFormulated
GlycolBaseEngineCoolantforHeavyDutyEngines.ELC50/50
Premixisusedtoreplenishcoolantlossandensurethatglycol/
waterconcentrationsstayinbalance.
ELC50/50Extenderisaddedatthedesignatedserviceinterval.
FreezePointProtectionLevelsConcentrate(Ethylene
Glycol)andWaterMixtures
ConcentrateandWater
Mixtures
FreezePointProtection
40%Concentrateand60%
water
-12°F(-24°C)
50%Concentrateand50%
water
–34°F(37°C)
60%Concentrateand40%
water
-62°F(-52°C)
67%Concentrateand33%
water
-95°F(-71°C)
CAUTION:T opreventenginedamage,donotuseaconcentrate
andwatermixtureoflessthan40%concentrate.
Forvehiclesoperatinginextremelycoldclimates,coolant
mixturesof60%Concentrateand40%wateror67%
Concentrateand33%waterprovideadditionalfreezeprotection
asshowninthetableabove.Mixtureshavingmorethan67%
Concentratearenotrecommended.
Checkfreezepointwitharefractometer.
1.Putdropofcoolantonrefractometerwindow.
2.Lookthrougheyepieceandfocus.
3.Recordfreezepoint.
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