TM-9-2320-387-24 HMMWV Direct Support & General Support Maintenance Manual Volume 1 Download
Page 217 of 1205
TM 9-2320-297-24-1 ENGINE COOLING DIAGNOSTIC FLOWCHART KNOWN INFO NONE POSSIBLE PROBLEMS COOLING COMPONENTS SERPENTINE BELT WATER PUMP 8 PULLEY KNOWN INFO COOLANT QUALITY OK POSSIBLE PROBLEMS COOLANT LEVEL COOLING COMPONENTS SERPENTINE BELT WATER PUMP 8 PULLEY I KNOWN INFO COOLANT OK 1 POSSIBLE PROBLEMS THERMOSTAT COOLING COMPONENTS SERPENTINE BELT WATER PUMP & PULLEY IS THE COOLANT MIXTURE CORRECT? (SEE CHART ON PAGE 2-159.) IS THE COOLANT AT THE CORRECT LEVEL? IS THE THERMOSTAT WORKING PROPERLY? ;T OPllONS 1 .COOLANT MIXTURE TEST KIT NSN 6630-0@169-1 SO6 P.CDOlANT TESTER NSN 6630-00-105-1416 REASON FOR QUESTION The cooling system will not operate property if the mixture is incorrect. r OPTIONS VISUAL REASON FOR QUESTION Low coolant levels may cause overheating. ;T OPTIONS FEEL FOR COOLANT IN UPPER RADIATOR HOSE WHEN ENGINE IS HOT, OR REMOVE THERMOSTAT, EXPOSE f-f-TO 190°F (66’ C) TEMPERATURES. SEE IF IT OPENS. REASON FOR QUESTION An improperly functioning thermostat can cause operating temperatures that are either too hot or too cold.