User Manual

200 TROUBLESHOOTING
Page 9-7
ENGINE OVERHEATS
200779a
Possible Cause Correction
1. Coolant level low. 1. Locate cause. Look for leaking gaskets or loose or leaking hoses.
Repair, replace or tighten as required. Replenish coolant.
2. Loose or worn fan belts. 2. Adjust belt tension or replace belts as required.
3. Restricted airflow through radiator. 3. Remove any restrictions from the outer surface of the radiator.
4. Defective radiator pressure cap. 4. Test pressure of the radiator cap. Replace cap, if required.
5. Defective coolant thermostat or temperature
gauge.
5. Check opening temperature of thermostat. Check for correct
installation. Check temperature gauge. Replace if defective.
6. Fan improperly positioned or viscous drive fan
not operating properly.
6. Check fan operation. Repair as required.
7. Shutters not opening properly (for chassis
equipped with shutters).
7. Check shutter operation. Repair as required.
8. Combustion gases in coolant. 8. Determine point where gases are entering the cooling system.
Repair or replace parts as required.
9. Plugged oil cooler. 9. Remove oil cooler. Disassemble, remove restrictions/replace
parts as required. Reinstall.
10. Defective water pump. 10. Remove, repair or reinstall water pump as required.
11. Incorrect fuel injection pump-to-engine timing. 11. Check fuel injection pump to engine timing. Reset timing as
required.
12. Improper valve lash adjustment. 12. Adjust valve lash to specified clearance.
5-101.bk Page 7 Friday, March 17, 2006 11:05 AM