Symptom Tree
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Vehicle speed is too low for adequate cooling with high engine load |
Reduce the engine load. Increase the engine (fan) rpm by downshifting. |
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Fan shroud is damaged or missing or the air recirculation baffles are damaged or missing |
Inspect the shroud and the recirculation baffles. Repair, replace, or install, if necessary. Refer to the OEM service manual. |
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Fan drive belt is broken |
Check the fan drive belt. Replace the belt, if necessary. Refer to Procedure 008-002 (Drive Belt, Cooling Fan) in Section A. |
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Radiator shutters are not opening completely or the shutterstat setting is wrong |
Inspect the radiator shutters. Repair or replace if necessary. Refer to the manufacturer’s instructions. Check the shutterstat setting. |
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Charge air cooler fins, radiator fins, or air conditioner condenser fins are damaged or obstructed with debris |
Inspect the charge air cooler, air conditioner condenser, and radiator fins. Clean, if necessary. Refer to Procedure 010-028 (Charge Air Piping) in Section 3. |
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| Contact a Cummins Authorized Repair Facility |
