Navistar International LT Series - Top-Off Coolant Fill Method; Top-Off Instructions for International A26

MaintenanceInstructions
CAUTION
Topreventpropertydamage,ifthecoolantshould
getextremelylowandtheengineveryhot,letthe
enginecoolforapproximately15minutesbefore
addingcoolant;then,withtheenginerunning,
addcoolantslowly.Addingcoldcoolanttoahot
enginemaycrackthecylinderheadorcrankcase.
Neverusewateralone.
Top-OffCoolantFillMethod
Thisisatraditionalgravity-ll-onlymethodthatinvolves
pouringorpumpingthecoolantintothedeaerationtankofthe
coolingsystemandusingacombinationofgravityandengine
operationtopurgethesystemofair.Thismethodincludes
thedisadvantageofarequirementtotemporarilydisconnect
theEGRwiringharnesstoprotecttheEGRfromheatdamage
priortobeingcompletelydeaerated(freedoftrappedair).This
processmaygenerateafaultcodethatmightrequirefurther
investigationbyanauthorizedInternationaldealer.
EnsurethatcoolantlevelismaintainedbetweentheCOLDMIN
andCOLDMAXlinesonthedeaerationtankwhenengineis
cold.
Top-OffInstructionsforInternational
®
A26Engines
ForvehicleswithInternational
®
A26engines,seethefollowing
instructionsontoppingoffthecoolingsystem.
TypicalInternational
®
A26CoolingSystemDeaerationTank
1.Deaerationtank
2.Ventedllcap
3.COLDMINandCOLDMAXlines
NOTE:Ventedllcapmaydifferslightlyinlocationontank
betweenenginesizes.
Ifthecoolingsystemislowandneedstobetoppedoff,ensure
thatthecorrectcoolantandcoolantmixtureareused.The
coolingsystemshouldbelledwithapremixedcoolantora
50/50mixtureofcoolantconcentrateandwater.
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