Symptom Tree
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Electronic fault codes are active |
For instructions on how to read active fault codes, refer to Diagnositc Fault Codes in Section 1. If fault codes are active, contact a Cummins Authorized Repair Facility. |
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Engine is misfiring |
Refer to the Engine Runs Rough or Misfiressymptom tree. |
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Engine idle speed is set too low (electronically controlled fuel systems) |
Verify the correct idle speed setting. Increase the idle speed with the idle increment switch or an electronic service tool. Refer to Section 1. |
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Belt-driven accessories are malfunctioning |
Check the fan hub, alternator, freon compressor, and hydraulic pump for interference. Isolate belt-driven accessories, and check for vibration. Refer to Section 6. |
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Fan is loose, damaged, or notbalanced |
Check the fan. Refer to Section 3. |
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Engine mounts are worn, damaged, or notcorrect |
Check the engine mounts. Refer to the OEM service manual. |
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Vibration damper is damaged |
Inspect the vibration damper. Refer to Section 7. |
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| Contact a Cummins Authorized Repair Facility |
