DD15 Improper Engine Coolant Level Troubleshooting

Check as follows:‪

1. Visually inspect the coolant level.
2. Examine the results.
   1. If the coolant level is within an acceptable range, check insufficient radiator air circulation; refer to “11.2 Insufficient Radiator Air Circulation” .
   2. If the coolant level is not within an acceptable range, fill coolant system to correct level; refer to the EPA07 DD15 Workshop Manual (DDC-SVC-MAN-0002), “Preventive Maintenance” chapter.
      

      ENGINE EXHAUST ‪
      To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic.‪

3. Start and run the engine.
4. Run the engine through its operating range with no-load for approximately 5 minutes, allowing the engine coolant to reach normal operating range.
   1. If the engine coolant temperature is 85-95°C (185-203°F). Shut down the engine and go to the next step.
   2. If the engine coolant temperature is above 85-95°C (185-203°F), shut down the engine. Check for insufficient radiator air circulation; refer to “11.2 Insufficient Radiator Air Circulation” .
5. Pressure test the cooling system with a pressure tester.
   1. Check for external leaks on the engine, radiator, all coolant hoses and the heater core in the cab.
   2. Repair any external leaks and go to the next step.
   3. If there are no external leaks perform the procedure found in section “11.2 Insufficient Radiator Air Circulation” .
6. Start and run the engine.
7. Run the engine through its operating range with no-load for approximately five minutes allowing the engine coolant to reach normal operating range.
   1. If engine the coolant temperature is 85-95°C (185-203°F). Shut down the engine no further troubleshooting is required.
   2. If the engine coolant temperature is above 85-95°C (185-203°F), shut down the engine. Check for insufficient radiator air circulation.Refer to “11.2 Insufficient Radiator Air Circulation” .