Symptom Tree
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 or loose |
Check the fan drive belt. Replace the belt if necessary. Refer to Procedure 103-002 (Drive Belts) in Section 3. |
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Cold weather radiator cover or winterfront is closed |
Open the cold weather radiator cover or the winterfront. Maintain a minimum of 784 cm2 [122 in2] or approximately 28 x 28 cm [11 x 11 in] of opening at all times. Refer to Procedure 101-015 (Operating the Engine) in Section 1. |
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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. Check the shutterstat setting. Refer to the OEM service manual. |
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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 |