Diagnostic Information Coolant Temperature Too Low JC89288,0000053 –19–04APR06–1/1 Coolant Temperature Too Low Diagnostics Procedure –1/1 Coolant in Oil or Oil in Coolant JC89288,0000054 –19–21APR06–1/1 Coolant in Oil or Oil in Coolant Diagnostics Procedure –1/1 TM2361 (24JUN08) 9010-15-15 450DLC Excavator Operation and Tests 062608 PN=285 1 Coolant Temperature Check Measure coolant temperature with a gauge of known accuracy to determine if coolant temperature is below normal. Is coolant temperature ok? YES: Go to Thermostat Check. NO: Repair or replace parts as necessary and retest. – – –1/1 9010 15 15 2 Thermostat Check Make sure thermostat is operating correctly.
Is thermostat operating correctly? NO: Repair and replace parts as necessary and retest. – – –1/1 1 Head Gasket Check Look for signs of a head gasket failure. Is head gasket in good condition? YES: Go to Oil Cooler Check. NO: Replace and repair parts as necessary and retest. – – –1/1 2 Oil Cooler Check Remove and inspect engine oil cooler. See Oil Cooler Remove and Install. (Group 0500.) Is oil cooler in good condition? YES: Go to Cylinder Liner Check. NO: Repair or replace oil cooler. – – –1/1