Navistar MaxxForce 7 User Manual

SECTION2–REQUIREMENTSFORFUEL,ENGINEOIL,ANDCOOLANT
EngineOil(cont.)
OILVISCOSITY(cont.)
oilsforcorrectowduringstarting.Highertemperaturesrequire
highergradeoilsforsatisfactorylubrication.
•Ablockcoolantheaterisrequired,iftemperaturesarebelow
10°F(-12°C).
•Ablockcoolantheaterandoilpanheaterarerequired,if
temperaturesarebelow-10°F(-23°C).
•Forheavydutydrivingortrailertowing,higheroilgrades
15W-40and5W-40oilsarerequired,iftemperaturesare
over50°F(10°C).
Coolant
COOLANTMIXTURES
Enginecoolantmixturesincludewater,glycol(ethyleneor
propylene),andinhibitors.Conventionalandfullyformulated
coolantsrequireregulartestingofinhibitorlevelstomaintain
safelevelsofprotection.T estingofconventionalcoolant
determineslevelsofnitrite,nitrite/molybdate,andfreeze
pointprotection.Ifnecessary,SupplementalCoolantAdditives
(SCAs)areaddedtoreplenishinhibitors.
Extendedlifecoolantmixtures(waterandethyleneglycol)do
notrequireregulartestingofinhibitorlevelsoradditionofSCAs.
Seeserviceintervals(page63).
EXTENDEDLIFECOOLANT(ELC)-RED
HeavyDutyExtendedLifeCoolant(ELC)50/50Premixmeeting
CEMSB-1TypeIIIisthestandardfactoryllforthecooling
system.ThecoolantshouldminimallymeetASTMD6210,
StandardSpecicationforfully-FormulatedGlycolBaseEngine
CoolantforHeavyDutyEngines.
ELC50/50Extenderisaddedatthedesignatedserviceinterval.
ForfurtherinformationseeExtendedLifeCoolant(ELC)
Extender(page89).
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)
Page37

Navistar MaxxForce 7 Specifications

General

Brand	Navistar
Model	MaxxForce 7
Category	Engine
Language	English